Carpet Area Measurement Calculator
ANA›Life Services Authority›National Calculator Authority›Carpet Area Measurement 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; } }
Carpet Area Measurement Calculator
Calculate the total carpet area needed for your room, accounting for waste from cuts and pattern matching.
Room Length (ft)
Room Width (ft)
Waste Factor (%)
Carpet Roll Width (ft)
Price per Square Yard (optional, $)
Calculate
function carCalc() { var resultDiv = document.getElementById('car-result');
var roomLength = parseFloat(document.getElementById('car-room-length').value); var roomWidth = parseFloat(document.getElementById('car-room-width').value); var wasteFactor = parseFloat(document.getElementById('car-waste-factor').value); var carpetWidth = parseFloat(document.getElementById('car-carpet-width').value); var pricePerSqYd = parseFloat(document.getElementById('car-price-per-sqyd').value);
// Validation if (isNaN(roomLength) || roomLength Please enter a valid Room Length greater than 0.'; return; } if (isNaN(roomWidth) || roomWidth Please enter a valid Room Width greater than 0.'; return; } if (isNaN(wasteFactor) || wasteFactor 50) { resultDiv.innerHTML = 'Waste Factor must be between 0% and 50%.'; return; } if (isNaN(carpetWidth) || carpetWidth Please enter a valid Carpet Roll Width greater than 0.'; return; }
// --- Core Calculations ---
// Net room area in square feet var netAreaSqFt = roomLength * roomWidth;
// Gross area with waste factor applied // grossArea = netArea × (1 + wasteFactor / 100) var grossAreaSqFt = netAreaSqFt * (1 + wasteFactor / 100);
// Convert to square yards (1 sq yd = 9 sq ft) var netAreaSqYd = netAreaSqFt / 9; var grossAreaSqYd = grossAreaSqFt / 9;
// Number of carpet strips needed from the roll // Each strip runs the full room length; strips needed = ceil(roomWidth / carpetWidth) var stripsNeeded = Math.ceil(roomWidth / carpetWidth);
// Linear feet of carpet needed from the roll // linearFeet = stripsNeeded × roomLength × (1 + wasteFactor / 100) var linearFeet = stripsNeeded * roomLength * (1 + wasteFactor / 100);
// Actual carpet area purchased (roll width × linear feet) var purchasedAreaSqFt = carpetWidth * linearFeet; var purchasedAreaSqYd = purchasedAreaSqFt / 9;
// Cost estimate (if price provided) var costHtml = ''; if (!isNaN(pricePerSqYd) && pricePerSqYd > 0) { var totalCost = purchasedAreaSqYd * pricePerSqYd; costHtml = 'Estimated Cost$' + totalCost.toFixed(2) + ''; }
resultDiv.innerHTML = '### Results ' + '' + 'MetricValue' + 'Net Room Area' + netAreaSqFt.toFixed(2) + ' sq ft (' + netAreaSqYd.toFixed(2) + ' sq yd)' + 'Gross Area (with ' + wasteFactor + '% waste)' + grossAreaSqFt.toFixed(2) + ' sq ft (' + grossAreaSqYd.toFixed(2) + ' sq yd)' + 'Carpet Strips Needed' + stripsNeeded + ' strip(s) × ' + carpetWidth + ' ft wide' + 'Linear Feet of Carpet Roll' + linearFeet.toFixed(2) + ' ft' + 'Total Carpet to Purchase' + purchasedAreaSqFt.toFixed(2) + ' sq ft (' + purchasedAreaSqYd.toFixed(2) + ' sq yd)' + costHtml + ''; }
#### Formulas Used
Net Room Area (sq ft) = Room Length × Room Width
Gross Area (sq ft) = Net Area × (1 + Waste Factor / 100)
Carpet Strips Needed = ⌈ Room Width ÷ Carpet Roll Width ⌉
Linear Feet of Roll = Strips Needed × Room Length × (1 + Waste Factor / 100)
Total Carpet to Purchase (sq ft) = Carpet Roll Width × Linear Feet
Area in Square Yards = Area in sq ft ÷ 9
Estimated Cost ($) = Total Purchased Area (sq yd) × Price per sq yd
#### Assumptions & References
- A standard waste factor of 10% is pre-filled; increase to 15–20% for rooms with many cuts, diagonal layouts, or large pattern repeats.
- The number of strips is rounded up (ceiling function) to ensure full coverage across the room width.
- Reference: Carpet and Rug Institute (CRI) — Installation Standard CRI 104 recommends a minimum 10% overage for residential installations.
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