Paint Calculator m2

About Paint Calculator m2

When you have already measured the surface, entering the area directly is quicker and less error prone than re-entering room dimensions and letting the tool derive it. This page starts in known area mode: put in the square metres, set the coverage from your tin and the number of coats, and read off the litres. The arithmetic is simply area divided by coverage, multiplied by coats. At the standard 10 square metres per litre, 50 square metres over two coats needs 10 litres. This mode is also the one to use for surfaces that do not fit a room shape at all: a stairwell, an L-shaped or open plan space, a gable end, a garage door, or the total of several small areas you have already added together. Coverage is the number most worth checking rather than assuming. Ten square metres per litre is typical for interior emulsion on a smooth prepared wall, but textured surfaces, bare plaster and masonry all take considerably more, and the figure printed on your tin is measured under ideal conditions. For room dimensions instead see Paint Calculator, and for the reverse question see How Much Does 5 Litres of Paint Cover.

How to use Paint Calculator m2

  1. Enter room length, width, and wall height in metres
  2. Set the number of doors and windows to subtract their area
  3. Choose number of coats and see litres and gallons needed

Frequently Asked Questions

How many litres of paint per square metre?
At the common coverage of 10 square metres per litre, one square metre needs 0.1 litres per coat, so 0.2 litres for two coats. Multiply your area by that and you have the answer, which is exactly what this calculator does.
How much paint for 50 square metres?
About 5 litres for one coat and 10 litres for two, at 10 square metres per litre. On bare plaster or a textured surface with coverage nearer 7, the same area needs about 14 litres for two coats.
Why enter the area directly instead of room dimensions?
Because for anything that is not a plain rectangular room, deriving the area from dimensions either does not work or introduces mistakes. Stairwells, L-shaped rooms, gable ends and part walls are all easier to measure once and enter as an area.
What coverage figure should I use?
The one printed on your tin, since products differ. Ten square metres per litre is typical for interior emulsion on smooth prepared walls. Bare plaster, textured surfaces and masonry all take more, so reduce it rather than trusting the default.
Does the tin coverage figure allow for two coats?
No. Coverage is always quoted per coat. Set the coats option to the number you actually intend to apply and the calculator multiplies for you.

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