Flooring & tile packs
Calculate how many packs of laminate, wood flooring or tiles to buy from room area, cutting waste and pack coverage.
Open calculatorWall paint needed
Subtract windows and doors from wall area, multiply by coats, divide by coverage (m²/L), then add waste. Subtract leftover paint and round the amount to buy divided by tin size up to whole tins. The default 10% waste allowance also applies to older links without a waste parameter.
m²
m²
Allow for splashes, absorption into the surface and touch-ups. Use a higher allowance for absorbent plaster.
%
l
l
Number of tins
2
Paint to buy (L)
8.8
Paint needed with waste (L)
8.8
Area to paint (m²)
40
Paint remaining after painting (L)
1.2
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Formula: (wall area − windows and doors) × coats ÷ coverage × (1 + waste/100). After subtracting leftover paint, round up to whole tins; remaining paint is litres bought in tins minus litres to buy. Default waste is 10%, including for older links.
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Educational estimate only. Not medical, tax, legal or financial advice.