Paint Calculator
Estimate paint needed for walls, ceilings, and trim
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Helpful Tips
- One gallon covers approximately 350-400 sq ft
- Always apply at least 2 coats for best coverage
- Dark-to-light color changes may need a primer coat
- Buy all paint at once to ensure color consistency
Formula Used
Gallons = (Total Wall Area - Window/Door Area) × Coats ÷ Coverage RateAbout This Calculator
Calculate how many gallons or liters of paint you need for your room. Accounts for doors, windows, number of coats, and paint coverage rate to give you an accurate estimate.