Planning guides
Wheelchair dimensions: standard width, small wheelchair and wide sizes
Standard wheelchair dimensions and width, plus small, narrow and extra-wide wheelchair sizes, a size chart in mm and inches, doorway clearances and spec tips.
Wheelchair dimensions start with seat width: a standard adult wheelchair has an 18 in (460 mm) seat and is about 24 to 27 in (610 to 690 mm) wide overall when open. A small wheelchair or narrow wheelchair uses a 14 to 16 in seat and can be under 24 in wide, while wide and bariatric chairs use 20 to 30 in seats. Length with footrests is typically 42 to 48 in.
Standard wheelchair dimensions
Most adult manual wheelchairs share a common set of measurements, which is why procurement teams and architects can plan around a "standard" chair. The values below are typical market ranges for a cross-frame folding chair with 24 in rear wheels.
| Measurement | Typical standard value | Metric |
|---|---|---|
| Seat width | 18 in | 460 mm |
| Seat depth | 16–18 in | 410–460 mm |
| Seat-to-floor height | 19–20 in | 480–510 mm |
| Back height (from seat) | 16–17 in | 410–430 mm |
| Armrest height (from seat) | 9–10 in | 230–250 mm |
| Overall width, open | 24–27 in | 610–690 mm |
| Overall width, folded | 11–13 in | 280–330 mm |
| Overall length with footrests | 42–48 in | 1,070–1,220 mm |
| Overall height | 36–38 in | 910–970 mm |
| Rear wheel diameter | 24 in | about 600 mm |
| Front castor diameter | 6–8 in | 150–200 mm |
Treat these as planning figures. The model's own data sheet, measured to ISO 7176-5, is what counts for a contract.
How wide is a standard wheelchair?
A standard wheelchair is about 24 to 27 in (610 to 690 mm) wide, measured at its widest point. That point is usually across the handrims of the rear wheels, not the seat.
A quick rule is overall width = seat width + 6 to 9 in (150 to 230 mm). The exact addition depends on:
- Handrims and wheel spacing: wheels set close to the frame make a narrower chair
- Camber: angled rear wheels improve stability but add width at the floor
- Armrest style: full-length and desk-length arms on the outside of the frame add width
- Side guards or clothing guards
So a regular wheelchair width of 25 in for an 18 in seat is normal, and a 16 in seat chair will typically be about 22 to 24 in wide.
Wheelchair sizes: standard size chart
Wheelchair sizes are named by seat width. The chart below shows typical overall widths for each seat size, which is the number that matters for doorways and lifts.
| Size category | Seat width | Typical overall open width | Typical users |
|---|---|---|---|
| Pediatric | 10–14 in (250–360 mm) | 18–22 in (460–560 mm) | Children, small teens |
| Narrow / small adult | 14–16 in (360–410 mm) | 21–24 in (530–610 mm) | Petite adults, tight homes |
| Standard adult | 18 in (460 mm) | 24–27 in (610–690 mm) | Most adults |
| Wide | 20 in (510 mm) | 26–29 in (660–740 mm) | Larger adults |
| Bariatric / extra wide | 22–30 in (560–760 mm) | 29–38 in (740–970 mm) | Bariatric users |
Seat depth usually scales with width: about 16 in for narrow chairs, 16 to 18 in for standard chairs and 18 to 20 in for wide chairs. Seat-to-floor height is often offered as standard (about 19.5 in) or "hemi" height (about 17.5 in, 445 mm), the lower version letting users propel with their feet.
Narrow and small wheelchairs for tight spaces
A narrow wheelchair or small wheelchair is the practical answer when older homes, bathrooms or care rooms have doors below 30 in. These chairs typically use a 14 or 16 in seat and close-set wheels.
Points to weigh:
- Fit the user first. A seat that is too narrow causes pressure on the hips and thighs. Narrow chairs suit narrow users, not every user.
- Measure the clear opening, not the door leaf. Hinges, stops and an open door reduce usable width by 1.5 to 3 in.
- Consider a transport chair for short attendant-pushed trips. With small rear wheels and no handrims, it is often narrower than a self-propelled chair of the same seat width. See transport chair vs wheelchair.
- Look at turning space, not just width. A narrow wheelchair for a bathroom still needs room to approach the toilet or basin.
Small and compact electric wheelchairs
A small electric wheelchair for indoors is usually a folding or compact model with small drive wheels and a short wheelbase. Compact electric wheelchairs are often about 22 to 25 in (560 to 635 mm) wide and 35 to 40 in (890 to 1,020 mm) long, which makes them easier to turn in a home than a full-size power chair. Keling's KL-LY005 Electric Wheelchair foldable electric wheelchair measures 990 × 600 × 910 mm, with 7 in front and 12 in rear wheels. For more on choosing one, see our electric wheelchair guide.
Wide and extra wide wheelchairs
A wide wheelchair starts at a 20 in (510 mm) seat; bariatric chairs go up to about 30 in (760 mm). They have reinforced frames, often double cross-braces, and higher load ratings than standard chairs.
When ordering wide seat wheelchairs:
- Check every doorway, lift and corridor on the route. A 24 in wide seat wheelchair may be 31 to 33 in wide overall.
- Confirm the load rating on the test report, not the brochure.
- Check folded width and weight for transport; heavy-duty chairs can weigh 50 lb (23 kg) or more.
- Use matching bariatric beds, commodes and lifts across the pathway.
Doorways, turning space and building planning
Building codes set the space a wheelchair needs, and they are based on chair dimensions. The 2010 ADA Standards for Accessible Design, used in the United States and often referenced elsewhere, are a useful baseline.
| Requirement (2010 ADA Standards) | Imperial | Metric |
|---|---|---|
| Minimum clear door opening | 32 in | 815 mm |
| Minimum accessible route width | 36 in | 915 mm |
| Clear floor space for one wheelchair | 30 × 48 in | 760 × 1,220 mm |
| Turning space (circle) | 60 in diameter | 1,525 mm diameter |
Local codes differ, so follow the rules for your country. For hospitals, also plan for bed and stretcher movement, which usually drives corridor and door widths beyond wheelchair needs; see hospital bed dimensions.
In existing homes, a narrow wheelchair for narrow doorways can pass openings of roughly 24 to 28 in, but only if the user can approach straight on. A 90° turn into a narrow door from a narrow hallway is the most common failure point.
Wheelchair measurements: how to size a user
Correct wheelchair measurements come from the person, not the room. A seating professional should confirm sizes, but the basic method is:
- Seat width: measure hip width while seated, add about 1 in (25 mm).
- Seat depth: measure from the back of the buttocks to the back of the knee, subtract about 2 in (50 mm).
- Seat height: measure from the back of the knee to the heel with shoes on, add footrest clearance of about 2 in (50 mm) above the floor.
- Back height: measure from the seat to the lower edge of the shoulder blade for typical support.
- Armrest height: measure from the seat to the underside of the bent elbow, add about 1 in.
Remember that the cushion changes seat height and effective depth, so measure with the intended cushion in mind.
How ISO 7176 measures wheelchairs
ISO 7176 is the international series of wheelchair standards. ISO 7176-5 sets how overall dimensions, mass and maneuvering space are measured, and ISO 7176-7 covers seating and wheel dimensions. Asking for dimensions "measured according to ISO 7176-5" lets you compare spec sheets from different manufacturers on the same basis.
Other parts of the series cover stability, brakes and strength. Ask the supplier which parts the model has been tested to, and request the reports for that model and your destination market.
Specifying wheelchair sizes in a tender
Tenders often say "standard wheelchair" and then receive chairs that differ by several inches. A short table of required dimensions avoids this.
- Seat width and depth, with tolerance (for example ±10 mm)
- Seat-to-floor height, standard or hemi
- Overall open and folded width, overall length with and without footrests
- Rear wheel and castor diameter, tire type
- Mass without footrests, and maximum user mass
- Armrest and footrest type (fixed, flip-up, swing-away, elevating)
- Mix of sizes per order (for example 70% standard, 20% narrow, 10% wide)
Keling's manual range gives an idea of how catalog data is stated. The KL-LY001 Manual Wheelchair standard manual wheelchair lists external dimensions of 940 × 200–580 × 880 mm with a 460 × 400 mm seat size. The KL-LY003 Manual Wheelchair steel-frame manual wheelchair lists 1003 × 270–680 × 850 mm with a 100 kg load capacity. For children, the KL-LY007 Pediatric Cerebral Palsy Wheelchair pediatric cerebral palsy wheelchair uses a 370 × 370 mm seat cushion. Ask for the full data sheet for the model you shortlist.
For a broader view of chair categories, read types of wheelchairs and how to choose.
Next steps
Measure the users first, then the doors, lifts and turning spaces, and write seat sizes and overall widths into the specification. You can browse Keling's rehabilitation products or request a quote with the size mix and quantities you need.
Frequently asked questions
How wide is a standard wheelchair?
A standard adult wheelchair with an 18 in (460 mm) seat is usually about 24 to 27 in (610 to 690 mm) wide when open, measured across the rear wheels or handrims. Folded, most cross-frame chairs are about 11 to 13 in (280 to 330 mm) wide, depending on the cushion, armrests and wheel camber.
What are standard wheelchair dimensions?
A typical standard adult manual wheelchair has an 18 in (460 mm) seat width, a 16 to 18 in (410 to 460 mm) seat depth, a seat-to-floor height of about 19 to 20 in (480 to 510 mm), 24 in rear wheels and an overall length of roughly 42 to 48 in (1,070 to 1,220 mm) with footrests fitted.
What is the narrowest wheelchair?
The narrowest adult manual wheelchairs use 14 in (360 mm) seats and can be around 22 in (560 mm) wide overall; some transport chairs and narrow-adapter designs go narrower. Pediatric chairs are narrower still. A narrow seat must still fit the user's hips, so measure the person first, then the doorway.
What is a small wheelchair for adults?
A small wheelchair for adults usually means a chair with a 14 to 16 in (360 to 410 mm) seat, a compact frame and sometimes smaller rear wheels, chosen for petite users or tight homes. Compact electric wheelchairs and transport chairs are also called small wheelchairs because their overall footprint is shorter and narrower.
How wide does a door need to be for a wheelchair?
For new accessible buildings, the 2010 ADA Standards require a clear door opening of at least 32 in (815 mm) and a 36 in (915 mm) accessible route. In existing homes, a narrow wheelchair can pass doors of about 24 to 28 in (610 to 710 mm), but there must be space to approach and turn.
What size is an extra wide wheelchair?
Extra wide or bariatric wheelchairs typically have seats of 20, 22, 24, 26, 28 or 30 in (510 to 760 mm), with overall widths roughly 6 to 9 in (150 to 230 mm) more. A 24 in wide seat wheelchair will usually be more than 30 in (760 mm) wide overall, so it may not fit standard residential doors.
How do you measure a person for wheelchair size?
Measure hip width while seated and add about 1 in (25 mm) for seat width, measure from the back of the buttocks to the back of the knee and subtract about 2 in (50 mm) for seat depth, and measure lower-leg length with shoes on for seat height and footrest length. A therapist should confirm the final fit.
