Toolyard

Roof Pitch Calculator

How to calculate roof pitch

  1. Enter the rise and run, or the angle.
  2. Add the footprint area to get the roof area, or a rafter's horizontal run to get its length.
  3. See the pitch, angle, slope and multiplier.

Frequently asked questions

What does 6/12 mean?

The roof rises 6 units for every 12 units across. That is a 26.57° angle and a 50% slope.

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