Paint Area Calculator
Estimate paint volume from a known painted area, editable coverage and number of coats, in metric or US units.
Coverage defaults are rough references only: 10 m²/L or 375 ft²/US gal (within the 350–400 reference range). Edit coverage using your paint label and surface conditions. The area must already exclude openings you do not paint. This estimate applies the same coverage to every coat; it does not add waste, primer, or allowances for texture and absorption.
V = A ÷ r × c
Changing the unit system clears the area and restores its reference coverage. Enter area and coverage in the selected matching units; no area value is converted automatically. Results show up to 10 significant digits; paint volume conversion uses 1 US gal = 3.785411784 L.
Calculated in this browser; inputs are not uploaded.
Estimated paint volume
- L
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- US gal
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A QUICK WALKTHROUGH
How to use this tool
- Select metric or US units and enter the known painted area.
- Enter the product coverage per coat and the whole number of coats.
- Calculate the paint volume in litres and US gallons.
Coverage per coat
Coverage defaults are rough references only: 10 m²/L or 375 ft²/US gal (within the 350–400 reference range). Edit coverage using your paint label and surface conditions. The area must already exclude openings you do not paint. This estimate applies the same coverage to every coat; it does not add waste, primer, or allowances for texture and absorption.
Unit system
Changing the unit system clears the area and restores its reference coverage. Enter area and coverage in the selected matching units; no area value is converted automatically. Results show up to 10 significant digits; paint volume conversion uses 1 US gal = 3.785411784 L.
Calculated in this browser; inputs are not uploaded.
Calculated in this browser; inputs are not uploaded.
GOOD TO KNOW
Common questions
Are the reference coverage values guaranteed?
No. Actual coverage varies by paint and surface. Replace the reference with the product coverage; the formula is area ÷ coverage × coats.