Calculate exact wall paint square footage instantly. Enter room dimensions below for precise paint requirements in square feet. Includes adjustments for doors, windows, and multiple coats. Perfect for 12×12 rooms and standard wall sizes.
Rectangular Room
L-Shaped Room
Room with Bay
Room with Alcove
A simple rectangular room with four walls
Measure each dimension at multiple points and use the largest measurement for accurate results.
For 2 coats of standard paint
For one coat of primer
Approximate time to complete
Add 10% extra paint for touch-ups
Allow paint to dry between coats
Inspect surfaces between coats