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Add square footage for several rooms or walls, subtract doors (about 21 sq ft each), windows and cabinets, and get one total ready for ordering tile.
With these inputs:
| Result | Value |
|---|---|
| Net tileable area | 160 sq ft |
| Total measured area | 160 sq ft |
| Deductions | 0 sq ft |
| Order with 10% waste | 176 sq ft |
| Order with 15% waste | 184 sq ft |
Take the waste-inclusive number to the store — tile is sold in full boxes.
<> Area = width × length, in feet. Convert inches to a decimal first: 10 ft 6 in is 10.5 ft. Measure the widest points of the room, not the doorway. What to subtract: permanent cabinets, tubs, islands, and any area under a fixed appliance. What not to subtract: small doorway notches and toe kicks — those add cuts, not savings. For walls, multiply wall width by wall height and subtract windows and doors over about 10 sq ft. Anything smaller is absorbed by your waste factor.
Yes if the cabinets are already installed and staying. No if you are tiling the whole floor before cabinets go in, which is common in new builds and makes future remodels easier.
Split it into two rectangles, measure each separately, and add them. That is exactly what the multiple-areas rows above are for.
Yes — a curb and niche add surprisingly real square footage plus lots of small cuts. Use the shower tile calculator to handle them properly.
Need the whole roof at once? The free roofing calculator works out roof area, squares, shingle bundles, underlayment, drip edge, ridge cap and installed cost from one set of measurements.