Wall Area Calculator

The paintable and paperable wall area of a room, with doors, windows and a waste allowance taken off.

Room length m

Room width m

Wall height m

Floor to ceiling, or floor to the picture rail if only the lower band is being decorated.

Doors to deduct

About 1.9 square metres each, both faces.

Windows to deduct

About 1.4 square metres each.

Extra wall area to add sq m

Chimney breasts, alcoves or a wall that is not part of the rectangle. Add it here rather than guessing.

Include the ceiling

Ceiling paint is a different product, so the area is reported separately as well.

Waste allowance %

Five percent for paint, ten for wallpaper or paneling where whole drops can be lost.

Reset

Free calculator by Handcraft worked examples and methodology No account, nothing stored.