CONSTRUCTION TOOL

Slope Percentage Calculator

Calculate grade percentage and angle from vertical rise and horizontal run.

FREE ONLINE TOOL

Vertical rise (same unit as run)Horizontal run

Slope (%)

Angle (°)

5.710593

Slope (%) = rise / horizontal run × 100; angle = atan(rise / run)

Run is the horizontal distance, not the sloped length. Negative rise means downhill.

STEP BY STEP

How to use slope percentage calculator

IN PRACTICE

1 / 10 × 100 = 10%; angle ≈ 5.71°.

GOOD TO KNOW

Run is the horizontal distance, not the sloped length. Negative rise means downhill.