Flooring Calculator for Tile

5% (Minimal cuts) 10% (Standard Layout) 15% (Diagonal Layout) 20% (Complex Herringbone)

Estimation Results

Total Area: 0 sq. ft.

Tiles Required: 0 units

Waste Allowance: 0 sq. ft.

Estimated Material Cost: $0

*Calculation includes the waste factor. It is always recommended to buy 1 extra box for future repairs.

Understanding Tile Flooring Calculations

Planning a renovation requires precision to avoid overspending or running out of materials mid-project. This tile calculator helps you determine the exact number of tiles needed based on your room dimensions and specific tile size.

How to Calculate Tile Coverage

The math behind tile calculation involves three main steps:

1. Calculate Surface Area: Multiply the length and width of your room (e.g., 10ft x 12ft = 120 sq. ft.).
2. Calculate Single Tile Area: Convert your tile dimensions to feet and multiply. A 12″x12″ tile is exactly 1 square foot. A 6″x24″ tile is 0.5″ x 2″ = 1 sq. ft.
3. Apply Waste Factor: Tiles often break, or you may need complex cuts for corners. A standard 10% waste factor is recommended for straight patterns, while 15-20% is necessary for diagonal or herringbone patterns.

Real-World Example

Suppose you are tiling a bathroom that is 8 feet long by 5 feet wide using 6-inch by 6-inch tiles with a 10% waste factor:

• Room Area: 8 * 5 = 40 Square Feet.
• Tile Area: (6 / 12) * (6 / 12) = 0.5 * 0.5 = 0.25 Square Feet per tile.
• Base Tiles Needed: 40 / 0.25 = 160 tiles.
• With Waste: 160 * 1.10 = 176 tiles.

Pro Tips for Your Project

• The "Extra Box" Rule: Even after calculating waste, buy one additional full box. Dye lots change, and finding a matching tile five years later for a repair can be impossible.
• Grout Lines: For very small tiles (mosaics), grout lines significantly impact coverage. However, for standard tiles, the grout line space is usually negligible compared to the waste factor.
• Obstacles: If you have a permanent island or vanity, subtract that area from your total square footage to save on costs.

function calculateTileNeeds() { var roomL = parseFloat(document.getElementById("roomLength").value); var roomW = parseFloat(document.getElementById("roomWidth").value); var tileL = parseFloat(document.getElementById("tileLength").value); var tileW = parseFloat(document.getElementById("tileWidth").value); var waste = parseFloat(document.getElementById("wastePercent").value); var costPerSq = parseFloat(document.getElementById("costPerSqFt").value); if (isNaN(roomL) || isNaN(roomW) || isNaN(tileL) || isNaN(tileW) || roomL <= 0 || roomW <= 0 || tileL <= 0 || tileW <= 0) { alert("Please enter valid positive numbers for all dimensions."); return; } // Calculations var totalArea = roomL * roomW; var tileAreaInSqInches = tileL * tileW; var tileAreaInSqFeet = tileAreaInSqInches / 144; var baseTilesNeeded = totalArea / tileAreaInSqFeet; var wasteMultiplier = 1 + (waste / 100); var totalTilesNeeded = Math.ceil(baseTilesNeeded * wasteMultiplier); var totalAreaWithWaste = totalArea * wasteMultiplier; var wasteAmountSqFt = totalAreaWithWaste – totalArea; var estimatedCost = totalAreaWithWaste * costPerSq; // Display Results document.getElementById("resTotalArea").innerText = totalArea.toFixed(2); document.getElementById("resTileCount").innerText = totalTilesNeeded.toLocaleString(); document.getElementById("resWasteAmount").innerText = wasteAmountSqFt.toFixed(2); document.getElementById("resTotalCost").innerText = estimatedCost.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("tileResultArea").style.display = "block"; }