Tile Square Footage Calculator
ANA›Life Services Authority›National Calculator Authority›Tile Square Footage 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; } }
Tile Square Footage Calculator
Calculate the number of tiles needed for any room or surface, including a customizable waste factor for cuts and breakage.
Room / Area Length (ft)
Room / Area Width (ft)
Tile Length (inches)
Tile Width (inches)
Waste Factor (%)
Grout Joint Width (inches)
Calculate Fill in the fields above and click Calculate.
function tilCalc() { var roomL = parseFloat(document.getElementById('til-room-length').value); var roomW = parseFloat(document.getElementById('til-room-width').value); var tileL = parseFloat(document.getElementById('til-tile-length').value); var tileW = parseFloat(document.getElementById('til-tile-width').value); var waste = parseFloat(document.getElementById('til-waste').value); var grout = parseFloat(document.getElementById('til-grout').value); var res = document.getElementById('til-result');
// --- Validation --- if (isNaN(roomL) || roomL Please enter a valid Room Length (must be > 0).'; return; } if (isNaN(roomW) || roomW Please enter a valid Room Width (must be > 0).'; return; } if (isNaN(tileL) || tileL Please enter a valid Tile Length (must be > 0).'; return; } if (isNaN(tileW) || tileW Please enter a valid Tile Width (must be > 0).'; return; } if (isNaN(waste) || waste 50) { res.innerHTML = 'Waste Factor must be between 0% and 50%.'; return; } if (isNaN(grout) || grout = Math.min(tileL, tileW)) { res.innerHTML = 'Grout joint must be >= 0 and smaller than the tile dimensions.'; return; }
// --- Core Calculations --- // 1. Total room area in sq ft var roomAreaSqFt = roomL * roomW;
// 2. Effective tile size including grout joint (convert inches → ft) var effTileLft = (tileL + grout) / 12; var effTileWft = (tileW + grout) / 12;
// 3. Area covered by one tile (sq ft) — using effective size for layout var tileAreaSqFt = (tileL / 12) * (tileW / 12); // actual tile face area var effTileAreaSqFt = effTileLft * effTileWft; // layout footprint per tile
// 4. Tiles needed without waste (based on layout footprint) var tilesNoWaste = roomAreaSqFt / effTileAreaSqFt;
// 5. Apply waste factor var wasteMult = 1 + (waste / 100); var tilesWithWaste = tilesNoWaste * wasteMult;
// 6. Round up to whole tiles var tilesNeeded = Math.ceil(tilesWithWaste);
// 7. Total tile face area purchased (sq ft) var totalTileSqFt = tilesNeeded * tileAreaSqFt;
// 8. Boxes — common box sizes for reference (20 sq ft / box) var boxSqFt = 20; var boxesNeeded = Math.ceil(totalTileSqFt / boxSqFt);
// --- Format helpers --- function fmt(n, d) { return n.toLocaleString('en-US', {minimumFractionDigits: d, maximumFractionDigits: d}); }
res.innerHTML = '### Results ' + '' + 'Room Area' + fmt(roomAreaSqFt, 2) + ' sq ft' + 'Tile Face Area (each)' + fmt(tileAreaSqFt, 4) + ' sq ft' + 'Effective Tile Layout Area (with grout)' + fmt(effTileAreaSqFt, 4) + ' sq ft' + 'Tiles Needed (no waste)' + fmt(tilesNoWaste, 2) + '' + 'Waste Factor' + fmt(waste, 0) + '%' + 'Tiles Needed (with waste, rounded up)' + fmt(tilesNeeded, 0) + ' tiles' + 'Total Tile Area to Purchase' + fmt(totalTileSqFt, 2) + ' sq ft' + 'Estimated Boxes (@ ' + boxSqFt + ' sq ft/box)' + fmt(boxesNeeded, 0) + ' boxes' + ''; }
#### Formulas Used
1. Room Area (sq ft) Room Area = Room Length (ft) × Room Width (ft)
2. Effective Tile Layout Area (sq ft) Effective Tile Area = ((Tile Length + Grout Joint) / 12) × ((Tile Width + Grout Joint) / 12) Grout joint is added to each tile dimension to account for spacing between tiles.
3. Tiles Needed Without Waste Tiles (no waste) = Room Area / Effective Tile Area
4. Tiles Needed With Waste Tiles (with waste) = Tiles (no waste) × (1 + Waste% / 100) Final count is always rounded up to the nearest whole tile.
5. Total Tile Area Purchased (sq ft) Total Area = Tiles Needed × (Tile Length / 12) × (Tile Width / 12)
#### Assumptions & References
- Room dimensions are entered in feet; tile dimensions in inches.
- A 10% waste factor is the industry standard for straight-lay patterns; diagonal or herringbone layouts typically require 15–20%.
- The default grout joint of 1/8 inch (0.125 in) is common for rectified tiles; larger tiles often use 3/16 in or wider joints.
- Box coverage of 20 sq ft is used as a reference estimate only — verify the actual coverage on your tile packaging.
- This calculator assumes a rectangular area. For irregular shapes, break the area into rectangles and sum the results.
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