Last updated: June 1, 2026

Paint Cost Calculator

Calculate how much paint you need and estimate the total cost for your room, accounting for doors, windows, and coats.

Room Length (ft)

Room Width (ft)

Wall Height (ft)

Doors

Windows

Coats

Paint Price ($/gallon)

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320 × 100 Mobile Banner

336 × 280 Large Rectangle

300 × 250 Medium Rectangle

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About 350-400 square feet per gallon for one coat, depending on surface texture and paint quality.

Two coats is standard. One coat may suffice when painting over a similar color with high-quality paint.