Office Chair Size Calculator
Enter your height and weight to get the seat height range, seat depth, seat width, and chair size class that fits your body.
| Height | Seat height | Seat depth | Size |
|---|---|---|---|
| 60 in | 15.0 in | 15.6 in | Small |
| 64 in | 16.0 in | 16.6 in | Standard |
| 68 in | 17.0 in | 17.7 in | Standard |
| 72 in | 18.0 in | 18.7 in | Large |
| 76 in | 19.0 in | 19.8 in | Large |
How to use your numbers
Start with the seat height range and set the chair so your feet rest flat and your thighs sit level. Then check the seat depth, leaving about a fist of space behind your knees. Finally, match the width and size class to the listing before you order.
Why fit beats features
A chair with every adjustment still hurts if the seat is too deep or the armrests sit too high. Your height sets the seat and back, and your weight guides the width and frame class. Get those three right before you pay for extra levers.
Getting the details right
Back height should reach your shoulder blades so your upper back has support. Heavier sitters usually want a wider seat and a sturdier cylinder. If you are between sizes, size up for width and use the seat height adjustment to dial in the rest.
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Questions about this calculator
How do I know what size office chair I need?
Use your height to set seat height and depth, then use your weight to guide seat width and frame class. Small, Standard, and Large labels vary by brand, so compare the actual measurements.
What is a good seat height for my height?
Seat height runs near 0.25 times your height, about 17.3 in (43.8 cm) at 69 inches. Your feet should rest flat and your knees should sit near a 90 degree angle.
How deep should an office chair seat be?
Seat depth is about 0.26 times your height, near 17.9 in (45.5 cm) at 69 inches. Leave roughly a fist of space between the seat edge and the back of your knees.
How wide should a chair seat be?
Most seats fall between 18 and 21 in wide. Heavier sitters usually want the wider end for support, while lighter sitters are fine near 18 to 19 in.
How tall should the chair back be?
Look for a back that reaches your shoulder blades, which is roughly 0.31 times your height. That supports your upper back without pushing your head forward.
What chair size fits a tall person?
People about 71 in and up usually need a Large frame with a taller cylinder and a deeper seat. Check the listed seat height range before you buy.
Do small and large chairs use different weight limits?
Yes. Larger chairs often carry higher weight ratings, and the cylinder and base are built for it. Always check the listed capacity along with the size.