Wine Calculator

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Advanced Wine Aging Calculator

Wine Aging Potential Calculator

Enter the details of your wine to estimate its optimal aging window and peak drinkability.

Red Wine White Wine Rosé Wine Sparkling Wine Fortified Wine Select the general category of your wine.
Higher scores (e.g., 7-10) indicate better aging potential.
Very Low Low Moderate-Low Medium Moderate-High High Very High For reds, higher tannins (e.g., 5-7) are crucial for aging. Whites typically have lower tannin impact.
Alcohol acts as a preservative. Higher levels (e.g., 12.5%+) generally help aging.
Sugar acts as a preservative, especially important in sweeter wines.
Lower pH (higher acidity) generally aids aging. Typical range is 3.2-3.7 for reds, 3.0-3.5 for whites.
Cool, stable temperatures (10-15°C) are ideal. Higher temps accelerate aging, potentially negatively.

Aging Potential Results

Base Potential (Years)
Temperature Adjustment
Estimated Peak Window
Tannin Impact Factor
Formula: Base Potential * Temp Factor * Tannin Factor = Peak Window. These are estimations.

Aging Trajectory Simulation

Simulates hypothetical flavor development and aging curve based on inputs.

Yearly Breakdown & Drinkability Window

Year Stage Notes

What is Wine Aging Potential?

Wine aging potential refers to a wine's capacity to improve in quality and complexity over time when stored under proper conditions. Not all wines are built to last; many are designed for immediate enjoyment. However, certain wines possess the structural components—like acidity, tannins, sugar, and alcohol—that allow them to evolve, developing nuanced aromas and flavors over years, or even decades. Understanding the wine aging potential helps collectors, enthusiasts, and investors decide whether to drink a bottle now or cellar it for future enjoyment. This involves assessing the wine's components and how they interact during maturation. The goal of calculating wine aging potential is to identify that sweet spot where a wine is at its most expressive and enjoyable.

Who should use a wine aging calculator?

  • Collectors: To manage their cellar and know when to drink their valuable bottles.
  • Enthusiasts: To better understand the wines they enjoy and experiment with cellaring.
  • Investors: To identify wines with potential for appreciation through aging.
  • New Wine Buyers: To make informed decisions about whether a purchase is for immediate consumption or long-term cellaring.

Common misconceptions about wine aging:

  • All expensive wines age well: Price does not always correlate with aging potential. Some high-priced wines are meant to be consumed young.
  • Red wine always ages better than white wine: While many robust reds have excellent aging potential, certain complex white wines (like Riesling, Chardonnay, Sauternes) can age beautifully for decades.
  • Aging automatically makes wine better: Wine aging is a delicate process. Wines can peak and then decline. Over-aging can lead to flat, oxidized flavors. Proper storage is paramount.
  • You can age any wine indefinitely: Most wines have a finite aging window. Only a small percentage of wines are truly built for very long-term aging (20+ years).

Wine Aging Potential Formula and Mathematical Explanation

The calculation for wine aging potential is not a single, universally standardized formula like a mortgage payment. Instead, it's an estimation based on the interplay of key structural components and environmental factors. Our calculator uses a multi-factor approach to provide a nuanced estimate:

Core Calculation:

Estimated Peak Window (Years) = Base Potential Age (Years) * Temperature Adjustment Factor * Tannin/Structure Factor

Let's break down each component:

  1. Base Potential Age: This is an initial estimate derived primarily from the wine type, acidity, and residual sugar. Wines with naturally high acidity and/or sugar get a higher base score. A very basic red with low acidity might have a base of 1-3 years, while a high-acid white or a sweet dessert wine could start with a base of 5-10 years.
  2. Temperature Adjustment Factor: Storage temperature significantly impacts the rate of aging. Cooler, stable temperatures slow down chemical reactions, extending the aging window beneficially. Warmer temperatures accelerate aging, often leading to premature decline.
    • Ideal (10-13°C): Factor ≈ 1.0
    • Slightly Warm (14-16°C): Factor ≈ 0.7-0.8
    • Warm (17-18°C): Factor ≈ 0.5-0.6
    • Cool (5-9°C): Factor ≈ 1.1-1.2 (can slow aging but preserves well)
  3. Tannin/Structure Factor: Tannins (primarily in red wines), alcohol, and pH (acidity) are key preservatives and structural elements.
    • Tannins: High tannins act as antioxidants and provide structure, allowing reds to age longer. Low tannins in reds suggest shorter aging.
    • Alcohol: Higher alcohol content (above ~12.5%) contributes to preservation.
    • pH: Lower pH (higher acidity) also acts as a preservative.
    This factor is a composite score derived from tannin level, alcohol content, and pH. High levels of these components result in a factor closer to 1.0 or slightly higher, indicating better structure for aging. Low levels might result in a factor of 0.5-0.8. For white wines, the tannin input is less critical, and acidity (pH, Acidity Score) plays a more dominant role.

Variable Explanations Table

Variable Name Meaning Unit Typical Range
Wine Type General classification (Red, White, Rosé, etc.) Category Red, White, Rosé, Sparkling, Fortified
Acidity Score Measure of tartness, crucial for preservation and structure 1-10 Scale 1 (Low) – 10 (High)
Tannin Level Astringent compounds, mainly in red wines, acting as preservatives 1-7 Scale 1 (Very Low) – 7 (Very High)
Alcohol Content Alcohol by volume, acts as a preservative % ABV 5.0% – 20.0%
Residual Sugar Unfermented grape sugars, acts as a preservative g/L 0 g/L – 200+ g/L
pH Level Inverse measure of acidity (lower pH = higher acidity) pH Units 2.80 – 4.00
Storage Temperature Average temperature where the wine is kept °C 5°C – 18°C
Base Potential Age Initial estimate based on inherent structure Years 1 – 15+
Temperature Adjustment Factor Multiplier based on storage temp Decimal 0.5 – 1.2
Tannin/Structure Factor Multiplier based on tannins, alcohol, pH Decimal 0.5 – 1.1
Estimated Peak Window Final calculated range for optimal drinking Years 1 – 30+

Practical Examples (Real-World Use Cases)

Example 1: Age-Worthy Bordeaux Blend

Scenario: A collector has a bottle of a classic Bordeaux blend from a reputable producer. They want to know its wine aging potential.

Inputs:

  • Wine Type: Red Wine
  • Acidity Score: 8
  • Tannin Level: 6 (High)
  • Alcohol Content: 13.5%
  • Residual Sugar: 1.5 g/L
  • pH Level: 3.55
  • Average Storage Temperature: 13°C

Calculator Output:

  • Base Potential Age: 8 years
  • Temperature Adjustment Factor: 1.0
  • Tannin/Structure Factor: 0.95
  • Estimated Peak Window: 7.6 Years (Calculated as 8 * 1.0 * 0.95)
  • Estimated Drinkability: Years 5 to 12 from vintage.

Financial Interpretation: This Bordeaux has significant aging potential due to its high tannins, good acidity, and classic structure. Stored at an ideal temperature, it's likely to evolve positively for many years. The collector might consider opening the first bottle around year 5-7 to assess its development and plan to enjoy it through year 10-12, while holding onto other bottles for potentially longer. This information helps maximize the enjoyment and potential value of their cellar.

Example 2: Crisp German Riesling

Scenario: Someone purchased a dry German Riesling and wants to understand if it's best enjoyed now or can benefit from aging.

Inputs:

  • Wine Type: White Wine
  • Acidity Score: 9
  • Tannin Level: 1 (Very Low – negligible for white)
  • Alcohol Content: 11.5%
  • Residual Sugar: 8.0 g/L
  • pH Level: 3.15
  • Average Storage Temperature: 14°C

Calculator Output:

  • Base Potential Age: 7 years
  • Temperature Adjustment Factor: 0.8 (Slightly warmer storage)
  • Tannin/Structure Factor: 0.85 (Based on acidity, alcohol, sugar)
  • Estimated Peak Window: ~4.8 Years (Calculated as 7 * 0.8 * 0.85)
  • Estimated Drinkability: Years 2 to 7 from vintage.

Financial Interpretation: While this Riesling has excellent acidity and some residual sugar contributing to its structure, the lower alcohol and moderate storage temperature suggest a moderate aging curve. It might be enjoyable now, showing primary fruit, but will likely develop more complex petrol and honey notes over the next few years. The calculator suggests holding for 2-5 more years for peak complexity, rather than decades. This informs the decision on whether to consume it soon or cellar it for a few years to experience its evolution. Proper cellaring is key for this kind of wine aging potential.

How to Use This Wine Aging Calculator

Using the Advanced Wine Aging Calculator is straightforward and designed to provide actionable insights into your wine's future. Follow these steps:

  1. Select Wine Type: Choose the category that best fits your wine (Red, White, Rosé, Sparkling, Fortified). This sets a baseline for the calculation.
  2. Input Key Parameters:
    • Acidity Score (1-10): Rate the perceived tartness or brightness. Higher is generally better for aging.
    • Tannin Level (1-7 for Reds): Assess the drying, astringent sensation (mostly for red wines). Higher tannins provide structure. Select 'Very Low' for whites/rosés.
    • Alcohol Content (%): Enter the alcohol by volume. Higher alcohol acts as a preservative.
    • Residual Sugar (g/L): Input the grams per liter of unfermented sugar. Sugar is a preservative.
    • pH Level: Enter the pH value. Lower pH (higher acidity) enhances aging.
    • Storage Temperature (°C): Specify the average temperature of your wine storage. Cooler and stable is best.
  3. Click 'Calculate Aging': Once all relevant fields are filled, press the button.

Interpreting the Results:

  • Main Result (Estimated Peak Window): This is the core output, representing the estimated number of years the wine will likely be at its best. It's shown as a range (e.g., "Years 5-10").
  • Intermediate Values:
    • Base Potential Age: The starting point before adjustments.
    • Temperature Adjustment Factor: Shows how storage temperature impacts the potential.
    • Tannin/Structure Factor: Reflects the contribution of tannins, alcohol, and pH.
    • Tannin Impact Factor: Specifically highlights the role of tannins (more relevant for reds).
  • Yearly Breakdown & Drinkability Window Table: This table provides a stage-by-stage view of the wine's likely evolution:
    • Young: Primary fruit aromas and flavors dominate.
    • Developing: Secondary aromas (e.g., oak, toast) emerge, tannins soften.
    • Peak: Optimal balance of fruit, tertiary aromas (e.g., earth, leather), and structure.
    • Mature: Tertiary aromas are prominent, fruit fades, tannins are resolved.
    • Deteriorating: Wine losing freshness, flavors becoming muted or oxidized.
  • Aging Trajectory Simulation Chart: Visualizes the hypothetical journey of the wine's complexity and structure over time.

Decision-Making Guidance:

  • Drink Now vs. Cellar: If the peak window is starting now or has passed, consider drinking the wine soon. If the window is in the future, cellar it.
  • Cellaring Duration: The calculated window helps you decide how long to hold onto the wine.
  • Comparing Wines: Use the calculator to compare the wine aging potential of different bottles in your collection.
  • Storage Optimization: The temperature factor highlights the importance of consistent, cool storage.

Key Factors That Affect Wine Aging Potential

Several critical factors influence how well a wine ages. Understanding these helps refine your assessment of wine aging potential:

  1. Acidity: This is perhaps the single most important structural component for aging, especially in white wines. Acidity acts as a natural preservative, preventing spoilage and maintaining freshness. Wines with high acidity, like Riesling or Champagne, often age exceptionally well. Low acidity wines are generally best consumed young.
  2. Tannins: Primarily found in red wines, tannins are phenolic compounds derived from grape skins, seeds, and stems (and oak aging). They provide structure, a drying sensation in the mouth, and act as powerful antioxidants. Wines with high tannin levels, like Nebbiolo or Cabernet Sauvignon, typically require significant aging to soften and integrate, often leading to long-lived wines.
  3. Alcohol Content: Alcohol acts as a preservative by inhibiting microbial growth. Wines with higher alcohol levels (generally above 12.5-13%) tend to have better stability and longevity compared to those with very low alcohol content. However, alcohol alone isn't sufficient for great aging; it works in synergy with other components.
  4. Residual Sugar: Sugar is a natural preservative. Wines with significant residual sugar, such as Sauternes, Port, or Late Harvest Rieslings, often possess remarkable aging capabilities. The sugar content helps to stabilize the wine and counterbalance other elements, allowing for decades of evolution.
  5. pH Level (Acidity Inverse): While we often talk about acidity, pH measures it quantitatively. A lower pH signifies higher acidity. For aging, a lower pH (e.g., below 3.3 for reds, below 3.1 for whites) is generally more beneficial, indicating a more stable, acidic environment that slows down degradation processes.
  6. Winemaking Techniques & Additions: Beyond the natural components, how the wine is made matters. Oak aging can introduce tannins and antioxidants, influencing longevity. Practices like extended maceration (for reds) or lees contact (for whites) can also add complexity and improve a wine's structure for aging. Sulfites, while controversial, are often used in small amounts as an antioxidant and preservative, aiding in aging.
  7. Storage Conditions: This cannot be overstated. Consistent, cool temperatures (ideally 10-15°C or 50-59°F), moderate humidity (around 70%), protection from light, and minimal vibration are crucial. Fluctuations in temperature cause expansion and contraction, potentially damaging the cork seal and leading to oxidation. This significantly impacts the realized wine aging potential.

Frequently Asked Questions (FAQ)

Q1: Does all red wine age better than white wine?

A1: No, this is a common misconception. While many full-bodied red wines with high tannins and acidity are built for aging, certain white wines, particularly those with high acidity and/or residual sugar (like German Riesling, Chenin Blanc, or sweet wines like Sauternes), can age exceptionally well, often for longer periods than many reds.

Q2: What is the ideal storage temperature for aging wine?

A2: The ideal temperature for long-term wine aging is consistently between 10°C and 15°C (50°F and 59°F). Cooler temperatures slow down the aging process, preserving the wine's freshness, while slightly warmer temperatures (up to 18°C/64°F) can accelerate aging but should be stable. Avoid temperatures above 20°C (68°F), as they can "cook" the wine.

Q3: Can I age wine simply by keeping it in a cool basement?

A3: A cool basement can be adequate if the temperature is stable and relatively low. However, other factors like humidity (ideally around 70% to keep corks moist), light exposure (UV light can damage wine), and vibration also play significant roles. A dedicated wine fridge or cellar offers more controlled conditions for optimal wine aging potential.

Q4: How do tannins affect wine aging?

A4: Tannins are compounds found primarily in red wine's skins, seeds, and stems. They act as natural preservatives and antioxidants, similar to how they preserve fruit in jams. They also provide structure and a drying sensation. As wine ages, tannins polymerize (link together), soften, and become less astringent, contributing to a smoother texture and allowing complex tertiary aromas to develop.

Q5: What does 'peak drinkability' mean for a wine?

A5: Peak drinkability refers to the period when a wine is considered to be at its best, offering optimal balance, complexity, and harmony between its fruit, acidity, tannins (for reds), and developed tertiary aromas (like earth, leather, tobacco, forest floor). Before its peak, a wine might be too primary or tannic; after its peak, it may start to lose freshness and vibrancy.

Q6: My wine is 20 years old. Should I drink it now?

A6: It depends entirely on the wine! A robust Cabernet Sauvignon, Barolo, or a sweet Sauternes from a good vintage might still be developing or at its peak. A lighter-bodied Pinot Noir or a simple rosé from 20 years ago is likely past its prime. Our calculator can give you a baseline estimate, but consider the wine's origin, vintage, and the specific factors you input.

Q7: How does residual sugar impact aging?

A7: Residual sugar acts as a preservative, much like salt in food. Higher sugar levels help inhibit spoilage microorganisms and contribute to the wine's stability and longevity. Sweet wines, therefore, often have excellent aging potential, allowing them to develop complex secondary and tertiary characteristics over decades.

Q8: Can this calculator predict the value of my aged wine?

A8: This calculator primarily estimates the optimal drinking window based on structural components and storage conditions. It does not directly assess market value, which is influenced by rarity, producer reputation, vintage conditions, provenance, and current market demand. However, understanding a wine's aging potential is a crucial first step in assessing its potential value.

Related Tools and Internal Resources

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} function getSelectValue(id, defaultValue = ") { var select = document.getElementById(id); return select.value || defaultValue; } function updateCalculator() { // This function can be used for real-time updates if needed, // but the main calculation is triggered by the button click. // We'll call it initially to set default values if they are not hardcoded. calculateAging(); // Trigger calculation on input change for real-time feel } function calculateAging() { // — Input Validation — var isValid = true; isValid = validateInput('acidityScore', 1, 10, 'acidityScoreError') && isValid; isValid = validateInput('alcoholContent', 5, 20, 'alcoholContentError') && isValid; isValid = validateInput('sugarLevel', 0, 200, 'sugarLevelError') && isValid; isValid = validateInput('phLevel', 2.8, 4.0, 'phLevelError') && isValid; isValid = validateInput('storageTemp', 5, 18, 'storageTempError') && isValid; if (!isValid) { document.getElementById('mainResult').textContent = "Enter Valid Data"; // Clear intermediate results and table/chart document.getElementById('intermediateBaseAge').textContent = '–'; document.getElementById('intermediateTempFactor').textContent = '–'; document.getElementById('intermediatePeakYears').textContent = '–'; document.getElementById('intermediateTanninImpact').textContent = '–'; clearTable(); clearChart(); return; } // — Get Input Values — var wineType = getSelectValue('wineType'); var acidityScore = getInputValue('acidityScore'); var tanninLevel = getInputValue('tanninLevel'); var alcoholContent = getInputValue('alcoholContent'); var sugarLevel = getInputValue('sugarLevel'); var phLevel = getInputValue('phLevel'); var storageTemp = getInputValue('storageTemp'); // — Base Potential Age Calculation (Simplified Logic) — var basePotentialAge = 5; // Default base for a decent wine // Adjust base based on wine type and acidity if (wineType === 'red') { basePotentialAge = 4 + (acidityScore * 0.5); if (tanninLevel >= 5) basePotentialAge += 2; // High tannins boost if (alcoholContent >= 13) basePotentialAge += 1; } else if (wineType === 'white') { basePotentialAge = 3 + (acidityScore * 0.7); if (phLevel = 10) basePotentialAge += 1; // Sugar helps white too } else if (wineType === 'rose') { basePotentialAge = 3 + (acidityScore * 0.5); if (alcoholContent >= 12.5) basePotentialAge += 0.5; } else if (wineType === 'sparkling') { basePotentialAge = 6 + (acidityScore * 0.6); // High acidity is key if (sugarLevel >= 15) basePotentialAge += 1; // Dosage matters } else if (wineType === 'fortified') { basePotentialAge = 10 + (sugarLevel * 0.1); // Sugar and alcohol are primary basePotentialAge += (alcoholContent – 15) * 0.5; // Higher alcohol helps } basePotentialAge = Math.max(1, basePotentialAge); // Ensure minimum base age // — Temperature Adjustment Factor — var tempFactor = 1.0; // Default for ideal temp if (storageTemp > 15) { tempFactor = 1.0 – ((storageTemp – 15) / 5); // Linear decrease } else if (storageTemp < 12) { tempFactor = 1.0 + ((12 – storageTemp) / 5); // Linear increase for cooler } tempFactor = Math.max(0.5, Math.min(1.2, tempFactor)); // Clamp factor // — Tannin/Structure Factor — var structureFactor = 0.7; // Default if (wineType === 'red') { structureFactor = (tanninLevel * 0.1) + (alcoholContent * 0.03) + ((4.0 – phLevel) * 0.5); } else { // For whites, roses, etc. – focus on acidity and sugar structureFactor = (acidityScore * 0.1) + (alcoholContent * 0.03) + ((4.0 – phLevel) * 0.5) + (sugarLevel * 0.005); } // Adjust factor based on type: Fortified has high structure naturally if (wineType === 'fortified') { structureFactor = 1.0; // Override with high structure } else if (wineType === 'sparkling') { structureFactor = (acidityScore * 0.15) + (alcoholContent * 0.02) + ((4.0 – phLevel) * 0.6); // Acidity paramount } structureFactor = Math.max(0.5, Math.min(1.1, structureFactor)); // Clamp factor // — Final Calculation — var estimatedPeakYears = basePotentialAge * tempFactor * structureFactor; // Determine peak window (e.g., +/- 2 years from the calculated peak) var minPeak = Math.max(1, Math.round(estimatedPeakYears – 2)); var maxPeak = Math.round(estimatedPeakYears + 2); // Rounding and formatting var formattedPeakYears = minPeak === maxPeak ? `${minPeak} Year` : `Years ${minPeak}-${maxPeak}`; // — Display Results — document.getElementById('mainResult').textContent = formattedPeakYears; document.getElementById('intermediateBaseAge').textContent = basePotentialAge.toFixed(1); document.getElementById('intermediateTempFactor').textContent = tempFactor.toFixed(2); document.getElementById('intermediatePeakYears').textContent = formattedPeakYears; document.getElementById('intermediateTanninImpact').textContent = structureFactor.toFixed(2); // — Update Table and Chart — updateAgingTable(basePotentialAge, tempFactor, structureFactor, estimatedPeakYears, wineType); updateAgingChart(estimatedPeakYears, minPeak, maxPeak); } function updateAgingTable(baseAge, tempFactor, structureFactor, calculatedPeak, wineType) { var tableBody = document.getElementById('agingTable').getElementsByTagName('tbody')[0]; tableBody.innerHTML = ''; // Clear previous rows var stages = { 'young': { label: 'Young', minYear: 0, maxYear: Math.max(1, Math.round(calculatedPeak * 0.3)) }, 'developing': { label: 'Developing', minYear: stages.young.maxYear + 1, maxYear: Math.round(calculatedPeak * 0.7) }, 'peak': { label: 'Peak', minYear: stages.developing.maxYear + 1, maxYear: Math.min(30, Math.round(calculatedPeak * 1.1) + 2) }, // Extend peak slightly 'mature': { label: 'Mature', minYear: stages.peak.maxYear + 1, maxYear: Math.min(40, Math.round(calculatedPeak * 1.5)) }, 'deteriorating': { label: 'Deteriorating', minYear: stages.mature.maxYear + 1, maxYear: 50 } // Arbitrary upper limit }; // Adjust stages for fortified wines if (wineType === 'fortified') { stages = { 'young': { label: 'Young', minYear: 0, maxYear: 5 }, 'developing': { label: 'Developing', minYear: 6, maxYear: 15 }, 'peak': { label: 'Peak', minYear: 16, maxYear: 30 }, 'mature': { label: 'Mature', minYear: 31, maxYear: 50 }, 'deteriorating': { label: 'Deteriorating', minYear: 51, maxYear: 70 } }; } else if (wineType === 'sparkling') { stages.peak.maxYear = Math.min(15, Math.round(calculatedPeak * 1.2) + 1); // Sparkling peaks earlier stages.mature.maxYear = Math.min(25, Math.round(calculatedPeak * 1.6)); stages.deteriorating.maxYear = 35; } var currentYear = 0; for (var stage in stages) { var stageData = stages[stage]; var startYear = Math.max(currentYear, stageData.minYear); var endYear = stageData.maxYear; // Add a row for the start of the stage if (startYear = stages.deteriorating.maxYear) break; // Stop if we've covered the full range } // Ensure at least a few rows are shown even if calculation is very short if (tableBody.rows.length < 3) { var row = tableBody.insertRow(); row.insertCell(0).textContent = "N/A"; row.insertCell(1).textContent = "Insufficient Data"; row.insertCell(2).textContent = "Unable to generate breakdown."; } } function updateAgingChart(estimatedPeakYears, minPeak, maxPeak) { var ctx = document.getElementById('agingChart').getContext('2d'); // Destroy previous chart instance if it exists if (chartInstance) { chartInstance.destroy(); } // Simplified data points for the chart simulation var dataPoints = []; var maxChartYear = Math.max(maxPeak + 5, 20); // Chart up to peak + buffer or 20 years // Simulate curve: Starts low, rises to peak, then declines for (var i = 0; i <= maxChartYear; i++) { var complexity = 0; if (i = estimatedPeakYears && i <= maxPeak) { // Peak phase – maintain high complexity complexity = 5; } else { // Declining phase – gradual decrease complexity = 5 – ((i – maxPeak) * 0.2); complexity = Math.max(0, complexity); // Don't go below 0 } dataPoints.push({ x: i, y: complexity }); } // Add peak window markers var peakWindowData = []; peakWindowData.push({ x: minPeak, y: 4.8 }); // Slightly below max complexity for clarity peakWindowData.push({ x: maxPeak, y: 4.8 }); // Add a baseline for drinkability var baselineData = []; baselineData.push({ x: 0, y: 1.5 }); // Baseline complexity baselineData.push({ x: maxChartYear, y: 1.5 }); chartInstance = new Chart(ctx, { type: 'line', data: { datasets: [ { label: 'Complexity/Development', data: dataPoints, borderColor: 'rgba(0, 74, 153, 1)', // Primary color backgroundColor: 'rgba(0, 74, 153, 0.2)', fill: false, tension: 0.4, // Makes the line slightly curved borderWidth: 2 }, { label: 'Peak Window', data: peakWindowData, borderColor: 'rgba(40, 167, 69, 1)', // Success color borderWidth: 3, borderDash: [5, 5], // Dashed line pointRadius: 0, // No points for the window line fill: false }, { label: 'Minimum Drinkability', data: baselineData, borderColor: 'rgba(108, 117, 125, 0.6)', // Gray baseline borderWidth: 1, borderDash: [3, 3], pointRadius: 0, fill: false } ] }, options: { responsive: true, maintainAspectRatio: false, scales: { x: { title: { display: true, text: 'Years from Vintage' }, grid: { color: 'rgba(200, 200, 200, 0.2)' // Lighter grid lines } }, y: { title: { display: true, text: 'Development Level (0-5)' }, min: 0, max: 5.5, // Give some headroom grid: { color: 'rgba(200, 200, 200, 0.2)' } } }, plugins: { tooltip: { callbacks: { title: function(tooltipItems) { return `Year: ${tooltipItems[0].parsed.x}`; }, label: function(tooltipItem) { var label = tooltipItem.dataset.label || ''; if (label) { label += ': '; } if (tooltipItem.dataset.label === 'Complexity/Development') { label += tooltipItem.parsed.y.toFixed(2); } else if (tooltipItem.dataset.label === 'Peak Window') { // Show the start/end year of the window if hovering near it if (tooltipItem.parsed.x === minPeak) label = `Peak Starts: Year ${minPeak}`; else if (tooltipItem.parsed.x === maxPeak) label = `Peak Ends: Year ${maxPeak}`; else label = ''; // Hide for points not exactly on min/max } else { label += tooltipItem.parsed.y.toFixed(2); } return label; } } }, legend: { position: 'top', } } } }); } function clearChart() { var ctx = document.getElementById('agingChart').getContext('2d'); if (chartInstance) { chartInstance.destroy(); chartInstance = null; } // Clear canvas content visually ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height); // Optionally draw a placeholder message ctx.font = "16px Arial"; ctx.fillStyle = "#999"; ctx.textAlign = "center"; ctx.fillText("Enter data to see chart", ctx.canvas.width/2, ctx.canvas.height/2); } function clearTable() { var tableBody = document.getElementById('agingTable').getElementsByTagName('tbody')[0]; tableBody.innerHTML = ''; var row = tableBody.insertRow(); row.insertCell(0).textContent = "–"; row.insertCell(1).textContent = "–"; row.insertCell(2).textContent = "–"; } function resetCalculator() { document.getElementById('wineType').value = 'red'; document.getElementById('acidityScore').value = '7'; document.getElementById('tanninLevel').value = '4'; // Medium document.getElementById('alcoholContent').value = '13.5'; document.getElementById('sugarLevel').value = '0'; document.getElementById('phLevel').value = '3.5'; document.getElementById('storageTemp').value = '13'; // Clear errors document.getElementById('acidityScoreError').textContent = ""; document.getElementById('acidityScoreError').classList.remove('visible'); document.getElementById('tanninLevelError').textContent = ""; document.getElementById('tanninLevelError').classList.remove('visible'); document.getElementById('alcoholContentError').textContent = ""; document.getElementById('alcoholContentError').classList.remove('visible'); document.getElementById('sugarLevelError').textContent = ""; document.getElementById('sugarLevelError').classList.remove('visible'); document.getElementById('phLevelError').textContent = ""; document.getElementById('phLevelError').classList.remove('visible'); document.getElementById('storageTempError').textContent = ""; document.getElementById('storageTempError').classList.remove('visible'); // Reset results document.getElementById('mainResult').textContent = '–'; document.getElementById('intermediateBaseAge').textContent = '–'; document.getElementById('intermediateTempFactor').textContent = '–'; document.getElementById('intermediatePeakYears').textContent = '–'; document.getElementById('intermediateTanninImpact').textContent = '–'; clearTable(); clearChart(); // Add placeholder text to chart and table if cleared var ctx = document.getElementById('agingChart').getContext('2d'); ctx.font = "16px Arial"; ctx.fillStyle = "#999"; ctx.textAlign = "center"; ctx.fillText("Enter data to see chart", ctx.canvas.width/2, ctx.canvas.height/2); var tableBody = document.getElementById('agingTable').getElementsByTagName('tbody')[0]; var row = tableBody.insertRow(); row.insertCell(0).textContent = "–"; row.insertCell(1).textContent = "–"; row.insertCell(2).textContent = "–"; } function copyResults() { var mainResult = document.getElementById('mainResult').textContent; var baseAge = document.getElementById('intermediateBaseAge').textContent; var tempFactor = document.getElementById('intermediateTempFactor').textContent; var peakYears = document.getElementById('intermediatePeakYears').textContent; var tanninImpact = document.getElementById('intermediateTanninImpact').textContent; var tableRows = document.getElementById('agingTable').rows; var tableContent = "Year | Stage | Notes\n"; for (var i = 1; i calculatorContainer.offsetTop && (scrollPosition + resultsHeight) < (calculatorContainer.offsetTop + calculatorHeight)) { resultsContainer.classList.add('sticky'); } else { resultsContainer.classList.remove('sticky'); } }); }

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