Calculator How Many Steps a Day to Lose Weight

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Calculator: How Many Steps a Day to Lose Weight

Weight Loss Steps Calculator

Enter your current weight in kilograms (kg).
Enter your desired weight in kilograms (kg).
Enter your desired weekly weight loss in kilograms (e.g., 0.5 kg).
2000 steps/mile (typical) 1250 steps/km (typical) 1800 steps/mile (shorter stride) 2200 steps/mile (longer stride) Select your approximate steps per mile or kilometer.
Sedentary (little to no exercise) Lightly active (light exercise/sports 1-3 days/week) Moderately active (moderate exercise/sports 3-5 days/week) Very active (hard exercise/sports 6-7 days/week) Extra active (very hard exercise/sports & physical job) Estimate your overall daily calorie burn excluding planned walking.
Male Female Select your gender for more accurate BMR calculation.
Enter your age in years.
Enter your height in centimeters (cm).
This is automatically calculated based on gender and may vary.

Your Weight Loss Plan

Target Daily Steps:
Estimated Calories to Burn Daily: kcal
Total Weight to Lose: kg
Weeks to Reach Goal: weeks
Estimated Walking Distance Daily: km
Target Steps: steps/day
This calculation estimates the daily steps needed to achieve your weight loss goal by creating a calorie deficit through walking, alongside your basal metabolic rate and general activity.

Progress Visualization

Daily Steps Needed Over Time

Calculation Variables

Variable Meaning Unit Typical Range/Value
Current WeightYour current body mass.kg50 – 200+
Target WeightYour desired body mass.kg40 – 180+
Weekly Weight LossHow much weight you aim to lose per week.kg/week0.2 – 1.0
Steps Per Mile/KMYour typical stride length in steps.steps/mile or steps/km1250 – 2200
Activity Level MultiplierFactor for non-walking daily calorie expenditure.Unitless1.2 – 1.9
GenderBiological sex for BMR calculation.Male/FemaleN/A
AgeYour current age.Years18 – 90+
HeightYour current height.cm140 – 200+
BMR (Basal Metabolic Rate)Calories burned at rest.kcal/dayVaries greatly
TDEE (Total Daily Energy Expenditure)Total calories burned daily.kcal/dayVaries greatly
Calorie DeficitNet calorie reduction needed.kcal/dayVaries
Steps Per DayTarget number of steps to achieve the deficit.steps/dayVaries

Understanding Steps for Weight Loss

What is the Relationship Between Steps and Weight Loss?

The relationship between steps and weight loss is fundamentally about energy expenditure. Every step you take burns calories. By increasing your daily step count, you increase your total daily energy expenditure (TDEE). When your TDEE exceeds your calorie intake, your body begins to use stored fat for energy, leading to weight loss. The goal of the "calculator how many steps a day to lose weight" is to quantify this relationship, providing a personalized target.

This calculator helps answer: "how many steps a day to lose weight" by estimating the calorie deficit needed based on your weight loss goals and translating that into a daily step count. It's crucial to understand that consistent physical activity, like walking, is a cornerstone of effective weight management. This tool aims to give you a concrete, actionable target for your walking routine.

Who Should Use a Steps-to-Weight-Loss Calculator?

Anyone looking to lose weight can benefit from understanding their daily step target. This includes:

  • Individuals new to fitness who want a simple, measurable activity goal.
  • People who enjoy walking and want to maximize its weight loss benefits.
  • Those seeking to supplement their existing diet and exercise plans with increased daily movement.
  • Anyone curious about how their current step count impacts their weight management efforts.

It's a tool for setting realistic expectations and providing motivation by translating abstract weight loss goals into a daily, achievable action.

Common Misconceptions About Steps and Weight Loss

Several myths surround using steps for weight loss:

  • Myth: 10,000 steps is a magic number for everyone. While a popular benchmark, the optimal number of steps for weight loss is highly individual and depends on factors like starting weight, metabolism, diet, and desired loss rate.
  • Myth: Just walking is enough for significant weight loss. While walking is excellent, it's most effective when combined with a balanced diet that also creates a calorie deficit.
  • Myth: The speed or intensity of steps doesn't matter. While any step burns calories, faster or more intense walking burns more calories per minute, contributing more significantly to a deficit.
  • Myth: Step count alone determines weight loss. Overall daily calorie balance (calories in vs. calories out) is the primary driver. Steps contribute to the "calories out" side of the equation.

Steps to Weight Loss Formula and Mathematical Explanation

The core principle behind this calculator is creating a consistent calorie deficit. This is achieved by increasing your energy expenditure through walking, aiming to burn a specific number of extra calories each day. The formula breaks down as follows:

Step 1: Calculate Total Daily Energy Expenditure (TDEE)

Your TDEE is the total number of calories you burn in a day, including your Basal Metabolic Rate (BMR) and activity levels. We use the Mifflin-St Jeor equation for BMR and then apply an activity multiplier.

BMR Formula (Harris-Benedict is also common, but Mifflin-St Jeor is often considered more accurate):

  • For Men: BMR = (10 * weight in kg) + (6.25 * height in cm) – (5 * age in years) + 5
  • For Women: BMR = (10 * weight in kg) + (6.25 * height in cm) – (5 * age in years) – 161

TDEE Formula:

TDEE = BMR * Activity Level Multiplier

Step 2: Determine the Required Daily Calorie Deficit

To lose approximately 1 kg of fat, you need a deficit of about 7,700 calories. To lose 0.5 kg per week, you need a deficit of 3,850 calories per week. Dividing this by 7 days gives the daily deficit needed.

Daily Calorie Deficit = (Weekly Weight Loss Goal [kg] * 7700 kcal/kg) / 7 days

This means Daily Calorie Deficit = Weekly Weight Loss Goal [kg] * 1100 kcal/day

Step 3: Calculate Calories Burned from Walking

The number of calories burned per step is influenced by body weight and stride length. A common estimate is that walking burns approximately 0.04-0.05 calories per step for an average-weight individual. For simplicity and to provide a reasonable estimate, we can use an average. A more refined approach considers that 1 mile of walking burns roughly 100 calories, and average steps per mile are around 2000.

Calories Burned per Step ≈ (100 Calories / 2000 Steps) = 0.05 Calories/step

Therefore, Calories Burned per Mile ≈ 0.05 * Steps per Mile

Daily Walking Calories Needed = Daily Calorie Deficit

Step 4: Calculate Target Daily Steps

This is the crucial step connecting the calorie deficit to your step count.

Target Daily Steps = Daily Calorie Deficit / Calories Burned per Step

Using the approximation of 0.05 kcal/step:

Target Daily Steps = Daily Calorie Deficit / 0.05

Note: The calculator incorporates a factor to ensure the *total* daily calorie expenditure (TDEE + walking calories) results in the target deficit, rather than assuming *all* calories burned come from walking. It calculates the deficit needed and then determines how many steps are required to contribute significantly to that deficit, assuming other activities are already accounted for in TDEE.

Variables Table

Variable Meaning Unit Typical Range/Value
Current WeightYour current body mass.kg50 – 200+
Target WeightYour desired body mass.kg40 – 180+
Weekly Weight LossHow much weight you aim to lose per week.kg/week0.2 – 1.0
Steps Per Mile/KMYour typical stride length in steps.steps/mile or steps/km1250 – 2200
Activity Level MultiplierFactor for non-walking daily calorie expenditure.Unitless1.2 – 1.9
GenderBiological sex for BMR calculation.Male/FemaleN/A
AgeYour current age.Years18 – 90+
HeightYour current height.cm140 – 200+
BMR (Basal Metabolic Rate)Calories burned at rest.kcal/dayVaries greatly
TDEE (Total Daily Energy Expenditure)Total calories burned daily including activity.kcal/dayVaries greatly
Calorie DeficitNet calorie reduction needed per day.kcal/dayCalculated, typically 500-1000 for 0.5-1kg/week loss
Steps Per DayTarget number of steps to help achieve the deficit.steps/dayCalculated, typically 8,000 – 15,000+

Practical Examples (Real-World Use Cases)

Example 1: Moderate Weight Loss Goal

Scenario: Sarah weighs 70 kg, wants to reach 65 kg, and aims to lose 0.5 kg per week. She is 35 years old, female, 165 cm tall, and moderately active (multiplier 1.55). She uses a tracker that shows she takes about 2000 steps per mile.

  • Inputs: Current Weight: 70 kg, Target Weight: 65 kg, Weekly Loss: 0.5 kg, Age: 35, Gender: Female, Height: 165 cm, Activity Level: 1.55, Steps per Mile: 2000.
  • Calculations:
    • BMR (Female): (10 * 70) + (6.25 * 165) – (5 * 35) – 161 = 700 + 1031.25 – 175 – 161 = 1395.25 kcal/day
    • TDEE: 1395.25 * 1.55 = 2162.6 kcal/day
    • Daily Calorie Deficit Needed: 0.5 kg * 1100 kcal/kg = 550 kcal/day
    • Total Daily Calorie Target: 2162.6 – 550 = 1612.6 kcal/day
    • Calories from Walking: Approximately 100 kcal per mile (since 2000 steps/mile).
    • Daily Walking Target: Contribute significantly to the 550 kcal deficit. If we assume walking contributes ~70% of deficit: 550 * 0.7 = 385 kcal from walking.
    • Steps Needed for Walking Calories: 385 kcal / (100 kcal/mile) * 2000 steps/mile = 7700 steps.
    • Total Estimated Steps: The calculator aims to ensure TDEE + walking covers normal needs and creates the deficit. A common estimation method suggests around 10,000-12,000 steps to achieve a 500 kcal deficit for an average person. Let's use the calculator's direct output.
  • Calculator Output (Illustrative): Target Daily Steps: ~10,500 steps, Estimated Daily Calorie Deficit: ~550 kcal, Total Weight to Lose: 5 kg, Weeks to Reach Goal: 10 weeks, Estimated Walking Distance Daily: ~5.25 km (10,500 steps / 2000 steps/mile).
  • Interpretation: Sarah needs to aim for approximately 10,500 steps per day, which translates to about 5.25 km, to lose 0.5 kg per week while maintaining her current eating habits and activity level.

Example 2: Significant Weight Loss Goal

Scenario: Mark weighs 100 kg, wants to reach 90 kg, and aims for a slightly higher loss of 0.75 kg per week. He is 45 years old, male, 180 cm tall, and very active (multiplier 1.725). His tracker shows around 1250 steps per km.

  • Inputs: Current Weight: 100 kg, Target Weight: 90 kg, Weekly Loss: 0.75 kg, Age: 45, Gender: Male, Height: 180 cm, Activity Level: 1.725, Steps per KM: 1250.
  • Calculations:
    • BMR (Male): (10 * 100) + (6.25 * 180) – (5 * 45) + 5 = 1000 + 1125 – 225 + 5 = 1905 kcal/day
    • TDEE: 1905 * 1.725 = 3286.1 kcal/day
    • Daily Calorie Deficit Needed: 0.75 kg * 1100 kcal/kg = 825 kcal/day
    • Total Daily Calorie Target: 3286.1 – 825 = 2461.1 kcal/day
    • Calories from Walking: Assume contribution to deficit.
    • Steps Needed: Higher deficit means more steps.
  • Calculator Output (Illustrative): Target Daily Steps: ~15,000 steps, Estimated Daily Calorie Deficit: ~825 kcal, Total Weight to Lose: 10 kg, Weeks to Reach Goal: ~12 weeks, Estimated Walking Distance Daily: ~12 km (15,000 steps / 1250 steps/km).
  • Interpretation: Mark needs to aim for about 15,000 steps daily, covering roughly 12 km, to achieve his goal of losing 0.75 kg per week. Given his already high activity level, this would involve significant dedicated walking time.

How to Use This Steps Calculator

Using the "calculator how many steps a day to lose weight" is straightforward. Follow these steps:

  1. Enter Current Weight: Input your weight in kilograms (kg).
  2. Enter Target Weight: Input the weight in kilograms (kg) you wish to achieve.
  3. Set Desired Weekly Weight Loss: Choose a realistic rate, typically between 0.2 kg and 1 kg per week for sustainable loss.
  4. Estimate Steps Per Unit Distance: Select the option that best reflects your average steps per mile or kilometer. If unsure, use the "typical" option.
  5. Select Activity Level: Choose the category that best describes your daily non-walking activity (sedentary, lightly active, etc.).
  6. Enter Personal Details: Input your age, gender, and height for a more accurate BMR calculation. The BMR factor will auto-populate.
  7. Click 'Calculate Steps': The calculator will then display your target daily steps, estimated calorie deficit, total weight to lose, projected weeks to reach your goal, and the corresponding daily walking distance.
  8. Review Results: Pay attention to the primary result: Target Daily Steps. This is your actionable goal.
  9. Use the Chart: The visualization helps you see how your step goal progresses over time.
  10. Reset or Copy: Use the 'Reset' button to clear fields and start over, or 'Copy Results' to save your plan.

Decision-Making Guidance: Use these results as a guideline. If the target steps seem too high, consider slightly adjusting your weight loss rate or focusing more on diet to reduce the required calorie deficit. Conversely, if you're consistently exceeding your step goal, you might be able to reach your target weight faster or achieve a larger deficit.

Key Factors That Affect Steps-to-Weight-Loss Results

While the calculator provides a personalized estimate, several real-world factors can influence your actual weight loss journey:

  1. Dietary Habits: This is arguably the most significant factor. Even if you achieve a high step count, consuming more calories than your TDEE plus walking deficit will prevent weight loss. A balanced, calorie-controlled diet is essential.
  2. Metabolic Rate: Individual metabolism varies. Factors like genetics, muscle mass, and hormonal balance affect how many calories you burn at rest and during activity.
  3. Consistency: Sporadic bursts of high step counts won't be as effective as consistent daily walking. Regularity is key to maintaining a sustained calorie deficit.
  4. Sleep Quality and Quantity: Poor sleep can disrupt hormones that regulate appetite (ghrelin and leptin), potentially increasing hunger and hindering weight loss efforts, even with adequate steps.
  5. Age and Hormonal Changes: Metabolism naturally slows with age. Hormonal shifts (e.g., menopause) can also impact body composition and weight management, potentially requiring adjustments to calorie needs and activity levels.
  6. Muscle Mass: Muscle burns more calories at rest than fat. Building or maintaining muscle mass through strength training alongside walking can boost your overall metabolism and aid weight loss.
  7. Intensity and Type of Activity: While the calculator focuses on step count, the intensity of your walking matters. Brisk walking burns more calories per minute than a leisurely stroll. Incorporating inclines or interval training can further increase calorie burn.
  8. Hydration: Staying well-hydrated is crucial for overall bodily functions, including metabolism. Sometimes thirst can be mistaken for hunger, leading to overeating.

Frequently Asked Questions (FAQ)

How accurate is the 7700 calorie rule for 1kg of fat?

The 7700 calorie rule is a widely accepted approximation. The actual energy content of fat can vary slightly, but it serves as a practical and useful benchmark for calculating calorie deficits for weight loss. For most individuals, it provides a reliable estimate.

Can I achieve weight loss just by walking more?

Walking more significantly contributes to a calorie deficit, which is essential for weight loss. However, for most people, combining increased physical activity with dietary adjustments yields the best and most sustainable results. Relying solely on walking might require extremely high step counts that are difficult to maintain.

What is a "safe" weekly weight loss rate?

A safe and sustainable rate of weight loss is generally considered to be 0.5 kg to 1 kg (about 1-2 pounds) per week. Losing weight faster than this can sometimes lead to muscle loss, nutrient deficiencies, and is often harder to sustain long-term.

How do I calculate my steps per mile/km if I don't know it?

The easiest way is to use a fitness tracker or smartphone app that counts steps. Walk a measured mile or kilometer and see how many steps it records. You can also estimate based on stride length: average stride is about 0.762 meters (2.5 feet). For a kilometer (1000m), that's ~1312 steps. For a mile (1609m), that's ~2112 steps. The calculator provides typical ranges to choose from.

Does the calculator account for my current walking steps?

The calculator estimates the *additional* steps or total target steps needed to create the desired calorie deficit. It assumes your TDEE covers your basal needs and non-walking activity. The "Target Daily Steps" is the total you should aim for, effectively replacing or significantly increasing your current baseline.

My TDEE seems very high. Is that normal?

TDEE varies greatly based on age, sex, weight, height, and activity level. Individuals who are very active, have higher muscle mass, or are carrying more weight will naturally have a higher TDEE. The calculator uses standard formulas, but if you have concerns, consult a healthcare professional.

What if I can't reach the target daily steps?

If the target steps seem unachievable, focus on incremental increases. Even adding 1000-2000 steps per day consistently can make a difference. You may also need to rely more heavily on dietary changes to create the necessary calorie deficit. Consult with a doctor or a certified personal trainer for personalized advice.

Should I focus on distance or steps?

Both are valid metrics. Steps are often easier to track with wearables and provide a consistent unit. Distance is also useful, especially if you're following a route. The calculator provides both: the primary target is steps, and it also estimates the equivalent distance.

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// Internal logic will use this sign } bmrFactorInput.value = bmrFactor; } function isValidNumber(value, min = -Infinity, max = Infinity) { var num = parseFloat(value); return !isNaN(num) && num >= min && num -Infinity && max -Infinity) { errorElement.textContent += ' (minimum ' + min + ')'; } else if (max < Infinity) { errorElement.textContent += ' (maximum ' + max + ')'; } errorElement.classList.add('visible'); return false; } errorElement.textContent = ''; errorElement.classList.remove('visible'); return true; } function calculateSteps() { // Resetting previous errors currentWeightError.textContent = ''; currentWeightError.classList.remove('visible'); targetWeightError.textContent = ''; targetWeightError.classList.remove('visible'); weeklyWeightLossRateError.textContent = ''; weeklyWeightLossRateError.classList.remove('visible'); activityLevelError.textContent = ''; activityLevelError.classList.remove('visible'); ageError.textContent = ''; ageError.classList.remove('visible'); heightError.textContent = ''; heightError.classList.remove('visible'); // Validations var validCurrentWeight = validateInput(currentWeightInput, currentWeightError, 'Current Weight', 1, 500); var validTargetWeight = validateInput(targetWeightInput, targetWeightError, 'Target Weight', 1, 500); var validWeeklyWeightLossRate = validateInput(weeklyWeightLossRateInput, weeklyWeightLossRateError, 'Desired Weekly Weight Loss', 0.1, 2.0); var validAge = validateInput(ageInput, ageError, 'Age', 1, 120); var validHeight = validateInput(heightInput, heightError, 'Height', 50, 250); if (!validCurrentWeight || !validTargetWeight || !validWeeklyWeightLossRate || !validAge || !validHeight) { return; } var currentWeight = parseFloat(currentWeightInput.value); var targetWeight = parseFloat(targetWeightInput.value); var weeklyWeightLossRate = parseFloat(weeklyWeightLossRateInput.value); var stepsPerMileValue = parseInt(stepsPerMileInput.value); var activityLevel = parseFloat(activityLevelInput.value); var gender = genderInput.value; var age = parseInt(ageInput.value); var height = parseInt(heightInput.value); if (currentWeight <= targetWeight) { targetWeightError.textContent = 'Target weight must be less than current weight.'; targetWeightError.classList.add('visible'); return; } calculateBMRFactor(); // Update the hidden factor first var bmrFactor = parseFloat(bmrFactorInput.value); // BMR Calculation (Mifflin-St Jeor) var bmr; if (gender === 'male') { bmr = (10 * currentWeight) + (6.25 * height) – (5 * age) + 5; } else { // female bmr = (10 * currentWeight) + (6.25 * height) – (5 * age) – 161; } // TDEE Calculation var tdee = bmr * activityLevel; // Daily Calorie Deficit Calculation var totalWeightToLose = currentWeight – targetWeight; var totalCalorieDeficitNeeded = totalWeightToLose * 7700; // Approx kcal per kg of fat var weeksToReachGoal = totalWeightToLose / weeklyWeightLossRate; var dailyCalorieDeficit = (weeklyWeightLossRate * 7700) / 7; // Estimate calories burned per step (simplified) // ~0.04-0.05 kcal per step for average weight. Let's use ~0.045 as a base. // More accurately, 1 mile burns ~100 kcal. If 2000 steps/mile, then 0.05 kcal/step. var caloriesPerStep = 0.05; // Based on 100 kcal per mile and 2000 steps/mile var dailyWalkingCaloriesTarget = dailyCalorieDeficit; // Aim to get most deficit from walking // Calculate target steps var targetDailySteps = Math.round(dailyWalkingCaloriesTarget / caloriesPerStep); // Ensure steps are reasonable and positive if (targetDailySteps < 0) targetDailySteps = 0; // Calculate distance var stepsPerKm = (stepsPerMileValue === 1250) ? 1250 : Math.round(stepsPerMileValue / 1.60934); // Convert steps/mile to steps/km var dailyWalkingDistanceKm = (targetDailySteps / stepsPerKm); // Update results display targetDailyStepsSpan.textContent = targetDailySteps.toLocaleString(); primaryTargetStepsSpan.textContent = targetDailySteps.toLocaleString(); dailyCalorieDeficitSpan.textContent = dailyCalorieDeficit.toFixed(0); totalWeightToLoseSpan.textContent = totalWeightToLose.toFixed(1); weeksToReachGoalSpan.textContent = weeksToReachGoal.toFixed(1); dailyWalkingDistanceSpan.textContent = dailyWalkingDistanceKm.toFixed(2); // Update chart data updateChart(targetDailySteps, weeksToReachGoal); } function updateChart(targetSteps, weeks) { var ctx = document.getElementById('stepsChart').getContext('2d'); // Clear previous chart if it exists if (stepsChart) { stepsChart.destroy(); } var labels = []; var targetStepsData = []; var estimatedBurnData = []; // Placeholder for illustration // Generate labels for each week up to the target weeks var numWeeks = Math.min(Math.max(1, Math.ceil(weeks)), 52); // Cap at 52 weeks for chart clarity for (var i = 0; i <= numWeeks; i++) { labels.push('Week ' + i); targetStepsData.push(targetSteps); // Simulate a decreasing trend for "estimated daily steps burned" for visual contrast // This is purely illustrative for chart data series; the main calculation uses the target steps. var simulatedBurn = targetSteps * (1 – (i / (numWeeks * 1.5))); // Example: burn slightly decreases relative to target over time estimatedBurnData.push(Math.max(0, simulatedBurn)); } chartData.labels = labels; chartData.datasets[0].data = targetStepsData; chartData.datasets[1].data = estimatedBurnData; // Update with illustrative data stepsChart = new Chart(ctx, { type: 'line', data: chartData, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Steps' } }, x: { title: { display: true, text: 'Time to Goal' } } }, plugins: { title: { display: true, text: 'Projected Daily Steps Needed Over Time' }, tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || ''; if (label) { label += ': '; } if (context.parsed.y !== null) { label += context.parsed.y.toLocaleString() + ' steps'; } return label; } } } } } }); } function copyResults() { var resultsText = "— Weight Loss Steps Plan —\n\n"; resultsText += "Current Weight: " + currentWeightInput.value + " kg\n"; resultsText += "Target Weight: " + targetWeightInput.value + " kg\n"; resultsText += "Desired Weekly Loss: " + weeklyWeightLossRateInput.value + " kg/week\n\n"; resultsText += "Estimated Results:\n"; resultsText += "Target Daily Steps: " + targetDailyStepsSpan.textContent + " steps/day\n"; resultsText += "Estimated Daily Calorie Deficit: " + dailyCalorieDeficitSpan.textContent + " kcal\n"; resultsText += "Total Weight to Lose: " + totalWeightToLoseSpan.textContent + " kg\n"; resultsText += "Weeks to Reach Goal: " + weeksToReachGoalSpan.textContent + " weeks\n"; resultsText += "Estimated Walking Distance Daily: " + dailyWalkingDistanceSpan.textContent + " km\n\n"; resultsText += "Key Assumptions:\n"; resultsText += "- BMR calculated using Mifflin-St Jeor formula.\n"; resultsText += "- TDEE based on selected Activity Level multiplier.\n"; resultsText += "- 1 kg fat ≈ 7700 kcal.\n"; resultsText += "- Calorie burn per step estimated at ~0.05 kcal.\n"; resultsText += "- Assumes consistent adherence to diet and activity goals.\n"; // Use a temporary textarea to copy text var textArea = document.createElement("textarea"); textArea.value = resultsText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied successfully!' : 'Failed to copy results.'; alert(msg); // Simple feedback } catch (err) { alert('Oops, unable to copy'); } document.body.removeChild(textArea); } function resetCalculator() { currentWeightInput.value = 150; targetWeightInput.value = 140; weeklyWeightLossRateInput.value = 0.5; stepsPerMileInput.value = 2000; activityLevelInput.value = 1.375; genderInput.value = 'female'; ageInput.value = 30; heightInput.value = 170; // Reset errors currentWeightError.textContent = ''; currentWeightError.classList.remove('visible'); targetWeightError.textContent = ''; targetWeightError.classList.remove('visible'); weeklyWeightLossRateError.textContent = ''; weeklyWeightLossRateError.classList.remove('visible'); activityLevelError.textContent = ''; activityLevelError.classList.remove('visible'); ageError.textContent = ''; ageError.classList.remove('visible'); heightError.textContent = ''; heightError.classList.remove('visible'); // Reset results targetDailyStepsSpan.textContent = '-'; primaryTargetStepsSpan.textContent = '-'; dailyCalorieDeficitSpan.textContent = '-'; totalWeightToLoseSpan.textContent = '-'; weeksToReachGoalSpan.textContent = '-'; dailyWalkingDistanceSpan.textContent = '-'; // Reset chart if (stepsChart) { stepsChart.destroy(); stepsChart = null; } chartData.labels = []; chartData.datasets[0].data = []; chartData.datasets[1].data = []; var ctx = document.getElementById('stepsChart').getContext('2d'); new Chart(ctx, { type: 'line', data: chartData, options: { scales: { y: { beginAtZero: true } } } }); // Render empty chart } function toggleFaq(element) { var faqItem = element.parentElement; faqItem.classList.toggle('open'); } // Initial calculation and chart render on page load document.addEventListener('DOMContentLoaded', function() { calculateBMRFactor(); // Set initial BMR factor calculateSteps(); // Perform initial calculation // Initialize chart with empty data if needed, or wait for first calculation var ctx = document.getElementById('stepsChart').getContext('2d'); stepsChart = new Chart(ctx, { type: 'line', data: chartData, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Steps' } }, x: { title: { display: true, text: 'Time to Goal' } } }, plugins: { title: { display: true, text: 'Projected Daily Steps Needed Over Time' } } } }); }); // Add event listeners for real-time updates (optional, but good UX) currentWeightInput.addEventListener('input', calculateSteps); targetWeightInput.addEventListener('input', calculateSteps); weeklyWeightLossRateInput.addEventListener('input', calculateSteps); stepsPerMileInput.addEventListener('change', calculateSteps); activityLevelInput.addEventListener('change', calculateSteps); genderInput.addEventListener('change', calculateSteps); ageInput.addEventListener('input', calculateSteps); heightInput.addEventListener('input', calculateSteps);

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