How much paint do I need for two coats?

Set "Coats" to 2 and enter the same area. The calculator multiplies your surface area by the number of coats before dividing by coverage, so the gallon estimate is for the full job.

Why is my actual coverage less than the can says?

Manufacturer numbers assume smooth, sealed, primed surfaces. Texture, porosity, drastic colour shifts, and inexperienced applicators all reduce yield. Add 10–20% wastage when any of those apply.

Should I include the ceiling area?

Only if you're painting it. Add ceiling area to total area when ceilings get the same paint. If they're a different paint or colour, run the calculator twice — once per surface — so each gets its own coverage rate.

Paint Calculator

Paint Calculator

Free paint calculator. Enter wall dimensions, opening deductions, and coat count to estimate gallons with coverage and price controls for accurate orders.

April 19, 2026

Paint Calculator

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