Free tool
Slope and Gradient Calculator
Convert between percent, ratio (1:n) and degrees, and work out the rise over a given length.
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Percent
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Ratio
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Degrees
Rise over a length
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Rise or fall (m)
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Horizontal length (m)
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Slope length (m)
Percent = rise ÷ run × 100 · ratio 1 : n means 1 unit rise in n units of run · degrees = arctan(rise ÷ run).
Indicative result, not a survey. Only a plan prepared and signed by a registered surveyor is valid for title, legal or design purposes.
Calculated in your browser. Nothing you enter is stored or sent.
How it works
Gradients describe the same slope in different ways. Road and drainage designs often use percent or 1 : n; earthwork batters often use ratios; instruments may show degrees.
Next step
Turn this estimate into a survey
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