Paint inputs
Plan paint purchases without overbuying too much material.
Wall area
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Paint needed
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Recommended purchase
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Paint Calculator
Estimate gallons of paint needed from room size, wall height, coats, and coverage.
Formula
Wall area = 2 x (length + width) x height. Paint needed = wall area x coats / coverage.
Example
A 14 by 12 ft room with 8 ft walls and 2 coats needs about 2.4 gallons at 350 sq ft per gallon.
Result notes
- Results are estimates based on the values you enter.
- Calculators with schedules show how values change over time.
- For financial, health, or construction decisions, compare these estimates with professional advice when needed.
Frequently asked questions
Does this subtract windows and doors?
No. This MVP estimates full wall area and gives a practical buffer.
Why round up paint gallons?
Paint is sold in fixed container sizes and extra paint helps with touch-ups.
What coverage should I use?
Many paints cover around 300 to 400 sq ft per gallon, but check the product label.