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.
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