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U.S. ADA Ramp Calculator

inches
feet of ramp
feet of ramp
feet of ramp
NOTE: Please use this scooter & wheelchair ramp calculator ONLY AS A GUIDE for determining the ramp length you need to load your wheelchair or scooter.

Ramp Slope and Rise

The lower the slope the safer and easier the use of the ramp. That said, the general rule of thumb is 1" of rise will require 12" of ramp. While it sounds like an awfully low slope, it is really quite difficult for most wheelchair users to negotiate even a 1 in 12 slope if the ramp is any length at all. Permanent ramps are subject to local building codes whether being constructed in a residential or commercial application. With pathway, portable and van ramps there usually are no rules or regulations, which dictate length or slope however common sense must dictate that a ramp which is too steep cannot be ascended safely.