Flooring Calculator
Work out how much flooring material and how many boxes you need, with wastage.
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Work out flooring quantities in minutes, on site
Add every room, set your wastage allowance and box coverage, and this calculator gives you the total area, the area including waste, how many boxes to order and the estimated material cost — in metric or imperial.
How to use it
- Add each room's length and width, choosing the unit for each.
- Set a wastage allowance — 10% is a common starting point, more for diagonal or complex layouts.
- Enter the coverage per box and the price per square metre or square foot to get a material cost estimate.
The formula
Worked example
A 4m × 3m room (12 m²) with 10% wastage needs 13.2 m² of flooring. At 2.2 m² per box, that's 6 boxes. At $45/m², estimated material cost is $594.
Frequently Asked Questions
How much wastage allowance should I use?
10% is a common default for straightforward rectangular rooms. Increase it for diagonal layouts, herringbone patterns, lots of cuts around fixtures, or offcuts you can't reuse.
Can I add more than one room?
Yes — use 'Add Another Room' for as many rooms as you need. All room areas are combined before wastage and boxes are calculated.
Does this account for pattern matching or plank direction?
No — it's a straightforward area-based estimate. For patterned or directional installs, add extra wastage to cover extra cuts.