Wheelchair Seating Calculator

Calculate wheelchair seat dimensions including width, depth, height, backrest, armrest, and cushion type based on body measurements.

Inputs

Hip Width (cm)

Thigh Length (cm)

Lower Leg Length (cm)

Trunk Height (cm)

Body Weight (kg)

Tab to move between fields

Results

Seat Width

43 cm

≈ 5 credit cards

Seat Depth41 cm

Seat Height47 cm

Backrest Height36.9 cm

Armrest Height24.8 cm

Cushion Type2

How to Use This Calculator

Measure the user's hip width (widest point) in cm while seated.
Measure thigh length (greater trochanter to popliteal fossa) in cm.
Measure lower leg length (popliteal fossa to heel) in cm.
Enter trunk height for back support sizing.
Review the recommended seat width, depth, and back height — confirm with a certified ATP.

How the result changes with Hip Width (cm)

Hip Width (cm)	Seat Width
26	29 cm
41	44 cm
59	62 cm
74	77 cm

What each input means

Hip Width (cm): Widest point across the hips when seated.
Thigh Length (cm): From back of buttocks to back of knee when seated.
Lower Leg Length (cm): From back of knee to sole of foot when seated.
Trunk Height (cm): From seat surface to top of shoulder.
Body Weight (kg): Patient body weight for cushion type recommendation.

What each result means

Cushion Type: 1 = foam, 2 = gel, 3 = air, 4 = hybrid.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Hip Width (cm) = 40, Thigh Length (cm) = 45, Lower Leg Length (cm) = 42, Trunk Height (cm) = 55 = 5 input(s) provided
Calculate Seat Width
Seat Width
43 = 43
Calculate Seat Depth
Seat Depth
41 = 41
Calculate Seat Height
Seat Height
47 = 47

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