Flooring Calculator Guide
Calculate room floor area, add cutting waste and convert the result into the number of flooring packages to purchase.
Open calculatorMeasure first. The formula does the rest.
Use consistent units for every measurement. Keep the original values precise; only round the final quantity you plan to buy.
See the calculation change
This is an interactive example, not a replacement for checking the material manufacturer's specifications.
How the calculation works
Packages = (Room area × (1 + Waste%)) ÷ Package coverage
Measure room length and width at the finished floor area.
Multiply area by your chosen waste allowance.
Divide by package coverage and round up to a whole package.
Before you buy
- ✓Use the coverage printed on the exact flooring package.
- ✓Allow more waste for complex layouts, diagonal patterns or rooms with many cuts.
- ✓Keep spare boards if the manufacturer recommends retaining a matching batch.
Common questions
How much flooring waste should I allow?
The correct allowance depends on the room shape and installation pattern. The calculator leaves it to you rather than assuming one number.
Why do I need package coverage?
Flooring is normally sold by package. Coverage varies by product, board size and package contents.
Should I measure wall-to-wall?
Measure the actual floor area you intend to cover, accounting for permanent areas that will not receive flooring.