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Free ADA ramp calculator and wheelchair ramp slope calculator. Get ramp length (1:12), slope %, angle, landings, handrails, and cost. Pair with doorway width at the entry.
Last updated: May 24, 2026
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Vertical distance the ramp needs to overcome (step height, threshold, etc.)
Required Ramp Length
96.0"
Compliance Level:
ADA Compliant
✓ ADA Compliant
Slope
8.3%
Angle
4.8°
Landing Size (minimum)
60.0" × 60.0"
Handrails: Required
Both sides, 34-38" height, proper grip diameter
Material Estimates:
Estimated Construction Cost:
Recommendations:
ADA Compliance Tips:
Answers: how long does my ramp need to be and what slope is ADA compliant.
Minimum run from rise and ratio — 8 in rise → 96 in at 1:12.
8.33% and ~4.76° for ADA standard — steeper modes for limited use only.
Landing size, handrail flag, materials, and $/ft construction range.
Default: 8 in rise, ADA standard → 96 in (8 ft) run · slope 8.33% (1:12) · angle 4.76° · ADA Compliant · handrails Yes · est. $600–$1,200.
Ramp Length
96 in (8 ft)
Slope / Angle
8.33% · 4.76°
ADA Compliant
Yes
| Ratio | Grade | Angle | Typical use |
|---|---|---|---|
| 1:12 | 8.33% | 4.76° | ADA standard — permanent wheelchair ramps |
| 1:10 | 10% | 5.71° | Limited — rises ≤6 in (this calculator steeper mode) |
| 1:8 | 12.5% | 7.13° | Limited — rises ≤3 in or residential (non-ADA) |
| 1:6 | 16.67% | 9.46° | Industrial equipment only — not for public wheelchair access |
| Rise | ADA 1:12 length | Notes |
|---|---|---|
| 3 in | 36 in (3 ft) | 24 in (2 ft) |
| 6 in | 72 in (6 ft) | 60 in (5 ft) at 1:10 |
| 8 in (default) | 96 in (8 ft) | Typical single step — calculator default |
| 12 in | 144 in (12 ft) | One foot rise — common porch |
| 30 in | 360 in (30 ft) | Maximum rise per run — landing required before next run |
| Element | Requirement | Notes |
|---|---|---|
| Max slope | 1:12 (8.33%) | Permanent accessible routes |
| Max rise per run | 30 in | Intermediate landing if higher |
| Clear width | 36 in min | Between handrails |
| Landings | 60 in × 60 in min | Top, bottom, direction changes |
| Handrails | Both sides if rise >6 in | 34–38 in above ramp surface |
Planning estimates aligned with ADA 2010 Chapter 4 ramps — confirm with licensed design for permitted work.
rampLength (in) = rise (in) × 12 for 1:12slope % = (rise ÷ run) × 100angle ° = arctan(rise ÷ run)landing (in) = max(60, 0.10 × ramp run)cost ≈ (run ft) × $75 basic · × $150 premium96 in (8 ft) · 8.33% · 4.76° · landing 60 in sq · $600–$1200.
144 in (12 ft) · 8.33% · handrails · $900–$1800.
64 in run · 12.5% · 7.13° · ADA compliant: No — use ADA standard for public access.
24 in · 1:8 · handrails no · Limited Use.
60 in (5 ft) · 10% · Commercial Grade — still not ADA compliant in model (slope > 1:12).
360 in (30 ft) · $2250 basic · intermediate landing required before any additional rise.
Run 240.0 cm · 8.33% · 4.76° · ADA compliant.
Share with contractors, facility managers, and homeowners planning ADA-compliant wheelchair ramps.
Suggested hashtags: #ADA #WheelchairRamp #Accessibility #UniversalDesign #RampSlope