Pitch--
Angle--
Estimated roof area--
Roof Pitch Calculator
Calculate roof pitch, angle, and slope factor from rise and run.
How to use this calculator
Enter the measurements or usage numbers you know, then use the result as a planning estimate. The defaults are realistic starting points, but the best result comes from replacing them with your actual product, property, trip, or equipment numbers.
Practical planning tips
- Add a reserve for waste, weather, terrain, load, or product variation.
- Check labels, local codes, manufacturer charts, and safety requirements before buying materials or operating equipment.
- Round up when a shortage would stop the job, trip, or chore.
FAQ
Roof Pitch Calculator questions
Can I use this result for buying materials?
Use it as a planning estimate, then verify against product coverage, local requirements, and the conditions on your property or trip.
Why should I add a reserve?
Real projects and outdoor conditions rarely match the perfect math. A small reserve helps cover waste, uneven ground, spills, weather, and user input error.