Paint Calculator
Free paint calculator to estimate how many gallons of paint you need. Enter room dimensions, doors, and windows for accurate coverage estimates.
How to Calculate Paint Needed
- 1 Enter your room dimensions (length, width, height)
- 2 Specify the number of doors and windows
- 3 Select the surface type and number of coats
- 4 Choose paint coverage rate per gallon
- 5 View the total gallons needed for your project
🔒 Instant results, faster than AI. No signup. 100% private.
Last updated: January 15, 2026 · v2.1