Building tool
Ramp Slope Calculator
Calculate ramp slope, angle, required run, and landing count from rise and ratio.
Runs in your browserResult
- Required sloped run
- 30 ft
- Slope
- 1:12
- Grade
- 8.33%
- Angle
- 4.76°
- Ramp sections
- 1
- Total length with landings
- 30 ft
Accessibility and building rules also govern maximum rise, landings, handrails, edge protection, width, surface, and clearances. Verify local code.
How to use this ramp slope calculator
- Measure the project, enter the dimensions in the units shown, and add the waste, spacing, coverage, or material settings that apply.
- Review the calculated totals, units, and assumptions. Check the inputs and units before relying on the result.
- Change one input at a time to compare another case, then copy or save the result you plan to use.
About this ramp slope calculator
The Ramp Slope Calculator lets you calculate ramp slope, angle, required run, and landing count from rise and ratio. The controls cover only the inputs needed for the result.
You can also use it to compare results after changing one input.
Example
A 24-inch rise at a 1:12 ratio requires 24 feet of run before accounting for landings.
Common uses
- → calculate ramp slope, angle, required run, and landing count from rise and ratio
- → compare results after changing one input
- → save an estimate for planning or comparison