Quick Answer: Ramp Calculator (Australia)
For an accessible ramp under AS 1428.1, the maximum gradient is 1:14 (one unit rise per 14 units run). For a 500mm rise, that's a 7m ramp run with a landing required every 9m (760mm rise). Domestic non-accessible ramps can go up to 1:8 in private use.
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Australian Ramp Gradient Standards (AS 1428.1)
| Use Type | Max Gradient | Max Run Between Landings |
|---|---|---|
| Accessible ramp (AS 1428.1) | 1:14 (7.1%) | 9m (760mm rise) |
| Step ramp (small rise) | 1:10 (10%) | 1.9m (190mm rise) |
| Kerb ramp | 1:8 (12.5%) | 280mm rise max |
| Domestic / private (non-accessible) | 1:8 (12.5%) | No mandated landing |
| Driveway / vehicle | 1:5 (20%) | Per local council |
Ramp Width and Edge Protection
- Accessible ramps: Minimum 1000mm clear width (AS 1428.1), preferred 1200mm
- Wheelchair passing: 1800mm wide section every 25m
- Edge protection: Required if drop >190mm (kerb 65mm minimum)
- Handrails: Both sides required for accessible ramps over 190mm rise, 865-1000mm height
FAQs
What is the maximum gradient for a wheelchair ramp in Australia?
1:14 (about 4.1°) under AS 1428.1 for accessible ramps. Steeper gradients only allowed for short step ramps and kerb ramps with strict length limits.
How long does a ramp need to be for a 500mm rise?
For an accessible 1:14 ramp: 7m run plus a landing. For domestic 1:8: 4m run is the steep maximum.
Do I need a landing on my ramp?
Yes for accessible ramps with rise over 760mm — landings required at the top, bottom, and every 9m run. Landing must be 1200mm × 1200mm minimum.
What about a driveway ramp?
Driveway gradients are governed by local council, not AS 1428.1. Typical maximum is 1:5 (20%) at the property boundary, transitioning gradually. Vehicle suspension constraints often dictate gentler.
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