Paint calculator
Enter the room's size, its doors and windows, and how many coats. You'll see the paint for the walls and the ceiling, in gallons or litres.
ft
ft
ft
sq ft
sq ft
sq ft
Walls
1.8 gallons
316 sq ft to paint · buy 2 gallons
Ceiling
0.7 gallons
120 sq ft · buy 1 gallon
Total
2.5 gallons
Buy 3 gallons
See it to scale: draw the room in DrawPlans, place furniture at its real size and walk through it in 3D.
Draw your floor plan freeHow it’s calculated
- Wall area is the distance around the room (twice the length plus twice the width) times the wall height.
- Each door and window is taken off the wall area: about 21 sq ft (1.95 m²) for a door and 15 sq ft (1.39 m²) for a window, unless you change them.
- Paint is the area times the coats, divided by what one gallon or litre covers: about 350 sq ft a gallon, or 8.5 m² a litre.