Stucco Crack Repair Area Calculator
ANA›Life Services Authority›National Calculator Authority›Stucco Crack Repair Area 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; } }
Stucco Crack Repair Area Calculator
Calculate the total repair area and estimated material quantities needed to fix stucco cracks, accounting for the required repair zone around each crack.
Total Crack Length (ft)
Average Crack Width (inches)
Repair Zone Width Each Side of Crack (inches)
Average Crack Depth (inches)
Number of Separate Cracks
Waste / Overlap Factor (%)
Calculate
function stuCalc() { // --- gather inputs --- var crackLengthFt = parseFloat(document.getElementById('stu-crack-length').value); var crackWidthIn = parseFloat(document.getElementById('stu-crack-width').value); var repairZoneIn = parseFloat(document.getElementById('stu-repair-zone').value); var crackDepthIn = parseFloat(document.getElementById('stu-crack-depth').value); var numCracks = parseInt(document.getElementById('stu-num-cracks').value); var wastePct = parseFloat(document.getElementById('stu-waste-factor').value);
var resultDiv = document.getElementById('stu-result');
// --- validation --- var errors = []; if (isNaN(crackLengthFt) || crackLengthFt 50) errors.push("Waste factor must be between 0% and 50%.");
if (errors.length > 0) { resultDiv.style.display = 'block'; resultDiv.innerHTML = 'Please fix the following errors:' + errors.map(function(e){ return ''; }).join('') + ''; return; }
// --- unit conversions --- // Convert crack length from feet to inches for consistent units var crackLengthIn = crackLengthFt * 12;
// --- core formulas --- // Total repair strip width (inches) = crack width + 2 × repair zone on each side // Formula: W_repair = W_crack + 2 × Z_repair var repairStripWidthIn = crackWidthIn + 2 * repairZoneIn;
// Gross repair area per crack (sq in) = crack length × repair strip width // Formula: A_crack = L_crack × W_repair var repairAreaPerCrackSqIn = crackLengthIn * repairStripWidthIn;
// Total gross repair area (sq in) for all cracks var totalRepairAreaSqIn = repairAreaPerCrackSqIn * numCracks;
// Convert to sq ft: 1 sq ft = 144 sq in var totalRepairAreaSqFt = totalRepairAreaSqIn / 144;
// Apply waste/overlap factor // Formula: A_total = A_gross × (1 + waste% / 100) var wasteFactor = 1 + wastePct / 100; var totalRepairAreaWithWasteSqFt = totalRepairAreaSqFt * wasteFactor;
// Volume of crack fill material (cubic inches) per crack // Formula: V_fill = L_crack × W_crack × D_crack var fillVolumePerCrackCuIn = crackLengthIn * crackWidthIn * crackDepthIn; var totalFillVolumeCuIn = fillVolumePerCrackCuIn * numCracks;
// Convert fill volume to fluid ounces (1 fl oz = 1.80469 cu in) and quarts (1 qt = 57.75 cu in) var totalFillVolumeFlOz = totalFillVolumeCuIn / 1.80469; var totalFillVolumeQt = totalFillVolumeCuIn / 57.75;
// Apply waste factor to fill volume var totalFillVolumeWithWasteFlOz = totalFillVolumeFlOz * wasteFactor; var totalFillVolumeWithWasteQt = totalFillVolumeQt * wasteFactor;
// Stucco patch compound coverage: typical pre-mixed stucco patch covers ~50 sq ft per gallon at 1/8" depth // Adjusted coverage for actual depth: coverage_adj = 50 × (0.125 / depth_ft) var depthFt = crackDepthIn / 12; var coveragePerGalSqFt = 50 * (0.125 / depthFt); // sq ft per gallon var gallonsNeeded = totalRepairAreaWithWasteSqFt / coveragePerGalSqFt;
// Average crack length per crack var avgCrackLengthFt = crackLengthFt / numCracks;
// --- display results --- resultDiv.style.display = 'block'; resultDiv.innerHTML = '### Results ' + '' + 'Repair Strip Width' + '' + repairStripWidthIn.toFixed(2) + ' in (' + (repairStripWidthIn/12).toFixed(3) + ' ft)' + 'Avg Crack Length per Crack' + '' + avgCrackLengthFt.toFixed(2) + ' ft' + 'Gross Repair Area (all cracks)' + '' + totalRepairAreaSqFt.toFixed(2) + ' sq ft' + 'Total Repair Area (with ' + wastePct + '% waste)' + '' + totalRepairAreaWithWasteSqFt.toFixed(2) + ' sq ft' + 'Crack Fill Volume (gross)' + '' + totalFillVolumeCuIn.toFixed(2) + ' cu in / ' + totalFillVolumeFlOz.toFixed(1) + ' fl oz / ' + totalFillVolumeQt.toFixed(2) + ' qt' + 'Crack Fill Volume (with waste)' + '' + (totalFillVolumeCuIn * wasteFactor).toFixed(2) + ' cu in / ' + totalFillVolumeWithWasteFlOz.toFixed(1) + ' fl oz / ' + totalFillVolumeWithWasteQt.toFixed(2) + ' qt' + 'Estimated Stucco Patch Compound' + '' + gallonsNeeded.toFixed(2) + ' gallon(s)' + '' + '* Coverage estimate based on pre-mixed stucco patch at 50 sq ft/gal at 1/8" depth, adjusted for your crack depth of ' + crackDepthIn.toFixed(2) + '".
'; }
#### Formulas Used
Repair Strip Width: Wrepair = Wcrack + 2 × Zrepair
Gross Repair Area (per crack): Acrack = Lcrack × Wrepair
Total Gross Repair Area: Agross = Acrack × Ncracks
Total Repair Area with Waste: Atotal = Agross × (1 + waste% ÷ 100)
Crack Fill Volume (per crack): Vfill = Lcrack × Wcrack × Dcrack
Adjusted Patch Compound Coverage: Coverageadj = 50 sq ft/gal × (0.125 in ÷ Dcrack in) Gallons = Atotal ÷ Coverageadj
#### Assumptions & References
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