How much paint for a 10x10 room?

A 10x10 room with 8-foot ceilings requires approximately 1.5 gallons for two coats on walls. Add 0.4 gallons if painting the ceiling.

How do I calculate paint for custom room sizes?

Use our room paint calculator by entering your room's length, width, and height. The calculator automatically accounts for doors and windows and provides instant results.

Room Paint Calculator - Calculate Paint for Any Room Size

Calculate exact paint needed for 12x12, 10x10, or any custom room size. Get instant results in gallons with coverage tips.

Room Dimensions

Enter your room measurements to calculate paint needed

Length (ft)

Width (ft)

Height (ft)

Include ceiling in calculation

Tips for Accurate Calculation

•Measure from floor to ceiling, including any crown molding
•Account for windows and doors (already subtracted in calculation)
•Add 10-20% extra paint for touch-ups and coverage variations
•Coverage may vary by paint brand, texture, and application method
•Dark colors may require an additional coat or primer

Standard Coverage

1 gallon typically covers 350-400 square feet with one coat. Coverage varies by paint type, surface texture, and application method.

Frequently Asked Questions

How much paint do I need for a 12x12 room?

For a 12x12 room with 8-foot walls, you'll need about 2 gallons of paint for two coats on the walls. If painting the ceiling, add approximately 0.5 gallons for a total of 2.5 gallons.

How do I calculate how much paint I need?

To calculate paint needed, measure your room's length, width, and height. Calculate the wall area (perimeter × height), subtract window and door areas, add ceiling area if needed, then divide by paint coverage (typically 350 sq ft per gallon). Multiply by the number of coats needed.

How many gallons of paint do I need per room?

A typical 12x12 room with 8-foot ceilings requires about 2 gallons for two coats on walls. Smaller rooms (10x10) need about 1.5 gallons, while larger rooms (15x15) may need 3-4 gallons. Always add 10-20% extra for touch-ups.

Should I include the ceiling in my paint calculation?

Yes, if you're painting the ceiling, include it in your calculation. Ceiling area = length × width. Typically, a 12x12 room ceiling adds about 0.5 gallons for two coats. Ceilings often require a different type of paint (ceiling paint) which is specifically designed for overhead surfaces.

Painting multiple rooms or need more options?