Calculate exactly how much paint you need for any room or surface — interior walls, exterior, ceiling, trim, cabinets, fence or deck. Enter your dimensions and get instant results in gallons or litres. Free, accurate, no signup required.
Calculate exact gallons or litres for any room or surface. Free — no signup required.
A 12x12 room with 8ft ceilings needs 1.5 to 2 gallons for two coats on the walls only. Add another 0.5 gallons if you are painting the ceiling.
Most bedrooms need 2 to 2.5 gallons for two coats. Larger master bedrooms may need 3 gallons. Use the calculator above for your exact dimensions.
Yes. Toggle between feet and gallons or metres and litres using the unit switcher inside the calculator.
One gallon of standard interior paint covers 350 to 400 square feet on smooth walls per coat. Textured walls reduce coverage to around 250 to 300 square feet.
For previously painted walls in good condition, no. For new drywall or a major colour change, yes — one coat of primer is recommended.