Ramp Calculator
Angle and slope.
Enter the values and press Calculate.
How to use Ramp Calculator
The angle comes from the arctangent of rise over run; slope is the same ratio as a percent.
Open Ramp Calculator on toolpermarket and enter your values above.
Enter the ramp rise and the ramp run in the fields above, then press Calculate.
Read the result below the form. You can change any input and press Calculate again to compare scenarios.
Worked example. A 1 meter rise over 12 meters of run is about a 4.76 degree incline.
When to use Ramp Calculator. Use it to check ramps meet accessibility guidelines.
When you actually reach for this
- Use it to check ramps meet accessibility guidelines.
Where this tool stops being accurate
- Treats areas as perfect rectangles and excludes doors, windows, and waste.
- In practice buy 5-10 percent extra to cover cuts, mistakes, and pattern matching.
Frequently asked questions
What slope is accessible?
Many guidelines target about a 1 in 12 slope, or roughly 8 percent.
Is a longer run better?
Yes. A longer run lowers the angle and makes the ramp easier to use.
Should I order exactly this amount?
No. The tool gives the raw area or count; add 5-10 percent for offcuts and breakage, and subtract fixed openings like doors where relevant.