June 15, 2026

Paint Calculator

Units:

Surface: Finish: Can Size:

Rooms & Dimensions

Include ceilings for all rooms

Openings (Total for all rooms)

Total Doors

Standard: 20 sq ft each

Total Windows

Standard: 15 sq ft each

Trim/Baseboard (ft) optional

Linear feet of trim to paint

Custom Door Size (sq ft)

Custom Window Size (sq ft)

Color Change Difficulty

Affects recommended coat count

Waste Factor (%)

Paint & Cost Settings

Number of Coats

Coverage Rate (sq ft/gal)

Price per Gallon ($) optional

Include primer in calculation

Results

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Total Paintable Area

sq ft

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Paint Needed

gallons

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Cans to Buy

1-gallon cans

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Est. Paint Cost

USD

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Primer Needed

gallons

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Trim Paint

gallons