Roof Pitch Calculator
Free online Roof Pitch Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Pitch = Rise / Run (as ratio, e.g., 6:12). Angle = arctan(Rise/Run). Slope% = (Rise/Run) x 100. Minimum pitch varies by roofing material.
Example Calculations
Standard Pitch
Input: Rise: 6 inches, Run: 12 inches
Result: Pitch: 6:12, Angle: 26.57 degrees, Slope: 50%
Low Slope
Input: Rise: 3 inches, Run: 12 inches
Result: Pitch: 3:12, Angle: 14.04 degrees, Slope: 25%
From Angle
Input: Angle: 30 degrees
Result: Pitch: 6.93:12, Slope: 57.7%
About This Calculator
Free online roof pitch calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our roof pitch calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
Related Calculators
Frequently Asked Questions
What is roof pitch?
Steepness as rise:run ratio. 6:12 means 6 inches rise per 12 inches horizontal.
Measure roof pitch?
Place level horizontal against roof, measure vertical distance from 12-inch mark to roof.
Minimum pitch for materials?
Asphalt: 2:12. Metal: 3:12. Flat roofs: 1/4:12 for drainage.
Pitch and costs?
Steeper = more materials, safety equipment, labor. 8:12 costs significantly more than 4:12.
Pitch to degrees?
angle = arctan(rise/run). 6:12 = arctan(0.5) = ~26.57 degrees.