Wheelchair Ramp Calculator

How long should a wheelchair ramp be?

in
in

Plan on

40 ft 0 inoverall

Uses the ADA Standards: 1:12 maximum slope, 30 in maximum rise per run, 60 in landings and 36 in clear width. Homes may follow other rules, so confirm with local code or a licensed professional.

1 run at 1:12, 2 landingsOrange = 60 in landing. Height exaggerated.
Sloped length30 ft 0 in
Runs1
Landings2 at 60 in
Width36 in
HandrailsBoth sides (rise over 6 in)

Plan a wheelchair ramp with 1:12 runs, landings and handrails from the total rise.

How it works

Rise in inches × 12 gives sloped length. Every 30 inches of rise adds a run, and each run needs a 60 inch landing at each end.

Before you order

  • Measure rise from the actual ground, since a low spot changes the total.
  • Keep a level landing at the door where someone can stop and open it.
  • Handrails usually apply above 6 inches of rise.

Common questions

How long is a ramp for 30 inches of rise?

30 feet of sloped length plus two 60 inch landings.

Do homes have to follow ADA rules?

Private homes often do not, but the ADA numbers are a sound target. Confirm with your local building department.