Site slope calculator
Convert a measured rise and run into gradient and angle.
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Your measurements
Enter your project values. Your estimate updates as you type.
View your estimateExample values are a starting point. Check product yields and specifications before ordering.
YOUR ESTIMATE
Gradient
5%
Slope angle2.862 °
Sloping length6.007 m
Calculated from your measurements.
How it's calculated
Gradient (%) = rise ÷ horizontal run × 100. Angle = arctan(rise ÷ run).
Calculations use consistent units for your selected measurements. Whole purchase quantities are rounded up.
What this estimate includes
Use horizontal run, not the sloping distance. The result describes geometry, not an approved drainage or excavation gradient.
Quantity and arithmetic estimates only. Use project specifications for installation and design requirements.
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