Paint Calculator
Estimate gallons of paint needed for your walls, with doors, windows and coats factored in.
Paint needed (gallons)
2
Breakdown
- Paintable area (ft²)
- 395
- 5-gal buckets
- 1
Last updated:
FAQ
How much area does one gallon cover?
Typically 350–400 ft² per coat on primed drywall. Textured or bare surfaces absorb more — plan 300 ft² for rough walls.
Do I need primer?
Yes over new drywall, repairs, or big color shifts like dark-to-light. Primer blocks stains and can save an entire extra finish coat.
How do I estimate paint for ceilings and trim?
Run this calculator twice: ceiling area = length × width, usually one coat; trim ≈ perimeter × 0.5 ft, with ~400 ft² coverage per gallon per coat.
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