Roof Pitch Calculator
Convert a roof rise and run into a pitch angle and a slope percentage. Enter the vertical rise and the horizontal run in the same unit.
8 of 8 free uses remaining today
Convert a roof rise and run into a pitch angle and a slope percentage. Enter the vertical rise and the horizontal run in the same unit.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (rise = 1.2 m, run = 4 m), the results are: pitch angle 16.7 °; slope 30.0 %.
Quick reference: rise vs result
Reference table based on the example values; it is not your calculation result.
| Rise (m) | Pitch angle | Slope |
|---|---|---|
| 0.6 | 8.5 ° | 15.0 % |
| 1.2 | 16.7 ° | 30.0 % |
| 2.4 | 31.0 ° | 60.0 % |
| 6 | 56.3 ° | 150.0 % |
| 12 | 71.6 ° | 300.0 % |
| 24 | 80.5 ° | 600.0 % |
Frequently asked questions
What formula does this calculator use?
Pitch angle = atan(rise ÷ run) × 180 ÷ pi; Slope = rise ÷ run × 100. Variables: rise = rise in m, run = run in m.
What do I need to enter?
You need rise (m), run (m). Results update as you type.
What is an example result?
With the default inputs (rise = 1.2 m, run = 4 m), the results are: pitch angle 16.7 °; slope 30.0 %.
Related Tools
View allPool Volume Calculator
Estimate how much water a rectangular pool holds from its length, width and average depth. The result is shown in cubic metres and litres for dosing…
Water Tank Capacity Calculator
Work out the capacity of a round water tank from its diameter and height. The answer is in litres, so you can compare tanks or plan rainwater storage.
Fence Panels and Posts Calculator
Estimate how many panels and posts a straight fence needs. Enter the fence length and the panel width, and posts are counted as one more than panels.
Decking Boards Calculator
Estimate how many deck boards you need for a deck. Enter the deck size, board width and the gap between boards, with boards running along the length.