How to read grade percentage
Grade percentage is the vertical rise divided by horizontal run, converted to percent.
It is commonly used for roads, ramps, and elevation analysis.
Slope / Grade Converter
Calculate grade percentage, angle in degrees, and 1:X ratio from rise and run values.
Slope / Grade Converter
Calculate grade percentage, angle in degrees, and 1:X ratio from rise and horizontal run.
Run must not be zero. Negative inputs preserve direction.
Results update instantly
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Why use the 1:X ratio
The 1:X format shows how many horizontal units are needed for one vertical unit.
It helps standardize slope communication across teams.