Roof Pitch Calculator — Calculate Roof Angle, Rise & Run Instantly

Roof Pitch Calculator — Calculate Roof Angle, Rise & Run Instantly

Free online Roof Pitch Calculator. Enter rise and run to instantly calculate pitch ratio, angle in degrees, and rafter length multiplier.

🏠 Roof Pitch Calculator

💡 Pro Tip

A steeper pitch (6/12 or higher) sheds rain and snow more effectively, but increases material costs. A lower pitch is cheaper but requires better waterproofing membranes.

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Frequently Asked Questions

Q: What is a good roof pitch?

A standard roof pitch is between 4/12 and 9/12. Anything below 2/12 is considered a low-slope or flat roof, while 12/12 means a 45-degree angle.

Q: How do I calculate roof pitch?

Roof pitch = Rise / Run. For a roof that rises 6 inches over 12 inches of horizontal run, the pitch is 6:12.

Q: What is a 4/12 roof pitch in degrees?

A 4/12 pitch is approximately 18.43 degrees.

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