AREA
Paint Area Calculator: Walls and Ceiling in Sq Ft
Calculate the paintable area of a room: walls from length, width and height, doors and windows deducted, ceiling optional.
Assumptions used EDIT ▾
sq ft
A 7 × 3 ft door is 21 sq ft.
sq ft
A 4 × 4 ft window is 16 sq ft.
Wall area = 2 × (length + width) × height, for each room, minus openings. Areas are measured surfaces; add extra if walls are uneven or textured.
AREA TO PAINT
403sq ft
- Walls
- 440 sq ft
- Doors & windows deducted
- − 37 sq ft
Area to paint403 sq ft
How it’s calculated
Wall area = 2 × (length + width) × height − doors − windows (+ ceiling)
Example: A 12 × 10 × 10 ft room with 1 door and 1 window: 440 − 21 − 16 = 403 sq ft.
Estimates for planning, based on the assumptions shown. They are not a guarantee of quantities or professional engineering advice; check critical work with a qualified professional.