ADA ramp calculator example

Accurate ADA ramp calculator: compute slope, run, landings, and handrail/guard triggers to ADA 2010 & IBC 2021 -- share scenarios and download PDFs.

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Result summary

Total rise
18 in
Required horizontal length
336 in
Slope ratio
1:12
Segments
1
Landings
2
Clear width
36 in
Handrails
Required
Guards
Not required
Cross slope
2% max

Ramp segments

#Rise (in)Run (in)Slope %Slope ratio
1182168.331:12

Landings

#TypeLength (in)Width (in)
1bottom6036
2top6036

Checklist

General notes

  • GENERAL NOTES (ADA 2010 & IBC 2021)
  • 1. Overall rise 18 in; ramp segmented to maintain max slope 1:12 (<=8.33%). Cross slope limited to 2%.
  • 2. Each ramp run limited to 30 in rise. Segment 1: rise 18 in, run 216 in (slope 8.33% ~ 1:12).
  • 3. Landings provided at top, bottom, and transitions. Minimum landing length 60 in, width equals clear ramp width 36 in. Turning landings sized 60 in x 60 in minimum.
  • 4. Maintain clear width between handrails of at least 36 in. Edge protection (2 in curb or equivalent) required where adjacent drop exceeds 4 in.
  • 5. Handrails required where rise exceeds 6 in or horizontal run exceeds 72 in. Provide both sides, height 34-38 in, extend 12 in beyond top and bottom run, return to guard/wall. Handrail profile selected: round. Maintain 1.5 in min clearance from adjacent surfaces.
  • 6. Guards required where drop-off exceeds 30 in (IBC 2021). Guard height 42 in minimum, limit openings per IBC Section 1015.
  • 7. Surface to be stable, firm, and slip-resistant. Exterior ramps to provide drainage. Maintain maximum cross slope 2%.

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