Ceiling Area Calculator

Ceiling area = floor area (for flat ceilings).

Inputs

Result

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General calculation reads

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How to use this calculator

  • Enter L × W.
  • Enter fixture count.
  • Read paintable ceiling area.

About this calculator

For flat ceilings, ceiling area equals floor area. Subtract any large fixtures (light fixtures ~4 ft²) you won't be painting around. For vaulted/cathedral ceilings, multiply by pitch factor (use trigonometry for exact).

Frequently asked

Vaulted ceilings?+
Multiply by 1.05-1.41 depending on pitch. Or measure each side (rafter length × room width).
How many gallons of ceiling paint?+
Same coverage as walls: ~350-400 ft²/gal. Use paint-quantity-interior with ceiling area.
Texture vs flat ceiling?+
Textured uses ~10% more paint. Adjust accordingly.
Big light fixture or fan?+
4 ft² estimate for typical fixtures. Larger chandeliers up to 10 ft².
Painting around crown molding?+
Subtract crown LF × width if you're leaving it natural; add to "molding" task otherwise.

Related calculators

Floor Area Calculator
L × W = floor area in ft². For flooring orders, multiply by 1.10 (10% waste).
Wall Area for Paint Calculator
Perimeter × ceiling height − doors and windows = paintable area.
Interior Paint Quantity Calculator
Gallons needed — enter the wall area directly OR room dimensions (calculator subtracts doors/windows).
Square Footage Calculator (Rectangular)
Length × width = ft². The simplest area calc.
Drywall Sheet Calculator
Sheets needed = wall area / sheet area (32 ft² for 4×8, 48 ft² for 4×12).
Ceiling Tile Count Calculator
Tiles = ceiling area / tile area, plus grid-feet for the suspended grid.

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