Calqpro

Paint Calculator

Enter room size and number of coats to find out how many gallons of paint you need.

Enter your room dimensions, number of coats, and the number of doors and windows to calculate exactly how many gallons of paint you need. Accounts for 350 sq ft per gallon coverage (adjust to match your paint's label).

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Last reviewed: April 2026Report an error

Gallons Needed

2 gal

302 sq ft of wall area × 2 coat(s) = 604 sq ft total. You need 2 gallon(s) (8 quarts).

Wall Area

302 sq ft

Ceiling Area

0 sq ft

Gallons (rounded)

2 gal

Quarts

8

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How to Use This Paint Calculator

  1. Enter room length, width, and ceiling height in feet.
  2. Enter the number of coats (typically 2 for walls).
  3. Enter the number of doors and windows to subtract from wall area.
  4. Toggle ceiling paint if you are painting the ceiling too.
  5. Read gallons needed, rounded up to the nearest half-gallon.

Frequently Asked Questions

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