Explore our collection of 150+ developer tools, PDF editors, and image converters. Everything runs locally in your browser.
Ubify Financial Advisory Board
FINANCIAL ANALYSTS & CPA REVIEWERS
About This Tool
Paint Coverage & Gallons Calculator is an interactive online calculator on ubifytools.com. Calculate interior wall paint coverage and gallons required based on room perimeter, ceiling height, door and window surface deductions, and coat counts.
Fast, 100% free, private client-side processing directly in your browser with zero server data storage.
How to Use
- 1
Enter your parameter values into the input fields.
- 2
Adjust optional settings or unit parameters.
- 3
View real-time calculated metrics and breakdown statistics.
- 4
Copy the results summary or print your report for documentation.
Frequently Asked Questions
How much wall area does one standard gallon of paint cover?
One standard gallon of interior latex or acrylic paint covers between 350 and 400 square feet on smooth primed drywall.
Why are doors and windows deducted from the room area?
Standard interior doors average 21 square feet and windows average 15 square feet. Deducting non-painted openings prevents overestimating paint requirements.
Is any room dimension or home improvement data stored or uploaded?
No. All calculations run client-side in local browser memory.