Estimate paint quantity, coats, waste and purchase sizes.
Enter your room, openings and paint coverage to get a purchase-ready estimate including coats, contingency, containers and optional cost.
Includes your selected coats and contingency allowance.
Actual coverage depends on the paint, color change, surface texture, porosity and application method. Use the product label's coverage rate whenever available.
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Estimate how much paint to buy for a room or individual wall, then round the result into real container sizes instead of stopping at raw area.
PlanCalq calculates the paintable surface area, subtracts the selected door and window area, and multiplies the remaining area by the number of coats.
The coated area is divided by your paint coverage rate to estimate the liquid quantity. Contingency is then added and the result is rounded up to the container size you entered.
Paintable area × coats ÷ coverage = base paint quantityBase quantity × (1 + contingency %) = recommended quantityRecommended quantity ÷ container size = containers to buy (rounded up)A modest contingency can help cover absorption, touch-ups and measuring differences. Use a larger allowance for rough surfaces, strong color changes or complicated rooms.
For a more realistic wall estimate, deduct larger openings. Small openings can sometimes be left in as a simple built-in allowance.
Paint is purchased in fixed container sizes. Rounding up produces a shopping quantity rather than an impractical fractional can.