Project Calculators

From This Old House

Paint & Wallcoverings

Flooring

Yard & Garden

More Tools

WALLS

Length of all walls in feet:


Round up to the nearest foot, and be sure to count all length. A room that's 12 x 15, for example, is 12 + 15 + 12 + 15 = 54 feet total in length.

Wall height in feet:


This tool assumes all walls in the room are the same height. If they're not - for example, if your room has a sloped ceiling - use this calculator twice, once for the length and height of one side of the room and once for the length and height of the other.

WINDOWS & DOORS

This calculator will automatically subtract doors and windows from the wall area and reduce the amount of wallpaper you need accordingly.

WINDOW TRIM

Window height in inches:


Window width in inches:


Number of like-sized windows:


Round up to the nearest inch on these measurements.

DOORS AND DOOR TRIM

Door height in inches:


Door width in inches:


Number of like-sized doors:


Round up to the nearest inch on these measurements.
Calculate


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