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Work out how much paint your walls or ceiling need. Enter the area (or the room dimensions), the number of coats and the coverage printed on the tin — the calculator gives you the litres and suggests which tins to buy.

Calculate walls and ceiling from the actual room shape.
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walls or room
usually two
m² per litre
for losses
litres to buy
Paint per colour = area × coats / coverage × (1 + allowance/100). Packages are selected separately for each product.Worked example
Worked example using the form's default values.
Enter consumption, coverage, dimensions and pack sizes from the product label or data sheet. A preset fills editable fields; the calculation uses the values you enter.
The requirement includes your allowance. Purchase quantities round up to whole pieces or packages; purchase surplus is not another allowance to add.
The result estimates quantities. Check structural layout, system compatibility and installation in the design and manufacturer documentation.
Yes. Additional surfaces or sections are summed within the chosen scope. Do not enter the same element twice. Purchase different colours and products separately.
No. Amounts come from your inputs. Enter your supplier quote; a zero price omits the cost estimate and does not mean free material.
Paint consumption depends on the area, the number of coats and the coverage of the specific product printed on the tin. Absorbent, uneven or strongly coloured substrates increase consumption. The calculator gives the litres and a suggested set of tins, but the paint's data sheet has the final word.