🍳Fermentation Calculator

Calculate ABV, gravity conversions, calories, and fermentation metrics for beer, wine, mead, and cider brewing with precision accuracy and AI assistance

🤔 What Is Fermentation Calculator?

Think of a brewing scientist in your pocket - that's the Fermentation Calculator! Calculate ABV, gravity readings, calories, and fermentation metrics for beer, wine, mead, and cider with precision. Get AI brewing assistance from ChatGPT and Claude for perfect batches every time!

🍺 Alcohol by Volume (ABV) Calculator

Beverage Type

Original Gravity (OG)

Final Gravity (FG)

🍺 Enter your gravity readings to calculate ABV and fermentation metrics

⚖️ Gravity & Unit Converter

Specific Gravity

Temperature (°F)

⚖️ Enter specific gravity to convert between Brix, Plato, and other units

🔥 Calorie & Carb Calculator

Original Gravity (OG)

Final Gravity (FG)

Serving Size (oz)

🔥 Enter gravity readings to calculate calories and carbohydrates

🧪 Yeast Pitch Rate Calculator

Batch Size (gallons)

Original Gravity

Fermentation Type

Desired Character

🧪 Enter batch details to calculate optimal yeast pitch rate

📊 Attenuation Calculator

Original Gravity (OG)

Final Gravity (FG)

📊 Enter gravity readings to calculate apparent and real attenuation

🎯 Try Sample Calculations

🍺 IPA Beer

OG: 1.065, FG: 1.012 → 7.0% ABV

🍷 Red Wine

OG: 1.095, FG: 0.995 → 13.3% ABV

🍻 Lager

OG: 1.048, FG: 1.008 → 5.3% ABV

🍯 Mead

OG: 1.120, FG: 1.020 → 13.4% ABV

🍎 Cider

OG: 1.055, FG: 1.000 → 7.2% ABV

🖤 Stout

OG: 1.072, FG: 1.018 → 7.1% ABV

`; } function displayGravityResults(data) { const container = document.getElementById('gravityResult'); container.innerHTML = `

SG: ${data.correctedSG.toFixed(4)}

✅ Temperature corrected from ${data.temperature}°F

Specific Gravity (Corrected)

${data.correctedSG.toFixed(4)}

Brix

${data.brix.toFixed(1)}°Bx

Plato

${data.plato.toFixed(1)}°P

Oechsle

${data.oechsle.toFixed(0)}°Oe

Baumé

${data.baume.toFixed(1)}°Bé

Potential Alcohol

${data.potentialAlcohol.toFixed(1)}%

`; } function displayCalorieResults(data) { const container = document.getElementById('calorieResult'); container.innerHTML = `

${data.totalCalories.toFixed(0)} calories

✅ Per ${data.servingSize} oz serving (${data.abv.toFixed(1)}% ABV)

Total Calories

${data.totalCalories.toFixed(0)}kcal

From Alcohol

${data.alcoholCalories.toFixed(0)}kcal

From Carbs

${data.carbCalories.toFixed(0)}kcal

Carbohydrates

${data.carbGrams.toFixed(1)}g

Alcohol Content

${data.abv.toFixed(1)}% ABV

Serving Size

${data.servingSize}oz

`; } function displayPitchResults(data) { const container = document.getElementById('pitchResult'); // Calculate number of yeast packets needed (assuming 100 billion cells per packet) const packetsNeeded = data.totalCells / 100000000000; container.innerHTML = `

${data.pitchRate.toFixed(1)} M cells/mL/°P

✅ Optimal pitch rate calculated for ${data.plato.toFixed(1)}°P wort

Pitch Rate

${data.pitchRate.toFixed(1)}M/mL/°P

Cells per mL

${data.cellsPerMl.toFixed(1)}M

Total Cells Needed

${(data.totalCells / 1000000000).toFixed(0)}B

Yeast Packets

${packetsNeeded.toFixed(1)}packs

Wort Gravity

${data.plato.toFixed(1)}°P

Recommendation

${Math.ceil(packetsNeeded)}packs

`; } function displayAttenuationResults(data) { const container = document.getElementById('attenuationResult'); container.innerHTML = `

${data.apparentAttenuation.toFixed(1)}% AA

✅ Fermentation efficiency analysis completed

Apparent Attenuation

${data.apparentAttenuation.toFixed(1)}%

Real Attenuation

${data.realAttenuation.toFixed(1)}%

Alcohol Content

${data.abv.toFixed(1)}% ABV

Real Extract

${data.realExtract.toFixed(1)}°P

Original Gravity

${data.og.toFixed(3)}

Final Gravity

${data.fg.toFixed(3)}

`; } // ========== COPY FUNCTIONS ========== function copyABVResults(abv, type) { const text = `${type.charAt(0).toUpperCase() + type.slice(1)} Analysis:\nABV: ${abv}%\nCalculated with WIA Pin Code Fermentation Calculator`; copyToClipboard(text); } function copyGravityResults(sg, brix, plato) { const text = `Gravity Conversion:\nSG: ${sg}\nBrix: ${brix}°Bx\nPlato: ${plato}°P\nCalculated with WIA Pin Code Fermentation Calculator`; copyToClipboard(text); } function copyCalorieResults(calories, carbs, serving) { const text = `Nutrition Facts (${serving} oz):\nCalories: ${calories} kcal\nCarbohydrates: ${carbs}g\nCalculated with WIA Pin Code Fermentation Calculator`; copyToClipboard(text); } function copyPitchResults(rate, packets) { const text = `Yeast Pitch Rate:\n${rate} M cells/mL/°P\nRecommended: ${packets} yeast packets\nCalculated with WIA Pin Code Fermentation Calculator`; copyToClipboard(text); } function copyAttenuationResults(apparent, real) { const text = `Attenuation Analysis:\nApparent: ${apparent}%\nReal: ${real}%\nCalculated with WIA Pin Code Fermentation Calculator`; copyToClipboard(text); } // ========== SAMPLE USAGE FUNCTIONS ========== function useSample(sampleId) { const samples = { 'ipa': { og: 1.065, fg: 1.012, type: 'beer' }, 'wine': { og: 1.095, fg: 0.995, type: 'wine' }, 'lager': { og: 1.048, fg: 1.008, type: 'beer' }, 'mead': { og: 1.120, fg: 1.020, type: 'mead' }, 'cider': { og: 1.055, fg: 1.000, type: 'cider' }, 'stout': { og: 1.072, fg: 1.018, type: 'beer' } }; const sample = samples[sampleId]; if (!sample) return; // Switch to ABV tab if not active if (currentTab !== 'abv') { switchTab('abv'); } // Fill in the values document.getElementById('originalGravity').value = sample.og; document.getElementById('finalGravity').value = sample.fg; document.getElementById('beverageType').value = sample.type; // Auto-calculate setTimeout(() => { calculateABV(); }, 100); // Highlight button const btn = document.getElementById('abvBtn'); btn.style.animation = 'pulse 0.5s ease-in-out'; setTimeout(() => btn.style.animation = '', 500); } // ========== UTILITY FUNCTIONS ========== // Copy to clipboard function copyToClipboard(text) { navigator.clipboard.writeText(text).then(() => { showNotification('Copied to clipboard!', 'success'); }).catch(() => { // Fallback for older browsers const textArea = document.createElement('textarea'); textArea.value = text; document.body.appendChild(textArea); textArea.select(); document.execCommand('copy'); document.body.removeChild(textArea); showNotification('Copied to clipboard!', 'success'); }); } // Show error function showError(elementId, message) { const errorElement = document.getElementById(elementId); if (errorElement) { errorElement.textContent = message; errorElement.style.display = 'block'; } } // Clear errors function clearErrors(errorIds) { errorIds.forEach(id => { const element = document.getElementById(id); if (element) { element.textContent = ''; element.style.display = 'none'; } }); } // Clear all errors function clearAllErrors() { document.querySelectorAll('.error').forEach(el => { el.textContent = ''; el.style.display = 'none'; }); } // Show notification toast function showNotification(message, type = 'success') { const toast = document.createElement('div'); toast.className = `toast ${type}`; toast.textContent = message; document.body.appendChild(toast); setTimeout(() => { toast.remove(); }, 3000); } // Show OTA section (dynamic) function showOTA() { const otaContainer = document.getElementById('otaContainer'); if (otaContainer && (otaContainer.style.display === 'none' || !otaContainer.style.display)) { otaContainer.style.display = 'block'; // Attention-grabbing pulse effect setTimeout(() => { const otaHeader = document.querySelector('.ota-header h3'); if (otaHeader) { otaHeader.style.animation = 'pulse 1s ease-in-out'; } }, 100); } } // Analytics tracking function trackEvent(eventName, data = {}) { if (typeof gtag !== 'undefined') { gtag('event', eventName, { 'event_category': TOOL_CONFIG.category, 'event_label': TOOL_CONFIG.name, ...data }); } } // ========== AI ASSISTANT FUNCTIONS ========== // AI 모달 열기 function openAIModal() { const modal = document.getElementById('aiModal'); if(modal) modal.classList.add('show'); // 현재 상태에 따라 적절한 화면 표시 if (aiModalState.apiKey && aiModalState.currentView === 'gemini') { showGeminiChat(); } else { showAISelector(); } updateAPIKeyStatus(); } // AI 모달 닫기 function closeAIModal() { const modal = document.getElementById('aiModal'); if(modal) modal.classList.remove('show'); // 300ms 후 상태 리셋 (애니메이션 완료 후) setTimeout(() => { aiModalState.currentView = 'selector'; showAISelector(); }, 300); } // AI 선택 화면 표시 function showAISelector() { document.getElementById('aiModalTitle').textContent = 'Choose Your AI Assistant'; document.getElementById('aiSelector').style.display = 'flex'; document.getElementById('geminiChat').style.display = 'none'; document.getElementById('apiKeySetup').style.display = 'none'; aiModalState.currentView = 'selector'; } // Gemini 채팅 화면 표시 function showGeminiChat() { document.getElementById('aiModalTitle').innerHTML = '✨ Gemini AI Assistant'; document.getElementById('aiSelector').style.display = 'none'; document.getElementById('geminiChat').style.display = 'flex'; document.getElementById('apiKeySetup').style.display = 'none'; aiModalState.currentView = 'gemini'; // 초기 메시지가 없으면 추가 const chatMessages = document.getElementById('chatMessages'); if (!chatMessages.innerHTML.trim()) { addMessage('assistant', `Hello! I can help you with: • ABV and gravity calculations • Fermentation troubleshooting • Yeast pitch rate optimization • Calorie and nutrition analysis • Converting between brewing units What brewing question can I help you with?`); } } // API 키 설정 화면 표시 function showAPIKeySetup() { document.getElementById('aiModalTitle').textContent = 'Setup Gemini API'; document.getElementById('aiSelector').style.display = 'none'; document.getElementById('geminiChat').style.display = 'none'; document.getElementById('apiKeySetup').style.display = 'block'; aiModalState.currentView = 'setup'; } // AI 선택 처리 function selectAI(aiType) { switch(aiType) { case 'chatgpt': const toolContext = `I need help with fermentation calculations and brewing. I'm using the WIA Pin Code Fermentation Calculator tool to calculate ABV, gravity conversions, calories, yeast pitch rates, and attenuation for beer, wine, mead, and cider.`; const chatUrl = `https://chat.openai.com/?q=${encodeURIComponent(toolContext)}`; window.open(chatUrl, '_blank'); closeAIModal(); trackEvent('ai_selection', { ai_type: 'chatgpt' }); break; case 'claude': const claudeContext = `I need help with fermentation calculations and brewing. I'm using the WIA Pin Code Fermentation Calculator tool to calculate ABV, gravity conversions, calories, yeast pitch rates, and attenuation for beer, wine, mead, and cider.`; const claudeUrl = `https://claude.ai/chat?q=${encodeURIComponent(claudeContext)}`; window.open(claudeUrl, '_blank'); closeAIModal(); trackEvent('ai_selection', { ai_type: 'claude' }); break; case 'gemini': if (!aiModalState.apiKey) { showAPIKeySetup(); } else { showGeminiChat(); } trackEvent('ai_selection', { ai_type: 'gemini' }); break; } } // API 키 저장 function saveGeminiApiKey() { const apiKey = document.getElementById('geminiApiKeyInput').value.trim(); if (apiKey) { localStorage.setItem('geminiApiKey', apiKey); aiModalState.apiKey = apiKey; showGeminiChat(); updateAPIKeyStatus(); } else { alert('Please enter a valid API key'); } } // API 키 상태 업데이트 function updateAPIKeyStatus() { const statusEl = document.getElementById('apiKeyStatus'); if (aiModalState.apiKey) { statusEl.innerHTML = 'Change API Key'; } else { statusEl.textContent = 'No API key set'; } } // 채팅 메시지 추가 function addMessage(type, content) { const chatMessages = document.getElementById('chatMessages'); const messageDiv = document.createElement('div'); messageDiv.className = `message ${type}`; if (type === 'user') { messageDiv.innerHTML = `You: ${content}`; } else { messageDiv.innerHTML = `✨ Gemini:
${content.replace(/\n/g, '
')}`; } chatMessages.appendChild(messageDiv); chatMessages.scrollTop = chatMessages.scrollHeight; } // Gemini에 메시지 전송 async function sendToGemini() { const input = document.getElementById('geminiInput'); const message = input.value.trim(); if (!message) return; // 사용자 메시지 추가 addMessage('user', message); input.value = ''; // 로딩 표시 const loadingMsg = document.createElement('div'); loadingMsg.className = 'message assistant'; loadingMsg.innerHTML = '✨ Gemini:
Thinking...'; loadingMsg.id = 'loading-message'; document.getElementById('chatMessages').appendChild(loadingMsg); try { const response = await fetch(`https://generativelanguage.googleapis.com/v1beta/models/gemini-pro:generateContent?key=${aiModalState.apiKey}`, { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ contents: [{ parts: [{ text: `Context: User is using the WIA Pin Code Fermentation Calculator tool for brewing calculations including ABV, gravity conversions, calories, yeast pitch rates, and attenuation for beer, wine, mead, and cider. Current tab: ${currentTab} User question: ${message} Please provide accurate brewing and fermentation advice. Include specific gravity calculations when relevant.` }] }], generationConfig: { temperature: 0.7, maxOutputTokens: 1000 } }) }); const data = await response.json(); // 로딩 메시지 제거 document.getElementById('loading-message').remove(); if (data.candidates && data.candidates[0] && data.candidates[0].content) { const reply = data.candidates[0].content.parts[0].text; addMessage('assistant', reply); } else { addMessage('assistant', 'Sorry, I could not generate a response. Please try again.'); } } catch (error) { // 로딩 메시지 제거 document.getElementById('loading-message')?.remove(); if (error.message.includes('API key')) { addMessage('error', 'Invalid API key. Please check your API key and try again.'); showAPIKeySetup(); } else { addMessage('error', 'Failed to connect to Gemini. Please check your internet connection and try again.'); } } } // ========== EVENT LISTENERS ========== // DOM Content Loaded document.addEventListener('DOMContentLoaded', function() { // Enter key support for inputs document.querySelectorAll('.input-field').forEach(input => { input.addEventListener('keypress', function(e) { if (e.key === 'Enter') { const activeSection = document.querySelector('.calc-section.active'); const button = activeSection.querySelector('.btn'); if (button) button.click(); } }); }); // Clear errors on input document.querySelectorAll('.input-field').forEach(input => { input.addEventListener('input', clearAllErrors); }); // Handle custom serving size toggle document.getElementById('servingSize').addEventListener('change', function() { const customGroup = document.getElementById('customServingGroup'); if (this.value === 'custom') { customGroup.style.display = 'block'; } else { customGroup.style.display = 'none'; } }); // AI 버튼 이벤트 document.getElementById('aiBtn').addEventListener('click', openAIModal); // 모달 외부 클릭시 닫기 document.getElementById('aiModal').addEventListener('click', function(e) { if (e.target === this) { closeAIModal(); } }); // 엔터 키 지원 및 ESC 키로 모달 닫기 document.addEventListener('keydown', function(e) { if (e.key === 'Enter') { const geminiInput = document.getElementById('geminiInput'); if (document.activeElement === geminiInput) { sendToGemini(); } } // ESC 키로 모달 닫기 if (e.key === 'Escape') { closeAIModal(); } }); // 초기 API 키 상태 업데이트 updateAPIKeyStatus(); updateCurrentYear(); updateToolCount(); }); // Track WIA Pin Code clicks for analytics document.querySelectorAll('a[href*="wia"]').forEach(link => { link.addEventListener('click', function() { trackEvent('wia_link_click', { link: link.textContent }); }); }); // ========== DYNAMIC TOOL COUNT ========== // Update tool count dynamically async function updateToolCount() { try { const response = await fetch('/api/tool-count.php'); const data = await response.json(); // Update dynamic tools description document.querySelectorAll('.dynamic-tools-count').forEach(el => { el.textContent = `${data.count}+ free online tools in 211 languages. No signup, no fees, just tools that work.`; }); // Update "All X+ Tools" links document.querySelectorAll('.dynamic-count').forEach(el => { const prefix = el.getAttribute('data-text') || ''; const suffix = el.getAttribute('data-suffix') || ''; const icon = el.textContent.split(' ')[0] || ''; el.textContent = `${icon} ${prefix} ${data.count}+ ${suffix}`; }); } catch (error) { // Fallback: use current actual count from server const fallbackCount = 333; document.querySelectorAll('.dynamic-tools-count').forEach(el => { el.textContent = `${fallbackCount}+ free online tools in 211 languages. No signup, no fees, just tools that work.`; }); document.querySelectorAll('.dynamic-count').forEach(el => { const prefix = el.getAttribute('data-text') || ''; const suffix = el.getAttribute('data-suffix') || ''; const icon = el.textContent.split(' ')[0] || ''; el.textContent = `${icon} ${prefix} ${fallbackCount}+ ${suffix}`; }); console.log('Tool count API not available, using current count:', fallbackCount); } } // Update current year dynamically function updateCurrentYear() { const currentYear = new Date().getFullYear(); document.querySelectorAll('.current-year').forEach(el => { el.textContent = currentYear; }); } // ========== ANALYTICS ========== // Google Analytics window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-XXXXXXXXX'); // Track page view trackEvent('page_view', { tool: TOOL_CONFIG.name, category: TOOL_CONFIG.category });