Slope Percentage Calculator
Calculate slope percentage (grade) from rise and run, convert between slope formats
Calculator
Formula & Theory
Slope Percentage Formula
Grade (%) =
Rise
Run
× 100
Alternative Formulas
Grade (%) = tan(θ) × 100
θ = arctan(Grade/100)
Ratio = Rise:Run
Common Applications
- Road and highway design
- Ramp accessibility (ADA compliance)
- Roof pitch calculations
- Drainage and grading
- Construction site planning
Frequently Asked Questions
Slope percentage, also called grade, is the ratio of vertical rise to horizontal run expressed as a percentage. It's calculated as: Grade (%) = (Rise ÷ Run) × 100. For example, a 10% grade means for every 100 units horizontal, there's a 10 unit vertical change.
Tips
- Enter the dimensions in the same unit for consistency.
- Results update automatically as you type.
- Use the unit selector to convert between different measurement systems.