Roof Pitch Calculator

Roof pitch, angle and slope from rise and run.

Runs in your browser — nothing is uploaded
From
Any unit, as long as both match.

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Material estimates only — add waste, confirm quantities with your supplier and follow local building codes. Not an engineering guarantee.

How to use Roof Pitch Calculator

  1. Enter your values — the unit for each field is shown next to it.
  2. The result updates instantly as you type.
  3. Copy the results, or change inputs to compare scenarios.

Formula & assumptions

Pitch = rise ÷ run × 12

Angle = arctan(rise ÷ run)