Project category
Painting Calculators
Estimate wall paint quantity from room dimensions, coats, coverage per gallon, and optional door and window deductions.
Tools
Painting calculators
Open a calculator to adjust dimensions, material size, waste factor, assumptions, and optional user-entered unit price.
Worked examples
Use these scenario pages when your project is close to a common size, then edit the embedded calculator inputs.
This example embeds the paint calculator with a 12 ft by 12 ft room, 8 ft walls, and two coats.
Painting How Much Paint for a 10x10 Room?This example estimates wall paint for a 10 ft by 10 ft room with one door, two windows, and two coats.
Painting How Much Paint for a Bedroom with Two Coats?This example uses a 12 ft by 14 ft bedroom with two coats, one door, and two windows to show a more realistic paint estimate.
When to use these tools
- Estimate wall paint for bedrooms, offices, living rooms, and small remodels.
- Adjust for paint coverage, number of coats, and large openings.
- Round liquid volume to a practical whole-gallon equivalent.
Common inputs
- Room width, room length, and wall height.
- Number of coats and coverage per gallon from the paint label.
- Optional door and window counts for rough area deductions.
FAQ
Do painting calculators include primer?
No. They estimate wall paint only unless a page specifically says otherwise.
Why does the result show a whole-gallon equivalent?
Paint is usually purchased in container sizes, so the calculator shows estimated liquid volume and a rounded whole-gallon equivalent.