Flooring Calculator
Boxes of flooring needed for a room, including waste allowance.
m
m
m²
%
Boxes to buy
10
covers 22 m²
Floor area
20m²
With waste
22m²
Spare after fitting
2m²
ShowHide the working
- 1Area = 5 × 4 = 20 m²
- 2+ 10% waste = 22 m²
- 3÷ 2.2 m²/box, rounded up = 10 boxes
Formula
boxes = ⌈area × (1 + waste) ÷ box coverage⌉How it works
Turns a room's area into whole boxes of flooring, with a waste allowance for cuts and offcuts.
Example
A 5 × 4 m room at 2.2 m²/box with 10% waste needs 10 boxes.
About the Flooring Calculator
Boxes of flooring needed for a room, including waste allowance. It sits in the Home & Construction section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Flooring Calculator free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Flooring Calculator runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Flooring Calculator on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Home & Construction?
- Paint, tile, concrete, flooring, lumber and material estimates. You can browse the full Home & Construction category for related calculators.