Construction calculator
Paint Calculator
Estimate gallons of paint needed for interior walls.
How the calculation works
Total paint needed = (area × coats) ÷ coverage. Round up to full gallons.
Example: 500 sq ft with 2 coats at 350 sq ft/gal needs 3 gallons.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, medical circumstances, structural requirements, or other project-specific factors unless explicitly stated.
Frequently asked questions
How accurate is the paint calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.