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Roofing Area Calculator

Use this roofing area calculator to estimate roof surface area based on length, width, and pitch.

Formula: Length x Width x Pitch factor

Example

Formula: Length x Width x Pitch factor
= 8 m x 6 m x 1.1 pitch factor
= 52.80 m²

Enter length and width units and a pitch factor, then the result will be in m².

Tip: Choose your result unit on the right before calculating.

Step-by-step calculation

  1. Enter a pitch factor for slope and calculate to see roof area in m².

FAQ

What is pitch factor?
It adjusts area for roof slope; steeper roofs need more.
Where to find pitch?
Use a roof pitch chart or building plans.

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