Tennis Racket Weight Calculator

Tennis Racket Weight Calculator: Find Your Ideal Balance body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: #f8f9fa; color: #333; line-height: 1.6; margin: 0; padding: 0; } .container { max-width: 1000px; margin: 20px auto; padding: 20px; background-color: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } header { background-color: #004a99; color: #fff; padding: 20px; border-radius: 8px 8px 0 0; text-align: center; } header h1 { margin: 0; font-size: 2.2em; } .calculator-section { padding: 30px 0; border-bottom: 1px solid #eee; } .calculator-section:last-child { border-bottom: none; } h2, h3 { color: #004a99; text-align: center; margin-bottom: 20px; } .loan-calc-container { background-color: #e9ecef; padding: 25px; border-radius: 8px; margin-bottom: 30px; } .input-group { margin-bottom: 20px; font-size: 1.1em; } .input-group label { display: block; margin-bottom: 8px; font-weight: 600; color: #004a99; } .input-group input[type="number"], .input-group select { width: calc(100% – 22px); padding: 12px; border: 1px solid #ccc; border-radius: 5px; font-size: 1em; box-sizing: border-box; margin-top: 5px; } .input-group .helper-text { font-size: 0.85em; color: #6c757d; margin-top: 5px; display: block; } .error-message { color: #dc3545; font-size: 0.9em; margin-top: 5px; display: none; /* Hidden by default */ min-height: 1.2em; /* Reserve space */ } .button-group { text-align: center; margin-top: 25px; } .btn { padding: 12px 25px; margin: 0 10px; border: none; border-radius: 5px; cursor: pointer; font-size: 1.1em; transition: background-color 0.3s ease; } .btn-primary { background-color: #004a99; color: white; } .btn-primary:hover { background-color: #003366; } .btn-secondary { background-color: #6c757d; color: white; } .btn-secondary:hover { background-color: #5a6268; } .btn-success { background-color: #28a745; color: white; } .btn-success:hover { background-color: #218838; } #results { background-color: #fff; padding: 25px; border-radius: 8px; margin-top: 30px; box-shadow: inset 0 1px 5px rgba(0,0,0,0.05); } #results h3 { color: #004a99; text-align: left; margin-bottom: 15px; } .result-item { margin-bottom: 15px; padding: 10px; border-left: 4px solid #004a99; background-color: #f1f3f5; border-radius: 3px; } .result-item strong { color: #004a99; } .highlight-result { font-size: 1.8em; font-weight: bold; color: #28a745; margin-top: 10px; padding: 15px; background-color: #e9f7ec; border: 1px dashed #28a745; border-radius: 5px; text-align: center; display: block; } .formula-explanation { font-size: 0.95em; color: #555; margin-top: 15px; padding: 10px; background-color: #f1f3f5; border-radius: 5px; border-left: 3px solid #6c757d; } .chart-container, .table-container { margin-top: 30px; padding: 20px; background-color: #f1f3f5; border-radius: 8px; } caption { font-size: 1.1em; font-weight: bold; color: #004a99; margin-bottom: 10px; caption-side: top; text-align: left; } table { width: 100%; border-collapse: collapse; margin-top: 10px; } th, td { border: 1px solid #ccc; padding: 10px; text-align: right; } th { background-color: #004a99; color: white; text-align: center; } td:first-child { text-align: left; } tr:nth-child(even) { background-color: #e9ecef; } canvas { display: block; margin: 10px auto; max-width: 100%; height: auto; } .article-content { margin-top: 40px; padding: 30px; background-color: #fff; border-radius: 8px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); } .article-content h2, .article-content h3 { text-align: left; color: #004a99; margin-top: 30px; } .article-content p { margin-bottom: 15px; } .article-content ul, .article-content ol { margin-left: 20px; margin-bottom: 15px; } .article-content li { margin-bottom: 8px; } .article-content strong { color: #004a99; } .faq-section { background-color: #f1f3f5; padding: 20px; border-radius: 5px; margin-top: 20px; } .faq-item { margin-bottom: 15px; } .faq-item strong { color: #004a99; display: block; cursor: pointer; font-size: 1.1em; } .faq-item p { margin-top: 8px; padding-left: 15px; border-left: 3px solid #004a99; background-color: #fff; padding: 10px; border-radius: 3px; display: none; /* Hidden by default */ } .internal-links-section { margin-top: 30px; padding: 20px; background-color: #f1f3f5; border-radius: 8px; } .internal-links-section ul { list-style: none; padding: 0; } .internal-links-section li { margin-bottom: 10px; border-bottom: 1px dashed #ccc; padding-bottom: 8px; } .internal-links-section a { color: #004a99; text-decoration: none; font-weight: bold; } .internal-links-section a:hover { text-decoration: underline; } .internal-links-section p { font-size: 0.9em; color: #555; margin-top: 5px; } .footer { text-align: center; margin-top: 40px; padding: 20px; font-size: 0.9em; color: #6c757d; } .copy-button { background-color: #6c757d; color: white; } .copy-button:hover { background-color: #5a6268; }

Tennis Racket Weight Calculator

Find the perfect racket balance for your game.

Calculate Your Ideal Racket Weight

Beginner Intermediate Advanced Professional Select your general tennis playing experience.
Baseline/Groundstroke All-Court Serve and Volley What is your most common style of play?
Estimate your swing speed in km/h (e.g., 50-100 km/h).
Low (Control Focused) Medium (Balanced) High (Power Focused) Do you prioritize control or raw power?

Your Recommended Racket Weight & Insights

Weight Adjustment Factor:
Swing Speed Factor:
Style Power Modifier:
Formula Used:

The recommended racket weight is calculated based on a composite score derived from your playing level, primary playing style, estimated swing speed, and desired power output. Different styles and speeds have varying needs for mass to generate power or maintain control. Higher swing speeds generally benefit from lighter rackets to maintain maneuverability, while a more power-focused style might lean towards slightly heavier rackets. The factors are adjusted and combined to provide a sensible weight range. This calculator provides an estimate, and personal preference is paramount.

Racket Weight vs. Swing Speed

Impact of Swing Speed on Recommended Racket Weight Across Styles

Typical Racket Weights & Their Characteristics

Weight Category Approx. Weight (Unstrung, grams) Primary Benefits Best For
Lightweight 240 – 260g Maneuverability, speed, easy handling Beginners, juniors, players with slower swings
Mid-weight 260 – 290g Balance of power, control, and stability Intermediate to advanced players, all-court players
Heavyweight 290 – 320g+ Power, stability, plow-through Advanced to professional players, strong groundstokers

What is a Tennis Racket Weight Calculator?

ATennis Racket Weight Calculator is a specialized tool designed to help tennis players identify a suitable weight range for their next racket. It takes into account various player-specific factors such as skill level, playing style, swing speed, and desired outcomes (like power or control). The primary goal of a tennis racket weight calculator is to simplify the often complex decision of choosing a racket, moving beyond just aesthetics or brand names to a more data-driven approach. By inputting key variables, players can receive a personalized recommendation that aligns with their physical attributes and on-court strategy. This is crucial because the weight of a tennis racket significantly influences its balance, maneuverability, stability, and power potential. Understanding and utilizing a tennis racket weight calculator can lead to better performance and reduced risk of injury.

Who Should Use a Tennis Racket Weight Calculator?

Virtually any tennis player looking to purchase a new racket can benefit from using a tennis racket weight calculator. This includes:

  • Beginners: Often unsure of what specs matter most, a calculator can guide them toward a forgiving and easy-to-handle racket.
  • Intermediate Players: As players develop their game, they might be looking to upgrade or fine-tune their equipment. A calculator can help them understand how changing racket weight might impact their evolving style.
  • Advanced and Competitive Players: These players often have very specific needs. While they might already have a good idea of what they want, a calculator can serve as a reference point or help them explore options they hadn't considered.
  • Players Experiencing Arm Issues: While not a medical device, understanding racket weight can help players choose a lighter racket to potentially reduce strain. However, consulting a professional is always advised for injuries.
  • Players Seeking Equipment Changes: If a player feels their current racket is too heavy, too light, too slow, or lacks stability, a calculator can provide objective data to guide their next choice.

Common Misconceptions About Racket Weight

Several myths surround tennis racket weight. One common misconception is that "heavier is always better for power." While more mass can contribute to power (plow-through), a racket that is too heavy for a player's swing speed will actually decrease power due to reduced swing velocity and control. Conversely, some beginners believe the lightest racket is always the easiest to use, but a racket that's too light may lack stability and offer less forgiving feel on off-center hits. Another misconception is that racket weight is the only factor determining performance; balance point, head size, string pattern, and stiffness all play critical roles. A good tennis racket weight calculator attempts to balance these variables.

Tennis Racket Weight Calculator Formula and Mathematical Explanation

The calculation for a recommended tennis racket weight is not a single, universally standardized formula but rather a heuristic model designed to provide a sensible starting point. Our tennis racket weight calculator uses a weighted approach, combining several key player inputs to derive a target weight range. The core idea is to balance maneuverability (influenced by swing speed and player level) with stability and power potential (influenced by racket mass and playing style).

Step-by-Step Derivation:

  1. Baseline Weight Assignment: A base weight is assigned based on the player's level and style. For example, a beginner baseline player might start with a recommendation in the mid-weight category, while a professional serve-and-volleyer might lean towards a slightly lighter, more maneuverable weight.
  2. Swing Speed Adjustment: Swing speed is a critical factor. Faster swing speeds allow players to generate more power and require lighter rackets to maintain maneuverability and avoid fatigue. Slower swing speeds might benefit from a slightly heavier racket for added power. This is typically applied as a multiplier or an additive/subtractive value to the baseline.
  3. Power Preference Adjustment: If a player desires more power, a slight increase in the recommended weight might be applied, assuming their swing speed can support it. Conversely, a focus on control might slightly decrease the recommended weight for better racquet head speed and touch.
  4. Racket Weight Factor Calculation: The adjustments are combined to produce a "Weight Adjustment Factor." This factor modifies the initial baseline recommendation.
  5. Final Output: The final output is a target unstrung racket weight in grams (g), often presented as a range (e.g., 275-290g).

Variable Explanations:

Let's break down the variables used in our tennis racket weight calculator:

  • Playing Level: Categorizes the player's experience (Beginner, Intermediate, Advanced, Professional). Affects baseline recommendation and sensitivity to other factors.
  • Playing Style: Categorizes the player's typical on-court strategy (Baseline, All-Court, Serve and Volley). Influences the desired balance between power, stability, and maneuverability.
  • Swing Speed: Measured in km/h. A primary determinant of maneuverability needs. Faster swings can handle heavier rackets but often prefer lighter ones for speed.
  • Desired Power Level: Player's preference for raw power versus control.

Variables Table:

Variable Meaning Unit Typical Range
Playing Level Player's general experience and skill Categorical (Beginner, Intermediate, Advanced, Professional) N/A
Playing Style Player's dominant on-court strategy Categorical (Baseline, All-Court, Serve and Volley) N/A
Swing Speed Estimated speed of the racket head during a stroke km/h 30 – 120 km/h
Desired Power Level Player's emphasis on generating force Categorical (Low, Medium, High) N/A
Recommended Racket Weight Estimated ideal unstrung racket weight grams (g) 240 – 320g+
Weight Adjustment Factor Intermediate calculation based on swing speed Numeric Factor 0.8 – 1.2 (example range)
Style Power Modifier Adjustment based on playing style and power preference Numeric Modifier -15g to +15g (example range)

Practical Examples (Real-World Use Cases)

Example 1: The Developing Baseliner

Player Profile: Sarah is an intermediate tennis player who spends most of her time at the baseline, hitting groundstrokes. She has a moderately fast swing speed (around 75 km/h) and feels her current racket is a bit slow to generate pace. She wants a bit more power without sacrificing too much control.

Inputs:
  • Playing Level: Intermediate
  • Primary Playing Style: Baseline/Groundstroke
  • Swing Speed: 75 km/h
  • Desired Power Level: Medium
Calculator Output:
  • Weight Adjustment Factor: 1.05
  • Swing Speed Factor: 1.00
  • Style Power Modifier: +10g
  • Recommended Racket Weight: 280-295g
Interpretation: Sarah's profile suggests she needs a racket that offers a good blend of stability for her groundstrokes and enough mass to help with power generation, but not so much that it hinders her swing speed. The calculator recommends a mid-to-heavyweight racket, slightly favouring the heavier end due to her desire for more power and moderate swing speed. This range allows her to hit with more authority while maintaining good maneuverability for defensive shots or quick volleys. This might be a good upgrade from a lighter, beginner frame.

Example 2: The Agile Serve-and-Volleyer

Player Profile: David is an advanced player who frequently approaches the net. He has a very fast swing speed (around 100 km/h) and prioritizes quick reactions and racket maneuverability for volleys and overheads. He doesn't need a racket to generate power for him; he provides it himself. Control and feel are paramount.

Inputs:
  • Playing Level: Advanced
  • Primary Playing Style: Serve and Volley
  • Swing Speed: 100 km/h
  • Desired Power Level: Low (Control Focused)
Calculator Output:
  • Weight Adjustment Factor: 0.90
  • Swing Speed Factor: 1.15
  • Style Power Modifier: -10g
  • Recommended Racket Weight: 260-275g
Interpretation: David's fast swing speed and net-rushing style dictate a need for a lighter racket. The calculator reflects this by recommending a lighter frame. This weight allows him to whip the racket head around quickly for fast serves and sharp volleys, providing the responsiveness needed for aggressive play. The preference for control further reinforces the recommendation for a lighter, more maneuverable option. Using a racket that's too heavy would severely hamper his ability to react and play effectively at the net. This is a great example of how a tennis racket weight calculator can tailor advice beyond generic recommendations.

How to Use This Tennis Racket Weight Calculator

Our Tennis Racket Weight Calculator is designed for simplicity and effectiveness. Follow these steps to get your personalized racket weight recommendation:

  1. Input Your Playing Level: Choose from Beginner, Intermediate, Advanced, or Professional. Be honest about your current skill set.
  2. Select Your Primary Playing Style: Indicate whether you primarily play from the baseline, employ an all-court strategy, or focus on serve-and-volley tactics.
  3. Estimate Your Swing Speed: Provide an approximate swing speed in kilometers per hour (km/h). If unsure, aim for a general range (e.g., slow: <60 km/h, medium: 60-80 km/h, fast: 80-100 km/h, very fast: 100+ km/h).
  4. Specify Desired Power Level: Choose between Low (focus on control and feel), Medium (balanced approach), or High (prioritize raw power).
  5. Click "Calculate Weight": Once all fields are populated, click the button.

How to Read the Results:

  • Intermediate Values: These provide insight into how each input affects the calculation (e.g., how your swing speed tempers the recommendation).
  • Recommended Racket Weight: This is the primary output, presented as a weight range in grams (g). This is the unstrung weight. Remember that strings and overgrips add a small amount of weight.
  • Formula Explanation: Read this to understand the general logic behind the calculation.

Decision-Making Guidance:

The recommended weight range is a starting point. Consider these factors:

  • Test Rackets: If possible, demo rackets within your recommended range. Feel is subjective.
  • Existing Equipment: Compare the recommendation to your current racket. If it's significantly different, understand why.
  • Physical Condition: If you have any history of arm or shoulder issues, lean towards the lighter end of the recommended range or consult a professional.
  • Preference: Ultimately, the racket that feels best in your hand and allows you to play your best game is the right one.

Don't forget to check out our related tools and resources to further enhance your understanding of tennis equipment selection, perhaps our Tennis Racquet Balance Point Calculator.

Key Factors That Affect Tennis Racket Weight Results

While our tennis racket weight calculator aims for accuracy, several real-world factors can influence the ideal racket weight for a player:

  1. Balance Point (Swingweight): This is arguably more important than static weight. A racket's balance point (measured in cm or inches from the butt cap) determines if it feels head-heavy or head-light. Higher balance points (more head-heavy) often feel heavier and provide more power, while lower balance points (more head-light) feel lighter and offer more maneuverability. Our calculator implicitly considers this by factoring in playing style and desired power, which are correlated with balance preferences.
  2. Swingweight: This measures the perceived weight of the racket during the swing – essentially, how difficult it is to accelerate and decelerate. It's a function of static weight, balance point, and mass distribution. A high swingweight means more power and stability but less maneuverability. A low swingweight means more maneuverability but less inherent power and stability. While not a direct input, it's what the calculator implicitly tries to optimize.
  3. Player Strength and Stamina: A player might have a fast swing speed but lack the strength or stamina to comfortably handle a racket at the heavier end of a recommendation for long matches. This can lead to fatigue, loss of technique, and increased injury risk. Personal physical capacity is key.
  4. Technique Nuances: Even within a "style," technique varies. A player with excellent technique might generate more power and spin from a lighter, faster-swinging racket, whereas someone relying more on brute force might benefit from a heavier frame's stability.
  5. Type of Play (Singles vs. Doubles): Doubles play often requires quicker reactions, more volleys, and faster changes of direction. Players focusing heavily on doubles might prefer slightly lighter, more maneuverable rackets than a comparable singles player.
  6. String Tension and Type: While not directly affecting racket weight, string tension significantly impacts feel, power, and control. Higher tensions generally offer more control, while lower tensions offer more power and comfort. This can influence how a player perceives their racket's performance and might subtly affect their tolerance for a given racket weight.
  7. Grip Size and Material: An improperly sized grip can lead to tension in the arm and hand, affecting swing mechanics and perceived racket weight/control. The choice of overgrips or replacement grips can also add marginal weight and change the feel.
  8. Head Size and String Pattern: Larger head sizes offer bigger sweet spots and more power but can be less maneuverable. Dense string patterns (e.g., 18×20) offer more control, while open patterns (e.g., 16×19) offer more spin and power. These factors interact with racket weight.

Frequently Asked Questions (FAQ)

What is the standard weight for a tennis racket?

The term "standard" is relative, but most adult performance rackets fall between 260g and 320g (unstrung). Lightweight rackets under 260g are typically for beginners or juniors, while very heavy rackets over 320g are for highly specialized players.

Does racket weight affect spin?

Indirectly, yes. While string pattern and racket head speed are primary drivers of spin, a heavier racket with a higher swingweight can provide more stability and plow-through, helping players drive through the ball more effectively, which can enhance spin potential, especially on groundstrokes. Lighter rackets allow for faster head speed, which is also crucial for generating spin.

Should I choose a heavier or lighter racket if I have arm pain (e.g., tennis elbow)?

Generally, players experiencing arm pain should opt for lighter rackets (towards the lower end of their recommended range) with a more head-light balance. This reduces the stress on the arm during the swing. However, it's crucial to also consider racket stiffness (lower is better for arm comfort), string type, string tension, and technique. Consulting a medical professional or a qualified tennis stringer/coach is highly recommended.

What's the difference between static weight and swingweight?

Static weight is the actual weight of the racket as measured on a scale. Swingweight is a measure of the racket's rotational inertia – how heavy it feels during the swing. Two rackets can have the same static weight but feel very different in terms of swingweight due to their balance point and mass distribution.

Can a beginner use a professional player's racket weight?

It's highly unlikely to be beneficial. Professional players typically use heavier rackets (often custom-weighted) with faster swing speeds and highly developed technique. A beginner using such a racket would likely struggle with control, power, and potentially increase their risk of injury due to the racket's weight and demanding specifications.

Does the calculator account for the weight of strings?

The calculator provides a recommended *unstrung* weight. Strings typically add about 15-25 grams to the total weight, depending on the string type and tension. This is the industry standard for racket specifications.

How does racket balance point factor into this calculator?

While not a direct input, the calculator infers balance preferences based on playing style and power desires. For instance, serve-and-volley players prioritizing maneuverability often prefer more head-light rackets (lower balance point), while baseline players seeking power might prefer slightly more head-heavy rackets (higher balance point). The calculated weight range implicitly guides towards rackets commonly available in those balance points for the specified player type.

Is it better to have a heavier or lighter racket for groundstrokes?

For groundstrokes, it's a balance. Heavier rackets offer more stability and "plow-through" for powerful shots, while lighter rackets allow for faster swings, more spin, and easier maneuverability, especially on defensive shots or when returning heavy pace. The ideal weight depends heavily on the player's swing speed, strength, and whether they prioritize power or control.

Related Tools and Internal Resources

© 2023 Your Tennis Resource. All rights reserved.

Disclaimer: This calculator provides recommendations based on common principles. Personal preference and professional advice are paramount.

var chartInstance = null; // Global variable to hold chart instance function getInputValue(id) { var inputElement = document.getElementById(id); if (!inputElement) return NaN; // Return NaN if element not found var value = inputElement.value.trim(); if (value === "") return NaN; return parseFloat(value); } function getSelectValue(id) { var selectElement = document.getElementById(id); if (!selectElement) return null; return selectElement.value; } function setErrorMessage(inputId, message) { var errorElementId = inputId + "Error"; var errorElement = document.getElementById(errorElementId); if (errorElement) { if (message) { errorElement.innerText = message; errorElement.style.display = 'block'; } else { errorElement.innerText = "; errorElement.style.display = 'none'; } } } function isValidNumber(value, min, max) { return !isNaN(value) && value >= min && value <= max; } function calculateRacketWeight() { // Clear previous errors setErrorMessage('swingSpeed'); var playerLevel = getSelectValue('playerLevel'); var playingStyle = getSelectValue('playingStyle'); var swingSpeed = getInputValue('swingSpeed'); var desiredPower = getSelectValue('desiredPower'); var isValid = true; // Validate Swing Speed if (!isValidNumber(swingSpeed, 30, 120)) { setErrorMessage('swingSpeed', 'Please enter a valid swing speed between 30 and 120 km/h.'); isValid = false; } if (!isValid) { document.getElementById('mainResult').innerText = 'Invalid Input'; document.getElementById('weightFactor').innerText = '–'; document.getElementById('swingFactor').innerText = '–'; document.getElementById('styleModifier').innerText = '–'; updateChart([], []); // Clear chart on invalid input return; } // — Intermediate Calculations — var weightFactor = 1.0; var swingFactor = 1.0; var styleModifierGrams = 0; // Swing Speed Factor if (swingSpeed 90) { // Faster swing swingFactor = 0.9; // Favors lighter for maneuverability } else { swingFactor = 1.0; // Medium swing } // Style and Power Modifier if (playingStyle === 'baseliner') { if (desiredPower === 'high') { styleModifierGrams = 15; // More power for baseliners } else if (desiredPower === 'medium') { styleModifierGrams = 10; } else { // Low power styleModifierGrams = 0; } } else if (playingStyle === 'allcourt') { styleModifierGrams = 5; // Balanced approach } else if (playingStyle === 'serveandvolley') { styleModifierGrams = -10; // Less weight for volley maneuverability if (desiredPower === 'high') { // Override if they want power despite style styleModifierGrams = 0; } } // Player Level Adjustment (simplified – affects base or modifier) var levelMultiplier = 1.0; if (playerLevel === 'beginner') { levelMultiplier = 0.95; // Slightly lighter, easier to handle } else if (playerLevel === 'intermediate') { levelMultiplier = 1.0; } else if (playerLevel === 'advanced') { levelMultiplier = 1.05; } else if (playerLevel === 'professional') { levelMultiplier = 1.1; // Can handle more weight/stability } // — Base Recommendation (Conceptual, mapped to weight ranges) — var baseWeight = 275; // Starting point in grams if (playerLevel === 'beginner') baseWeight = 260; if (playerLevel === 'intermediate') baseWeight = 275; if (playerLevel === 'advanced') baseWeight = 285; if (playerLevel === 'professional') baseWeight = 295; // — Combine factors — var calculatedWeight = baseWeight * swingFactor * levelMultiplier; calculatedWeight += styleModifierGrams; // Ensure within reasonable bounds calculatedWeight = Math.max(240, Math.min(320, calculatedWeight)); // Clamp between 240g and 320g // — Final Result Range — var lowerBound = Math.round(calculatedWeight – 10); var upperBound = Math.round(calculatedWeight + 5); // Slightly wider upper range lowerBound = Math.max(240, lowerBound); // Clamp bounds upperBound = Math.min(320, upperBound); // — Display Results — document.getElementById('mainResult').innerText = lowerBound + ' – ' + upperBound + 'g (Unstrung)'; document.getElementById('weightFactor').innerText = weightFactor.toFixed(2); document.getElementById('swingFactor').innerText = swingFactor.toFixed(2); document.getElementById('styleModifier').innerText = styleModifierGrams + 'g'; // — Update Chart Data — var chartLabels = []; var chartData = []; var swingSpeedsForChart = [40, 60, 80, 100, 110]; // Example speeds for chart for (var i = 0; i < swingSpeedsForChart.length; i++) { var speed = swingSpeedsForChart[i]; var tempSwingFactor = 1.0; if (speed 90) tempSwingFactor = 0.9; var tempLevelMultiplier = 1.0; if (playerLevel === 'beginner') tempLevelMultiplier = 0.95; else if (playerLevel === 'intermediate') tempLevelMultiplier = 1.0; else if (playerLevel === 'advanced') tempLevelMultiplier = 1.05; else if (playerLevel === 'professional') tempLevelMultiplier = 1.1; // Simplified style modifier for chart, assume 'medium' for 'allcourt' baseline var tempStyleMod = 5; if (playingStyle === 'baseliner' && desiredPower === 'high') tempStyleMod = 10; if (playingStyle === 'serveandvolley') tempStyleMod = -10; var recommended = (275 * tempSwingFactor * tempLevelMultiplier) + tempStyleMod; // Using intermediate values for demonstration recommended = Math.max(240, Math.min(320, recommended)); chartLabels.push(speed + ' km/h'); chartData.push(recommended); } updateChart(chartLabels, chartData); } function updateChart(labels, data) { var ctx = document.getElementById('weightSwingChart').getContext('2d'); // Destroy previous chart instance if it exists if (chartInstance) { chartInstance.destroy(); } if (labels.length === 0 || data.length === 0) { // Optionally clear canvas or show a message if no data ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); return; } chartInstance = new Chart(ctx, { type: 'line', data: { labels: labels, datasets: [{ label: 'Recommended Weight (g)', data: data, borderColor: '#004a99', backgroundColor: 'rgba(0, 74, 153, 0.2)', fill: true, tension: 0.4 // Makes the line slightly curved }] }, options: { responsive: true, maintainAspectRatio: true, scales: { y: { beginAtZero: false, title: { display: true, text: 'Recommended Unstrung Weight (grams)' } }, x: { title: { display: true, text: 'Player Swing Speed (km/h)' } } }, plugins: { legend: { display: true, position: 'top' }, title: { display: true, text: 'Estimated Racket Weight vs. Swing Speed' } } } }); } // — Helper function to load Chart.js dynamically if needed — // For this example, we assume Chart.js is available globally or included via CDN. // If not, you'd need to add it: // // — Reset Function — function resetCalculator() { document.getElementById('playerLevel').value = 'intermediate'; document.getElementById('playingStyle').value = 'baseliner'; document.getElementById('swingSpeed').value = '70'; document.getElementById('desiredPower').value = 'medium'; // Clear errors setErrorMessage('swingSpeed'); // Reset results display document.getElementById('mainResult').innerText = '–'; document.getElementById('weightFactor').innerText = '–'; document.getElementById('swingFactor').innerText = '–'; document.getElementById('styleModifier').innerText = '–'; // Clear chart if (chartInstance) { chartInstance.destroy(); chartInstance = null; } // Optionally redraw with default values or keep empty calculateRacketWeight(); // Recalculate to show defaults } // — Copy Results Function — function copyResults() { var mainResult = document.getElementById('mainResult').innerText; var weightFactor = document.getElementById('weightFactor').innerText; var swingFactor = document.getElementById('swingFactor').innerText; var styleModifier = document.getElementById('styleModifier').innerText; var playerLevel = document.getElementById('playerLevel').options[document.getElementById('playerLevel').selectedIndex].text; var playingStyle = document.getElementById('playingStyle').options[document.getElementById('playingStyle').selectedIndex].text; var swingSpeed = document.getElementById('swingSpeed').value; var desiredPower = document.getElementById('desiredPower').options[document.getElementById('desiredPower').selectedIndex].text; var copyText = "— Tennis Racket Weight Calculation — \n\n"; copyText += "Inputs:\n"; copyText += "- Playing Level: " + playerLevel + "\n"; copyText += "- Primary Playing Style: " + playingStyle + "\n"; copyText += "- Swing Speed: " + swingSpeed + " km/h\n"; copyText += "- Desired Power Level: " + desiredPower + "\n\n"; copyText += "Results:\n"; copyText += "Recommended Racket Weight: " + mainResult + "\n"; copyText += "—————————————–\n"; copyText += "Key Factors:\n"; copyText += "- Weight Adjustment Factor: " + weightFactor + "\n"; copyText += "- Swing Speed Factor: " + swingFactor + "\n"; copyText += "- Style Power Modifier: " + styleModifier + "\n\n"; copyText += "Formula: Based on player inputs to balance maneuverability, stability, and power."; // Use a temporary textarea to copy text var textArea = document.createElement("textarea"); textArea.value = copyText; textArea.style.position = "fixed"; // Avoid scrolling to bottom of page in MS Edge. textArea.style.top = 0; textArea.style.left = 0; textArea.style.width = '2em'; textArea.style.height = '2em'; textArea.style.padding = '0'; textArea.style.border = 'none'; textArea.style.outline = 'none'; textArea.style.boxShadow = 'none'; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied!' : 'Copy failed!'; // Optionally show a small confirmation message var tempAlert = document.createElement('div'); tempAlert.textContent = msg; tempAlert.style.cssText = 'position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); background-color: #004a99; color: white; padding: 15px; border-radius: 5px; z-index: 1000;'; document.body.appendChild(tempAlert); setTimeout(function(){ document.body.removeChild(tempAlert); }, 2000); } catch (err) { console.error('Unable to copy text.', err); // Optionally show error message var tempAlert = document.createElement('div'); tempAlert.textContent = 'Copy failed!'; tempAlert.style.cssText = 'position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%); background-color: #dc3545; color: white; padding: 15px; border-radius: 5px; z-index: 1000;'; document.body.appendChild(tempAlert); setTimeout(function(){ document.body.removeChild(tempAlert); }, 2000); } document.body.removeChild(textArea); } // Function to toggle FAQ answers function toggleFaq(element) { var p = element.nextElementSibling; if (p.style.display === "block") { p.style.display = "none"; } else { p.style.display = "block"; } } // Initial calculation on page load document.addEventListener('DOMContentLoaded', function() { calculateRacketWeight(); // Perform initial calculation with default values });

Leave a Comment