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United States · square feet / US gallons / USD

Ceiling paint calculator — square feet & gallons

Calculate US ceiling paint using measured square feet, coats and coverage per gallon. Compare whole containers using manufacturer specifications or your own label.

Room walls and ceiling shown separately, with a window deducted from wall area
Measure walls and ceiling separately. Subtract openings from their own surface.

Make your painting plan

1. Measure your surfaces
Room 1

Enter ceiling openings as an area to subtract. Each row is a separate rectangular ceiling. For sloped or irregular ceilings, enter their measured paintable area.

0% is the starting assumption. Adjust for your application and keep coats separate from this allowance.

2. Ceiling paint

Available container sizes

Keep all sizes the same formulation, colour and finish. Leftover primer cannot replace finishing paint.

Your shopping list will appear here. Review dimensions, coats and the current label before buying.

Multiple rooms share one wall colour and product. Calculate different colours as separate projects. Quantity estimates do not establish primer/topcoat compatibility.

Ceiling paint has its own quantity

A flat rectangular ceiling uses length × width, minus any ceiling openings. Wall height and door/window deductions do not affect that ceiling area. For sloped or irregular ceilings, enter their measured paintable area.

A 12 × 10 ft ceiling is 120 sq ft. At 300 sq ft per US gallon and two coats, it needs 0.8 US gallons before extra allowance.

Coverage and coats change the result

Paintable sq ft × coats ÷ coverage per US gallon
Apply your optional extra allowance, then round to available containers.

Manufacturer ranges use their lower coverage value by default. A quoted “up to” coverage is not a guarantee on every surface. Check porosity, colour change, application method and preparation; adjust the form to your current label.

Are the displayed prices current?

Store prices are dated snapshots. After seven days, product-based costs are withheld; quantities remain available for up to 30 days before specifications also need a refresh. Manual details use the numbers you enter.

Can I mix litres and US gallons?

Choose the matching country tool and label units. A US gallon and an imperial gallon are different. This pilot does not convert a UK product into a US product or combine their offers.

US paint & primer sample

Recorded coverage is a planning input. Product selection does not approve it for your surface or another coating. UK prices cover a small Wickes sample; US records contain manufacturer specifications, with prices entered by you.

Product specifications and source links; no reviews or suitability rankings
Recorded productCoverage per coatRecorded coatsContainer sizesPriceSource
Valspar Signature® Interior Paint + Primer — source product photoValspar Signature® Interior Paint + Primer200–400 sq ft/US gal20.25, 1.0, 5.0 US galNo verified store priceValspar manufacturer ↗
Valspar Ultra® Interior Paint + Primer — source product photoValspar Ultra® Interior Paint + Primer300–400 sq ft/US gal20.25, 1.0, 5.0 US galNo verified store priceValspar manufacturer ↗
Valspar® Core™ Interior Paint + Primer — source product photoValspar® Core™ Interior Paint + Primer400 sq ft/US gal11.0, 5.0 US galNo verified store priceValspar manufacturer ↗
Valspar Signature® Ceiling Paint + Primer — source product photoValspar Signature® Ceiling Paint + Primer300–400 sq ft/US gal11.0, 5.0 US galNo verified store priceValspar manufacturer ↗
Valspar® Ultra Ceiling Paint + Primer — source product photoValspar® Ultra Ceiling Paint + Primer400 sq ft/US gal21.0, 5.0 US galNo verified store priceValspar manufacturer ↗
Valspar® PVA Primer/Sealer — source product photoValspar® PVA Primer/Sealer300–400 sq ft/US gal11.0, 5.0 US galNo verified store priceValspar manufacturer ↗
Valspar® High-Hiding Primer/Sealer — source product photoValspar® High-Hiding Primer/Sealer300–400 sq ft/US gal11.0, 5.0 US galNo verified store priceValspar manufacturer ↗