Paint Calculator
Estimate paint for walls and ceilings with various paint types.
Ceiling Area
Tip
What is Paint Calculator
Estimate paint for a room from length × width × wall height, subtracting each door and window by its real size rather than a rough factor, with an optional ceiling toggle. Pick coats, paint type, coverage per liter and waste to get liters, bucket count and a full budget including labor.
How to use Paint Calculator
- Enter room length, width and wall height; toggle ceiling if needed
- Add door and window counts and sizes, coats, coverage and waste
- Calculate to see paintable area, liters, buckets and cost
Frequently asked questions
Does it deduct doors and windows?
Yes — enter how many doors and windows and their dimensions; their area is subtracted from the paintable surface.
How does the bucket estimate work?
Liters needed are divided by your bucket size and rounded up — always round up, since partial buckets cannot be bought.
How many coats should I plan for?
The usual recipe is one primer coat plus two topcoats; covering a dark wall with a light color can take two to three topcoats. The tool multiplies area by your coat count directly.
Should I include the ceiling?
Only if it gets the same paint — leave the toggle off for suspended ceilings or a different color. When enabled, length × width is added as one extra surface to the paint volume and cost.
Is Paint Calculator free?
Paint Calculator is completely free — open the page and use every feature with no hidden charges.
Do I need to download or install Paint Calculator?
No download or installation is needed. It is an online tool that runs in the browser on your phone, tablet and computer.
Do I need an account to use Paint Calculator?
No. Use the tool right away — no account or sign-in required.
Does Paint Calculator work on mobile?
Yes. The page is fully responsive and works on phones, tablets and desktop browsers.