Standard electric wheelchairs are rated to 110 to 120kg. If you need a chair for someone above this weight, a heavy-duty or bariatric model is the only safe option. These chairs are built differently — stronger frames, wider seats, more powerful motors — and using a standard chair beyond its weight rating is a genuine safety risk.
Here's what to look for and how to find the right chair in Australia.
Key takeaways
- Bariatric power chairs are typically rated from 160kg to 250kg — always match the chair rating to the user's weight
- Seat width for bariatric users is typically 50 to 60cm — check that armrests are reachable and not pressing on the hips
- NDIS funds bariatric equipment through Capital Supports — an OT assessment is required
In this article
- What makes a wheelchair "heavy-duty" or bariatric?
- Practical considerations for bariatric users
- NDIS funding for bariatric electric wheelchairs
What makes a wheelchair "heavy-duty" or bariatric?
It's not just a higher weight rating. Bariatric chairs are built differently throughout to handle the sustained demands of a heavier user — from the frame up.
Weight capacity and frame construction
Standard power chairs are rated to 110 to 120kg. Heavy-duty models come in ratings of 160kg, 180kg, and 200kg or more. Always leave a margin — a chair rated to exactly the user's weight will wear faster and sits closer to its structural limit.
Most bariatric chairs use reinforced steel frames rather than aluminium. Steel is heavier, but it handles sustained load and stress far better over time. Aluminium bariatric chairs exist, but they're less common at high weight ratings.
Seat width and depth
Standard power chair seats are 40 to 46cm wide. Bariatric seats typically run from 50 to 60cm. The right seat width leaves about 2.5cm clearance either side of the user's hips — enough room for comfort without placing the armrests too far away to use.
Seat depth, front to back, matters just as much. Proper depth supports the full length of the thigh without pressing behind the knees. A bariatric OT assessment will measure both as part of the seating evaluation.
Motor power and battery range
A heavier load needs more motor torque, especially on inclines and uneven ground. Bariatric power chairs use higher-torque dual motors. The trade-off is faster battery drain under heavy use and on slopes. Look for chairs with extended battery options or higher-capacity packs to maintain real-world range.
Practical considerations for bariatric users
Choosing the right model is only part of the picture. Bariatric chairs bring specific practical challenges at home and on the road.
Doorway and turning space requirements
A 50cm seat means the chair itself is typically 68 to 75cm wide — noticeably wider than a standard power chair. Many standard Australian doorways (810mm) won't give adequate clearance. Aim for 900mm or more of clear doorway width for a safe, comfortable passage.
Turning radius is wider in bariatric models too. Check the chair's specification against the space available at home, particularly in bathrooms and smaller rooms, before you order.
Transport and vehicle access
Bariatric power chairs are heavier (often 100 to 150kg) and wider. Vehicle ramps must be rated above the chair's weight and wide enough for the broader wheelbase. Standard rear-platform hoists may not have sufficient width — check specifications carefully before assuming a standard setup will work.
For users who travel regularly in their chair, a wheelchair-accessible vehicle (WAV) with a wider internal ramp and stronger tie-down points is often the only practical solution.
NDIS funding for bariatric electric wheelchairs
Bariatric electric wheelchairs are funded through the NDIS Capital Supports budget as complex assistive technology. An occupational therapist assessment is required. Your OT will specify the appropriate weight rating, seat dimensions, and chair configuration based on your functional needs and body measurements.
The process follows the same path as standard power wheelchair funding: include AT in your plan, complete an OT assessment, get quotes from a registered provider, and submit for NDIS approval. Given the higher cost of bariatric chairs (typically $4,500 to $10,000 and above), the NDIS funding pathway is well worth pursuing.
Our team can advise on which bariatric models we stock and what specifications to discuss with your OT. View our bariatric wheelchair range or browse our full electric wheelchair selection and give us a call to discuss your specific requirements.