Ceiling Area Calculator

Use KALK.PRO's ceiling area calculator to find the total square footage of your home's ceiling by a given length and width. Ceiling area calculator - easy and free!

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How to calculate ceil area?

The ceiling is the upper surface of the room, which is also the lower part of the building envelope of the floor above. KALK.PRO's ceiling area calculator will help you quickly estimate the total ceiling area in a room by knowing the length and width of the room. The tool can only be used for square and rectangular shaped rooms, if you have a non-standard room, scroll just below. Click "Calculate" to get the result.


Ceiling area calculation formulas

  • Square ceil area formula: S = a2, where а – side.
  • Rectangular ceil area formula: S = a × b, where а, b – sides.
  • Triangular ceil area formula: S = (a × h) / 2, where а – base, h – height.

If you want to calculate the ceil area of an irregularly shaped room, you should divide it into simple shapes, perform the calculation using the above formulas and add up the values.

Ceiling area for a non-standard shaped room
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