Different materials have different waste factors. Hardwood laid straight is about 8-10%, hardwood on the diagonal is 12-15%, and tile is 10% minimum because of cuts. The tool defaults to 10% but you can change it. The price per box turns the answer into a budget figure you can take to the store.
Calculator
Formula used
Area = length × width · With waste = area × (1 + waste%) · Boxes = ⌈ with waste ÷ box ⌉
How to use the Flooring Square Foot Calculator
- Multiply length by width for a rectangle.
- Add waste to cover cuts and breakage.
- Enter the square feet per box from the product label.
- Read the boxes needed and total cost.
About this tool
The Flooring Square Foot Calculator is built for speed and accuracy: every calculation runs in your browser, so your data never leaves your device and the result updates as you type. It works equally well on a phone, a tablet or a desktop, and it is free to use as many times as you like.
Common use cases
- Quoting a bedroom or living room.
- Comparing two flooring products per square foot.
- Calculating underlayment and pad requirements.
- Estimating material for a basement renovation.
Tips for the best result
- Use the latest figures you have - even a small change in rate or term can shift the outcome by hundreds.
- For annual figures, divide by 12 to get a monthly number you can compare with the result.
- Bookmark this page and revisit the calculation as the inputs change.
Frequently asked questions
How much waste should I allow?
8-10% for straight plank layouts, 12-15% for diagonal, and 10-15% for tile. Pattern-heavy designs need more.
Do I include closets and alcoves?
Yes, include every area that will be floored. The tool sums whatever length and width you enter.
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