Elevation Grade Calculator

Find slope grade %, angle and ratio from rise and run.

Rise (vertical)

Run (horizontal)

Grade (%) 100

Angle (°) 45

Slope ratio 1:1

Formula: grade = rise ÷ run × 100

Step-by-step with your numbers:

1. Values used:

2. Rise (vertical) = 1

3. Run (horizontal) = 1

5. Grade = 100%

6. Angle = 45°

7. Slope ratio = 1:1

Did we solve your problem today?

Find the grade of a slope as a percentage, angle and ratio.

The math behind it

grade % = rise ÷ run × 100; angle = arctan(rise/run).

4 ft rise over 20 ft → 20% grade (1:5 ratio).

Road grade?

A 6% grade means you climb 6 ft for every 100 ft of road.