Flooring & Tile Calculator
How it works
Room length times width gives the bare floor area. That area is inflated by the waste allowance to get the area that actually needs to be bought, since cuts and pattern-matching use more material than the floor alone. Dividing by how much a single box covers gives the number of boxes — rounded up to the next whole box, since a partial box is not something you can buy.
Frequently asked questions
Why does the box count always round up, even for a tiny fraction?
Boxes aren't sold in fractions — a store won't sell you 6.2 boxes of flooring. Rounding down would leave the last stretch of the room short, and that gap is usually only discovered after everything else is already laid, which means a second trip and a delay. Rounding up to the next whole box costs a little extra material, not a second trip.
Why add a waste allowance on top of the room area at all?
The bare floor area is not what actually gets used. Cutting boards or tiles to fit around corners, doorways and closets leaves offcuts that cannot be reused, and matching a pattern across a room uses even more, since pieces have to line up rather than just fill space. A waste allowance accounts for that before the box count is worked out, so the room does not run short partway through.
Is coverage per box the same for every flooring product?
No — it varies by product, box size and material, so there is no single number this tool can assume for you. Check the actual packaging for the coverage figure (usually printed in square feet or square meters per box) and use that, rather than guessing or reusing a number from a different product.