Last updated: October 2026.

PaintCalc provides planning arithmetic, and that’s the ceiling of what it provides.

Estimates, not guarantees

The gallons, litres and costs this site produces are estimates derived from the numbers you enter and the stated assumptions — coverage presets, standard opening sizes, unit conversions. Actual paint consumption varies with surface porosity and texture, color change depth, application method, temperature, and the specific product’s real spread rate. The most authoritative figure for your project is the coverage claim on your own can, which is why every rate here is editable. Buy to the plan and keep the receipt; opened and tinted paint is rarely returnable.

Not professional advice

Nothing here is contracting, decorating or safety advice. Ladder and scaffold work on tall walls and stairwells, lead-paint disturbance in pre-1978 housing (pre-1970s in many other markets), ventilation for solvent-based products, and mold or structural moisture problems are all consult-a-professional territory — no calculator substitutes for that judgment.

Product and price independence

PaintCalc has no brand relationships and no affiliate links; nothing here recommends or is paid by any paint maker. Prices used in examples and defaults are illustrative planning figures, not quotes — actual retail prices vary by brand, line, region and time.

Liability

The site is offered as-is and as-available. To the maximum extent permitted by law, we disclaim liability for decisions made from these estimates — including material purchases, project budgets, and second trips to the paint store. If the math ever disagrees with your measurements or your can’s label, trust the physical evidence and tell us so we can fix it.