GlenCalc

Wheelchair ramp calculator

The ADA Standards limit ramp slope to 1:12 (1 in of rise per 12 in of run) and each run to 30 in of rise, with a level landing between runs.

Your answer

Ramp length (sloped runs)24 ft
Runs1
Intermediate landings (60 in long)0
Angle4.76 °

Worked out in your browser. Nothing you type is sent to a server.

How we worked it out

Updated as you change the numbers.

  1. Length = rise × 12 = 24 in × 12 ÷ 12 ft.
  2. A new run starts at least every 30 in of rise, with a level landing.

Method and assumptions

2010 ADA Standards 405.2 set the maximum running slope at 1:12 and 405.6 limit each run to 30 in of rise; landings must be at least 60 in long. Residential ramps that aren’t covered by the ADA often follow the same rules for safety.

Questions

How long a ramp for 24 in of rise?

24 ft at 1:12, in one run.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

Embed this calculator on your site

Free to use. Paste this where you want the calculator; it runs in your visitors’ browsers, sets no cookies and sends nothing to us.

Related calculators