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The total vertical height the ramp must climb.
Measure the full vertical distance from the lower landing to the upper landing that the ramp needs to overcome.
Total ramp horizontal length
53 ft
This restates the fixed ADA 2010 Standards ramp geometry requirements (1:12 max slope, 30 in / 762 mm max rise per run, 60 in / 1,524 mm min landing length) for total horizontal length planning — it does not check ramp width, cross slope (max 1:48), edge protection, surface requirements, or handrail specifications (see the companion handrail extension calculator), all of which are separately required for full compliance.
- Number of ramp runs
- 2 runs
- Intermediate landings required
- 1 landing
They open the calculator with your figures already in it
Commercial ADA Accessible Ramp Length & Landing Calculator: 53 ft — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Per the ADA 2010 Standards for Accessible Design (verified against regulatory text/mirrors this session): maximum running slope is 1:12 (Section 405.2); maximum rise for a single ramp run before a landing is required is 30 inches / 0.762m (Section 405.6); ramp handrails must extend 12 inches / 0.3048m minimum beyond the top and bottom of each run (Section 505.10.3, verified verbatim: 'Ramp handrails shall extend horizontally above the landing for 12 inches (305 mm) minimum beyond the top and bottom of ramp runs'). Minimum landing length, verified verbatim against the Department of Justice's published text on 2026-09-22: 'The landing clear length shall be 60 inches (1525 mm) long minimum' (Section 405.7.3).
Inputs used
- Total Vertical Rise
- 4 ft
Intermediate steps
- Number of ramp runs
- 2 runs
- Intermediate landings required
- 1 landing
Confidence note: This restates the fixed ADA 2010 Standards ramp geometry requirements (1:12 max slope, 30 in / 762 mm max rise per run, 60 in / 1,524 mm min landing length) for total horizontal length planning — it does not check ramp width, cross slope (max 1:48), edge protection, surface requirements, or handrail specifications (see the companion handrail extension calculator), all of which are separately required for full compliance.
What this calculation does not cover
- The landings at the two ENDS are not in this number. A ramp needs a level landing at its top and at its bottom, each at least 60 inches (1,524 mm) in the direction of travel, and neither is in the total returned here — so a ramp that fits the measured space on this figure will overrun it by roughly 10 feet (3 m) once both ends exist. Intermediate landings are counted; the terminal ones are not.
- 1:12 is the code ceiling, not a design target, and this page is hardcoded to it. Built at exactly 1:12 a ramp has no construction tolerance at all — a slab poured a fraction of an inch steep anywhere along the run measures non-compliant — and it is also the hardest legal slope for someone to self-propel up. Designing shallower means multiplying the rise by 16 or 20 yourself, because this total will always be the shortest ramp the standard permits, never the most usable one.
- A landing that turns is a bigger landing. This adds 60 inches of straight travel per intermediate landing, which is right only where the ramp carries on in the same direction. Switch back — which is how a long ramp fits a real site — and that landing must be at least 60 by 60 inches with the ramp width setting the other side, at which point the answer stops being a length and becomes a footprint to lay out on plan. The same goes for any landing a door opens onto, where the door's maneuvering clearance is required on top of the 60 inches.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-22 · v1.0.1
Regulatory standards & verification citations1
- Per the ADA 2010 Standards for Accessible Design (verified against regulatory text/mirrors this session): maximum running slope is 1:12 (Section 405.2); maximum rise for a single ramp run before a landing is required is 30 inches / 0.762m (Section 405.6); ramp handrails must extend 12 inches / 0.3048m minimum beyond the top and bottom of each run (Section 505.10.3, verified verbatim: 'Ramp handrails shall extend horizontally above the landing for 12 inches (305 mm) minimum beyond the top and bottom of ramp runs'). Minimum landing length, verified verbatim against the Department of Justice's published text on 2026-09-22: 'The landing clear length shall be 60 inches (1525 mm) long minimum' (Section 405.7.3).
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Code thresholds this tool can check
Code thresholds this tool can check
Checked for United States. Each check below names the body that published the limit it uses. Switching market re-runs them. This is not a code review and has no official standing.
These checks cover only the specific numeric limits listed below. They are not a complete code review: fire separation, egress, structural capacity and accessibility provisions are outside their scope, and only the handful of local amendments offered in the selector are modelled — your municipality may have others. Passing every check here does not make a design compliant. Final approval rests with your local building authority.
WITHIN LIMIT — Maximum running slope 1:12; maximum rise 30 in (762 mm) per run.
Rise of 48 in exceeds 30 in, so 1 intermediate landing(s) are mandatory — they are included in the length above.
US Access Board · 2010 ADA Standards §405.2 / §405.6 · 2010 ADA Standards §405.6