Slope and Grade Calculator

Calculate slope percentage and grade

Slope & Grade Calculator

Height difference (any unit)

Horizontal distance (same unit as rise)

Common Applications:

• ADA ramps: max 2% (1:50) • Driveways: 10-15% • Walkways: 5% max • Drainage: 1-2% minimum

Slope Results

Slope Percentage

16.67%

Angle (degrees)

9.46°

Ratio

1.00:6.00

Suitable For:

  • Steep slope - stairs recommended

Calculation Breakdown:

• Rise (vertical): 2 units

• Run (horizontal): 12 units

• Slope percentage: (2 ÷ 12) × 100 = 16.67%

• Grade angle: arctan(2 ÷ 12) = 9.46°

• Simplified ratio: 1.00:6.00

💡 Pro Tip:

For proper drainage, aim for a minimum 1-2% slope away from buildings. For wheelchair ramps, the maximum allowed slope is 1:12 (8.33%). Always check local building codes for specific requirements. Slopes over 25% may require retaining walls or terracing.

About Slope and Grade Calculator

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