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Paint Calculator
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Coverage: 400 sq ft/gallon
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Calculate paint needed for rooms. Deduct doors and windows. Multiple coats and room modes. Ceiling option. Interior/exterior/primer coverage rates. Results in gallons and quarts.
How to Use
- 1Enter room length, width, and height (or just wall area for irregular rooms)
- 2Enter the number of doors and windows to subtract from the wall area
- 3Select number of coats (1, 2, or 3) and paint type (interior, exterior, primer)
- 4Check the ceiling box to add ceiling area (length × width)
- 5Click Calculate to see total area, gallons needed, and cost (if price per gallon is entered)
Features
- Wall area calculation from room dimensions
- Door and window deduction (customizable count)
- 1, 2, or 3 coats
- Paint types: interior, exterior, primer (different coverage rates)
- Ceiling area option
- Multiple rooms with names
- Results in gallons and quarts
- 100% browser-based
Frequently Asked Questions
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