Siding Coverage Calculator
ANA›Life Services Authority›National Calculator Authority›Siding Coverage 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; } }
Siding Coverage Calculator
Calculate the total siding material needed for your project based on wall dimensions, openings, and waste factor.
Wall Sections (enter each wall as Width x Height, one per line)
Enter each wall section as: width x height (in feet)
Openings to Subtract (doors/windows, one per line)
Enter each opening as: width x height (in feet). Leave blank if none.
Gable/Triangle Sections (base x height, one per line)
Enter each gable as: base x height (in feet). Leave blank if none.
Waste Factor (%)
Typical: 10% for standard installs, 15% for diagonal/complex patterns.
Coverage per Square (sq ft)
1 square = 100 sq ft. Most siding is sold by the square.
Calculate
function sidParseLines(text) { var lines = text.trim().split(/ /); var results = []; for (var i = 0; i 50) { resultDiv.innerHTML = 'Waste factor must be between 0% and 50%.
'; return; } if (isNaN(coverageSqFt) || coverageSqFt Wall ' + (i+1) + '' + walls[i][0].toFixed(1) + ' ft' + walls[i][1].toFixed(1) + ' ft' + (walls[i][0]walls[i][1]).toFixed(2) + ' sq ft'; } var openRows = ''; for (var i = 0; i Opening ' + (i+1) + '' + openings[i][0].toFixed(1) + ' ft' + openings[i][1].toFixed(1) + ' ft-' + (openings[i][0]openings[i][1]).toFixed(2) + ' sq ft'; } var gableRows = ''; for (var i = 0; i Gable ' + (i+1) + '' + gables[i][0].toFixed(1) + ' ft (base)' + gables[i][1].toFixed(1) + ' ft (ht)+' + (0.5gables[i][0]gables[i][1]).toFixed(2) + ' sq ft'; }
resultDiv.innerHTML = '### Results ' + '' + '' + 'Section' + 'Width' + 'Height' + 'Area' + '' + '' + wallRows + gableRows + openRows + '' + '' + '' + 'Total Wall Area' + totalWallArea.toFixed(2) + ' sq ft' + '+ Gable Area+' + totalGableArea.toFixed(2) + ' sq ft' + '− Openings Area−' + totalOpenArea.toFixed(2) + ' sq ft' + 'Net Area' + netArea.toFixed(2) + ' sq ft' + 'Waste Factor' + wastePct.toFixed(1) + '% (+' + (netArea(wastePct/100)).toFixed(2) + ' sq ft)' + 'Total Area Needed' + areaWithWaste.toFixed(2) + ' sq ft*' + 'Squares Needed (exact)*' + squaresNeeded.toFixed(3) + ' squares*' + '📦 Order This Many Squares**' + squaresOrder.toFixed(1) + ' squares (' + (squaresOrder * coverageSqFt).toFixed(0) + ' sq ft)' + ''; }
#### Formulas Used
Total Wall Area = Σ (Wall Width × Wall Height)
Gable Area = Σ (0.5 × Base × Height) — triangular gable ends
Net Area = Total Wall Area + Gable Area − Σ Opening Areas
Area with Waste = Net Area × (1 + Waste% ÷ 100)
Squares Needed = Area with Waste ÷ Coverage per Square
Order Quantity = ⌈Squares Needed × 2⌉ ÷ 2 — rounded up to nearest 0.5 square
#### Assumptions & References
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