Grout Coverage Calculator

ANA›Life Services Authority›National Calculator Authority›Grout 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; } }

Grout Coverage Calculator

Calculate the amount of grout needed for your tiling project based on tile dimensions, joint width, tile thickness, and total area.

Total Tile Area (sq ft)

Tile Width (inches)

Tile Height (inches)

Grout Joint Width (inches)

Tile Thickness (inches)

Grout Density (lbs/ft³)

Waste Factor (%)

Calculate Fill in the fields above and click Calculate.

function groCalc() { var area = parseFloat(document.getElementById('gro_area').value); var tileW = parseFloat(document.getElementById('gro_tile_w').value); var tileH = parseFloat(document.getElementById('gro_tile_h').value); var jointW = parseFloat(document.getElementById('gro_joint_w').value); var tileDepth = parseFloat(document.getElementById('gro_tile_depth').value); var density = parseFloat(document.getElementById('gro_grout_density').value); var waste = parseFloat(document.getElementById('gro_waste').value); var resultDiv = document.getElementById('gro_result');

// --- Validation --- if (isNaN(area) || area Please enter a valid positive Total Tile Area.'; return; } if (isNaN(tileW) || tileW Please enter a valid positive Tile Width.'; return; } if (isNaN(tileH) || tileH Please enter a valid positive Tile Height.'; return; } if (isNaN(jointW) || jointW Please enter a valid positive Grout Joint Width.'; return; } if (isNaN(tileDepth) || tileDepth Please enter a valid positive Tile Thickness.'; return; } if (isNaN(density) || density Please enter a valid positive Grout Density.'; return; } if (isNaN(waste) || waste 50) { resultDiv.innerHTML = 'Waste Factor must be between 0 and 50%.'; return; } if (jointW >= tileW || jointW >= tileH) { resultDiv.innerHTML = 'Grout Joint Width must be smaller than both tile dimensions.'; return; }

/ * Formula (industry standard — TCNA / Ceramic Tile Institute): * * grout_volume_ft3 = area_ft2 * × [ (tileW_in + tileH_in) / (tileW_in × tileH_in) ] * × jointW_in * × tileDepth_in * × (1/144) ← converts in² → ft² (joint cross-section) * * Simplified: * Joint factor (JF) = (W + H) / (W × H) [per inch of tile area, in⁻¹] * Grout volume (ft³) = area_ft2 × JF × jointW_in × tileDepth_in / 144 * * Weight (lbs) = volume_ft3 × density_lbs_per_ft3 * With waste = weight × (1 + waste%/100) /

var JF = (tileW + tileH) / (tileW * tileH); // in⁻¹ var volumeFt3 = area * JF * jointW * tileDepth / 144; // ft³ var weightLbs = volumeFt3 * density; // lbs (net) var weightTotal = weightLbs * (1 + waste / 100); // lbs (with waste)

// Common bag sizes var bags10 = Math.ceil(weightTotal / 10); var bags25 = Math.ceil(weightTotal / 25); var bags50 = Math.ceil(weightTotal / 50);

// Tiles per sq ft (for reference) var tilesPerSqFt = 144 / (tileW * tileH);

resultDiv.innerHTML = '### Results ' + '' + 'Joint Factor' + '' + JF.toFixed(4) + ' in⁻¹' + 'Net Grout Volume' + '' + volumeFt3.toFixed(4) + ' ft³' + 'Net Grout Weight' + '' + weightLbs.toFixed(2) + ' lbs' + 'Grout Needed (with ' + waste + '% waste)' + '' + weightTotal.toFixed(2) + ' lbs' + 'Bags Needed (10 lb bags)' + '' + bags10 + ' bags' + 'Bags Needed (25 lb bags)' + '' + bags25 + ' bags' + 'Bags Needed (50 lb bags)' + '' + bags50 + ' bags' + 'Tiles per sq ft' + '' + tilesPerSqFt.toFixed(2) + '' + ''; }

#### Formula

Joint Factor (JF) = (Tile Width + Tile Height) / (Tile Width × Tile Height)  [in⁻¹]

Grout Volume (ft³) = Area (ft²) × JF × Joint Width (in) × Tile Thickness (in) / 144

Grout Weight (lbs) = Grout Volume (ft³) × Grout Density (lbs/ft³)

Total Grout with Waste (lbs) = Grout Weight × (1 + Waste% / 100)

The Joint Factor accounts for the linear feet of joints per square foot of tile area. Dividing by 144 converts the joint cross-sectional area from in² to ft².

#### Assumptions & References

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References

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