Stucco Material Coverage Calculator

ANA›Life Services Authority›National Calculator Authority›Stucco Material 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; } }

Stucco Material Coverage Calculator

Calculate the amount of cement, sand, lime, and water needed to stucco a wall or surface area. Supports single-coat and three-coat systems.

Wall Length (ft)

Wall Height (ft)

Total Openings Area (ft²) doors, windows — enter 0 if none

Coat System

Three-Coat System (scratch + brown + finish) One-Coat System (base + finish combined)

Mix Ratio (Cement : Lime : Sand)

1 : 0.5 : 4.5 — Standard Scratch/Brown Coat 1 : 1 : 6 — Softer / Finish Coat 1 : 0 : 3 — High-Strength (no lime) 1 : 2 : 9 — Lime-Rich Finish

Waste Factor (%)

Calculate

function stuCalc() { var resultDiv = document.getElementById('stu-result'); resultDiv.style.display = 'none'; resultDiv.innerHTML = '';

// --- Inputs --- var length = parseFloat(document.getElementById('stu-length').value); var height = parseFloat(document.getElementById('stu-height').value); var openings = parseFloat(document.getElementById('stu-openings').value); var coatSys = document.getElementById('stu-coat').value; var mixVal = document.getElementById('stu-mix').value; var waste = parseFloat(document.getElementById('stu-waste').value);

// --- Validation --- var errors = []; if (isNaN(length) || length 50) errors.push('Waste Factor must be between 0 and 50%.');

var grossArea = length * height; if (!isNaN(openings) && openings >= grossArea) { errors.push('Openings area must be less than total wall area (' + grossArea.toFixed(2) + ' ft²).'); }

if (errors.length > 0) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '' + errors.map(function(e){ return ''; }).join('') + ''; return; }

// --- Net Area --- var netArea = grossArea - openings; // ft²

// --- Coat Thicknesses (inches) --- // Three-coat: scratch 3/8", brown 3/8", finish 1/8" → total 7/8" // One-coat: base+finish combined 3/8" var coatData; if (coatSys === 'three') { coatData = [ { name: 'Scratch Coat', thickness: 3/8 }, { name: 'Brown Coat', thickness: 3/8 }, { name: 'Finish Coat', thickness: 1/8 } ]; } else { coatData = [ { name: 'One-Coat Base/Finish', thickness: 3/8 } ]; }

// --- Mix Ratio --- var parts = mixVal.split(':').map(Number); var cPart = parts[0]; // cement var lPart = parts[1]; // lime var sPart = parts[2]; // sand var totalParts = cPart + lPart + sPart;

// --- Water-Cement Ratio --- // Typical w/c ratio by weight ≈ 0.45–0.55; use 0.50 var wcRatio = 0.50;

// --- Density assumptions --- // Portland cement bulk density: 94 lb/ft³ (1 bag = 1 ft³ loose ≈ 94 lb) // Hydrated lime bulk density: 40 lb/ft³ // Sand bulk density: 100 lb/ft³ // Water density: 62.4 lb/ft³ → 8.34 lb/gal var cementDensity = 94; // lb/ft³ var limeDensity = 40; // lb/ft³ var sandDensity = 100; // lb/ft³ var waterLbPerGal = 8.34;

// --- Yield factor --- // Mixed stucco yield ≈ 27% less volume than dry ingredients (air voids fill) // Approximate yield factor: volume of wet mortar ≈ 0.67 × volume of dry sand // Simpler industry rule: 1 bag cement (1 ft³) + proportional lime & sand // yields approximately (totalParts / sPart) × 0.67 ft³ of mortar per ft³ sand // We use: required dry sand volume = net mortar volume / 0.67 var yieldFactor = 0.67; // mortar volume / dry-ingredient volume

var wasteFactor = 1 + waste / 100;

// Accumulate totals across coats var totalCementBags = 0; var totalLimeLb = 0; var totalSandCuFt = 0; var totalWaterGal = 0; var coatRows = '';

for (var i = 0; i ' + '' + coat.name + '' + '' + coat.thickness.toFixed(3) + '"' + '' + mortarVol.toFixed(2) + ' ft³' + '' + cementBags.toFixed(2) + ' bags' + '' + limeLb.toFixed(1) + ' lb' + '' + sandVol.toFixed(2) + ' ft³' + '' + waterGal.toFixed(1) + ' gal' + ''; }

// Sand in tons (1 ton = 2000 lb; sand density 100 lb/ft³) var sandTons = (totalSandCuFt * sandDensity) / 2000;

// --- Output --- var html = '### Results ';

html += '' + '' + 'CoatThicknessMortar Vol (w/ waste)' + 'CementLime (lb)Sand (ft³)Water (gal)' + '' + '' + coatRows + '' + '';

html += '### Project Totals '; html += '' + 'Net Wall Area' + netArea.toFixed(2) + ' ft²' + 'Gross Wall Area' + grossArea.toFixed(2) + ' ft²' + 'Openings Deducted' + openings.toFixed(2) + ' ft²' + 'Coat System' + (coatSys === 'three' ? 'Three-Coat (7/8" total)' : 'One-Coat (3/8" total)') + '' + 'Mix Ratio (C:L:S)' + mixVal + '' + 'Waste Factor' + waste + '%' + 'Total Cement' + totalCementBags.toFixed(1) + ' bags (94 lb each) = ' + (totalCementBags * 94).toFixed(0) + ' lb' + 'Total Hydrated Lime' + totalLimeLb.toFixed(1) + ' lb' + 'Total Sand' + totalSandCuFt.toFixed(2) + ' ft³ ≈ ' + sandTons.toFixed(2) + ' tons' + 'Total Water' + totalWaterGal.toFixed(1) + ' gallons' + '';

resultDiv.style.display = 'block'; resultDiv.innerHTML = html; }

#### Formulas Used

Net Area: Net Area (ft²) = Length × Height − Openings Area

Mortar Volume per Coat: Vmortar = Net Area × (Coat Thickness / 12) × Waste Factor

Dry Ingredient Volume: Vdry = Vmortar / Yield Factor (0.67)

Individual Material Volumes:

Cement Bags: Bags = (Vcement × 94 lb/ft³) / 94 lb/bag

Water: Water (lb) = w/c ratio (0.50) × Cement Weight (lb); Gallons = lb / 8.34

Sand (tons): Tons = (Vsand × 100 lb/ft³) / 2000

#### Assumptions & References

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References

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