ADA Ramp Slope Calculator

Estimate the minimum ADA ramp length and required landings from the total vertical rise at the one to twelve maximum slope. Planning estimate only

Frequently Asked Questions

What is the maximum ADA ramp slope?

The maximum running slope for an accessible ramp is one to twelve, meaning one inch of rise for every twelve inches of run. A gentler slope is always allowed and is easier to use.

When is a landing required?

A level landing is required after a maximum rise of thirty inches in a single ramp run. Landings let users rest and allow safe changes of direction.

Is this calculator a substitute for the ADA Standards?

No. It is a planning estimate only. Always verify your design against the current ADA Standards for Accessible Design and your local building code.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.