Paint Calculator

Estimate paint, primer, cans, and costs for walls and ceilings.

Measurement guide

Measure each wall, subtract doors and windows, and include ceilings only when painting them.

Record each area separately, keep units consistent, and update the estimate with a final site measurement before ordering.

Assumptions and limitations

Coverage is label coverage on a prepared surface; texture, repairs, dramatic color changes, and spraying can require more.

Prices, tax, and delivery are user-entered planning figures, not supplier quotations.

Worked example

A 12 × 10 ft room with 8 ft walls has 352 sq ft of wall area after 40 sq ft of openings. Two coats require about 704 sq ft of coverage before waste.

Frequently asked questions

What waste allowance should I use?

Simple rectangles often start at 5–10%; complex patterns, many cuts, or fragile material justify more based on the installation plan.

Why is the purchase quantity rounded up?

Packages and whole pieces usually cannot be bought fractionally, so purchasing rounds up while the exact quantity remains visible.

Can I order directly from this result?

Not without verification. Re-measure, check the product label, batch and stock, and confirm with the supplier or a qualified professional.

What does the cost estimate include?

Material cost uses the rounded purchase quantity, then adds entered labor, delivery, and tax; unlisted accessories are excluded.