How to Calculate Paint Gallons
What is Paint Gallons?
Paint Gallons Calculator helps contractors and tradespeople accurately size, spec, and estimate materials and systems.
Formula
Gallons = Area / Coverage per Gallon (typically 350 sf)
Step-by-Step Guide
- 1Calculate paintable area, subtract windows/doors, divide by coverage
- 2Apply the formula using your project measurements
- 3Add required safety factors or waste allowances per code
Worked Examples
Input
1200 sf walls, 400 sf coverage per gallon
Result
Gallons = 1200/400 × 2 coats = 6 gallons
Common Mistakes to Avoid
- ✕Not applying code-required safety factors or derating
- ✕Forgetting to account for waste and cut losses in material estimates
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