Paint Calculator
Calculate paint needed for any room
🔒 Files never leave your browser
How to Use Paint Calculator
Enter room size
Enter length, width, and height.
Subtract openings
Enter number of doors and windows.
Get estimate
See gallons/liters needed with coats.
Why Choose AllTools Paint Calculator?
- ✓ Wall area calculation
- ✓ Door/window deduction
- ✓ Multiple coats
- ✓ Gallons and liters
- ✓ Coverage rate adjustable
- ✓ No data stored
Why Use This Tool
- ★ All calculations happen in your browser — no data shared
- ★ Completely free with no usage limits
- ★ No account or registration required
- ★ Practical results for real-world home projects
- ★ Works on any device including phones on-site
Related Resources
Frequently Asked Questions
How much does a gallon cover? ▼
One gallon covers approximately 350-400 sq ft. Two coats are recommended for most applications.
Does it account for doors and windows? ▼
Yes. Enter the number of doors and windows and the calculator deducts their area from the total wall surface before estimating paint.
Does this work on mobile? ▼
Yes. All AllTools tools are fully responsive and work on phones and tablets.
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