Those Boring Tools
Home & DIY CalculatorsPrivate by design

Paint Calculator

Enter room dimensions, door/window area, and number of coats to calculate how much paint you need.

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How to use this tool

  1. 1Enter room length, width, and ceiling height.
  2. 2Enter door/window area to exclude.
  3. 3Enter number of coats.
  4. 4See gallons needed.

Frequently asked questions

How much does a gallon of paint cover?+

Most paints cover about 350-400 square feet per gallon per coat — check your specific paint's label for the exact figure.

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