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🎨 Paint Calculator

Calculate how many gallons of paint you need for your room or project. Accounts for doors, windows, and number of coats.

Project Details

Room Length (feet)

Room Width (feet)

Wall Height (feet)

Number of Doors (doors)

Number of Windows (windows)

Number of Coats (coats)

2 coats is standard

Your Estimate

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Adjust the fields to see your estimate.

Cost Breakdown

Recommended Tools & Supplies

Roller Set (9")

Cover walls fast — the main tool

Angled Brush (2.5")

Cut in corners and edges cleanly

Clean lines on trim, ceiling, and windows

Protect floors and furniture

Reach the top of walls without a ladder

Straight ceiling lines without tape

Mix paint thoroughly before rolling

Pro Tips

✓ One gallon covers about 350 sq ft per coat
✓ Dark-to-light color changes may need a primer coat first
✓ Textured walls use 20-30% more paint
✓ Buy an extra quart for touch-ups later

Prices are estimates. Links go to Amazon — we may earn a small commission at no extra cost to you.

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