Paint Calculator
NEWCalculate how much paint you need for walls and ceilings. Enter room dimensions, number of doors and windows, coats, and coverage rate to get an accurate estimate.
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How to use Paint Calculator
- Enter room dimensions (length, width, ceiling height) and number of rooms.
- Add the number of doors and windows to subtract their area from the total.
- Set the number of coats, coverage per gallon, and price per gallon, then click Calculate.
What is Paint Calculator?
A paint calculator estimates how many gallons of paint are needed for a room or project. It accounts for wall area minus openings (doors and windows), number of coats, and the coverage rate of your chosen paint.
Standard interior paint covers about 350 square feet per gallon. This calculator helps you avoid buying too much (wasting money) or too little (requiring extra trips to the store and potential color matching issues).
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FAQ
- How much does a gallon of paint cover?
- A gallon of interior paint typically covers 350-400 square feet with one coat. Textured surfaces may reduce coverage to 250-300 sq ft.
- How many coats of paint do I need?
- Most walls need 2 coats for even coverage. Dark-to-light color changes or new drywall may require a primer coat plus 2 finish coats.
- Should I paint the ceiling?
- Ceilings typically need 1-2 coats. Check the 'Include ceiling' box to add ceiling area to your estimate.
- What size opening should I subtract for doors and windows?
- Standard doors are about 21 sq ft and standard windows about 12 sq ft. The calculator uses these averages.
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