Blending Ratio Calculator
ANA›Life Services Authority›National Calculator Authority›Blending Ratio Calculator
.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }
Blending Ratio Calculator
Calculate the required ratio of two components to achieve a target property (e.g., concentration, viscosity index, octane number, proof) using the lever rule / mixing rule.
Component A — Property Value
Property value of pure Component A (e.g., octane number, % concentration, viscosity)
Component B — Property Value
Property value of pure Component B
Target Blend Property Value
Desired property value of the final blend (must be between A and B)
Total Blend Volume / Mass (optional)
If provided, calculates absolute quantities of each component
Unit Label (optional)
Unit for the total volume/mass display
Calculate Blending Ratio
function bleCalc() { const resultDiv = document.getElementById('ble-result'); resultDiv.style.display = 'block';
const propA = parseFloat(document.getElementById('ble-prop-a').value); const propB = parseFloat(document.getElementById('ble-prop-b').value); const propT = parseFloat(document.getElementById('ble-prop-target').value); const totalVol = parseFloat(document.getElementById('ble-total-volume').value); const unitRaw = document.getElementById('ble-unit').value.trim(); const unit = unitRaw || 'units';
// --- Validation --- if (isNaN(propA) || isNaN(propB) || isNaN(propT)) { resultDiv.innerHTML = 'Please enter values for Component A, Component B, and the Target property.'; return; } if (propA === propB) { resultDiv.innerHTML = 'Component A and Component B cannot have the same property value — no unique blend ratio exists.'; return; } const lo = Math.min(propA, propB); const hi = Math.max(propA, propB); if (propT hi) { resultDiv.innerHTML = 'Target value (' + propT + ') must be between Component A (' + propA + ') and Component B (' + propB + ').'; return; } if (!isNaN(totalVol) && totalVol Total volume/mass must be a positive number.'; return; }
// --- Lever Rule --- // x_A = fraction of Component A // x_A * propA + (1 - x_A) * propB = propT // x_A * (propA - propB) = propT - propB // x_A = (propT - propB) / (propA - propB) const fracA = (propT - propB) / (propA - propB); const fracB = 1 - fracA;
const pctA = (fracA * 100).toFixed(4); const pctB = (fracB * 100).toFixed(4);
// Simplest integer ratio (GCD approach on scaled integers) function gcd(a, b) { return b '; html += '' + 'Parameter' + 'Component A' + 'Component B' + '';
const rows = [ ['Property Value', propA, propB ], ['Fraction (decimal)', fracA.toFixed(6), fracB.toFixed(6)], ['Percentage (%)', pctA + ' %', pctB + ' %' ], ['Simplified Ratio', ratioA, ratioB ], ]; rows.forEach(function(r, i) { const bg = i % 2 === 0 ? '#f8fafc' : '#fff'; html += '' + '' + r[0] + '' + '' + r[1] + '' + '' + r[2] + '' + ''; }); html += '';
html += 'Simplified Ratio A : B = ' + ratioA + ' : ' + ratioB + '
'; html += 'Verified blend property: ' + (fracA * propA + fracB * propB).toFixed(6) + ' (target: ' + propT + ')
';
// Absolute quantities if (!isNaN(totalVol) && totalVol > 0) { const qA = (fracA * totalVol).toFixed(4); const qB = (fracB * totalVol).toFixed(4); html += ''; html += '#### Absolute Quantities (Total = ' + totalVol + ' ' + unit + ') '; html += '' + '- Component A: ' + qA + ' ' + unit + '' + '- Component B: ' + qB + ' ' + unit + '' + ''; }
resultDiv.innerHTML = html; }
#### Formula — Lever Rule (Linear Mixing Rule)
For a two-component blend where the property mixes linearly:
Pblend = xA · PA + xB · PB
where xA + xB = 1
Solving for the fraction of Component A:
xA = (Ptarget − PB) / (PA − PB)
xB = 1 − xA
Absolute quantity of each component given total volume/mass V:
QA = xA · V QB = xB · V
#### Assumptions & References
- The property of interest mixes linearly by volume or mass fraction (ideal mixing / lever rule). This is valid for many concentration, proof, and index blending problems.
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