HOW IT IS CALCULATED
Estimate carpet area including waste
Calculate rectangular area and add a percentage allowance for cuts, waste or spare material.
Instant resultClear formulaRuns locally
01Values
02length × width × (1 + waste ÷ 100)
03Result
5 m × 4 m with 10% waste → 22 m²
Waste allowance is added after calculating the base area
The extra percentage helps account for cuts and unusable pieces but does not change the actual room area.
02
In short
What logic does the calculator use?
length × width × (1 + waste ÷ 100)
Example?
5 m × 4 m with 10% waste → 22 m²