Paint Calculator
Estimate paint required from wall area, coverage and coats.
Calculation example
Inputs: Wall Area: 800 sq ft, Coverage per Unit: 350 sq ft, Coats: 2
Result: 4.57 units
For 800 square feet, 350 square feet of coverage per unit and two coats, the estimate is 4.57 units.
Formula
Paint quantity = wall area ÷ coverage per unit × number of coats.
How to use this calculator
Divide wall area by product coverage and multiply by the number of coats.
Before you calculate
Measure the project dimensions as accurately as practical and keep all measurements in compatible units. For material products, use the coverage, yield, density, or package size stated by the manufacturer or supplier rather than a generic assumption.
Choose the waste allowance based on the project shape, installation method, cutting requirements, and material characteristics. A simple rectangular estimate may need adjustment for openings, corners, slopes, joints, patterns, compaction, or other site conditions.
Understanding the result
The calculator provides a planning estimate based on the inputs shown above. It is not a substitute for project drawings, structural design, manufacturer instructions, or local requirements. Before ordering, compare the calculated quantity with the supplier's package sizes and ordering units.
Tips
- Use the manufacturer's stated coverage for your specific product.
- Porous or rough surfaces can require more material.
Frequently asked questions
How is paint quantity estimated?
Wall area is divided by coverage per unit and multiplied by coats.
Why can actual use differ?
Coverage varies with product and surface conditions.
Related calculators
Use compatible units and verify estimates against project specifications, local requirements and manufacturer instructions.