Flooring Calculator

How to use

1. 1Choose imperial or metric, then pick Rectangle for one room or L-shape to add two rectangles for an L-shaped floor.
2. 2Enter the room length and width measured wall to wall. For an L-shape, fill in both areas.
3. 3Set the coverage: enter the area each box covers from the carton, or switch to plank mode and enter the plank size and planks per box.
4. 4Pick a waste percent, using a higher value for diagonal or herringbone layouts and rooms with many cuts.
5. 5Read the boxes to buy, optionally add a price per box or per area for a cost estimate, then use Copy summary. Everything runs in your browser.

About this tool

Flooring Calculator works out how much plank or sheet flooring a room needs and, more usefully, how many boxes to buy, because laminate, luxury vinyl plank, engineered wood, and solid hardwood are all sold by the box rather than the single board. Each carton covers a stated area, for example twenty square feet per box, so the question that actually decides your order is not how many planks but how many whole boxes, and that is the headline number this tool reports. It is built to be different from a tile calculator on purpose. Tile is laid on a grid with a grout joint between every piece, so a tile tool has to model the grout gap; plank and sheet flooring is installed edge to edge with no grout and is priced by box coverage, so this calculator is built around coverage per box and a cut allowance instead. You start with the room, entering a single rectangle for a normal room or switching to L-shape to add two rectangles for an L-shaped floor, and you can measure in feet and inches or in metres. Coverage can be entered in two ways. The fastest is to read the coverage per box straight off the carton in square feet or square metres. If the carton lists plank dimensions and a piece count instead of an area, switch to plank mode and enter the plank length, the plank width, and how many planks are in a box, and the tool computes the per-box coverage for you and also reports the total number of planks across your order. Either way you set a waste percent, which adds extra material on top of the bare floor area to cover the cuts at the walls, the occasional mistake, and a few spare boards to keep for repairs. The presets reflect how installers actually pad an order: about five percent for a small simple square room, ten percent as the standard for a straight-laid floor, fifteen percent for a diagonal layout where angled offcuts are hard to reuse, and twenty percent for herringbone and chevron patterns or rooms broken up by closets and islands. The result panel shows the floor area, the area once waste is added, the coverage per box, the boxes to buy, the total coverage that order gives you, and the leftover coverage you will have spare, with every figure available in either square feet or square metres. An optional cost field prices the job either per box or per square foot or square metre, in any of eight currencies, charged on the coverage you actually buy rather than the bare floor so the estimate matches the till. A copy button produces a plain text summary you can paste into a shopping list or a note. Buy at least one full extra box of any floor you love and keep a couple of unopened planks, because flooring lines are discontinued often and an exact match for a damaged board is hard to find later. Every measurement, coverage figure, and price you enter is processed locally in your browser and is never uploaded, logged, or sent anywhere.

Free to use. Works in your browser. No signup, no login.