Paint Coverage Calculator
Find how many gallons of paint you need from wall area, doors, windows and coats.
How to use
Enter your wall area and details, then click Calculate. Everything runs in your browser — nothing is uploaded or stored.
Frequently asked questions
How much paint for a 12×12 room?
Roughly 1.5–2 gallons for two coats, depending on doors and windows.
How far does one gallon go?
About 350 sq ft per coat on smooth walls.
☕
ToolZap is free forever
Every tool runs 100% in your browser — no uploads, no signups. If a tool saved you time, consider supporting us with a small donation.
💛 Donate via PayPal