Paint Calculator
Calculate gallons of paint needed based on room size, paint type, and coats.
The paint calculator estimates gallons per coat and total gallons needed to cover walls and an optional ceiling. It deducts door and window areas and applies your chosen coverage rate by paint type. Use it to order the right amount without leaving multiple partial cans on-site.
- Dark colors often require 3 coats over a light base — price accordingly when bidding color changes.
- Textured surfaces absorb 20–30% more paint than smooth drywall — factor that into your gallon estimate.
- Buy all paint for a room from the same batch to avoid color variation between cans.
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