Comfortably above your own weight, not just equal to it. Sitting down heavily, rocking and leaning back put more force through the base, cylinder and mechanism than your weight alone, so a margin — a fifth or more is a common rule of thumb — leaves room for that. Where a listing gives two figures, go by the lower one; where it gives none, ask.
What the figure means. It is the maximum user weight the maker rates the chair for. It is not a point where the chair breaks, but the closer you sit to it every day, the harder the cylinder, the base and the tilt mechanism work, and the sooner they wear — how long gas cylinders last explains why.
What our chairs state. In our ergonomic office chairs hub:
- CAPOT: 159 kg (350 lb) in the description, though the listing title says 180 kg — use 159 kg.
- Marsail: 150 kg (330 lb).
- ELITESEATS: 150 kg (330 lb), but only in the listing title.
- Yaheetech: no capacity published.
Read the claim, not just the number. A capacity stated in the specifications is more reliable than one in a listing title alone, and one backed by a named test — the CAPOT states BIFMA X5.1 certification — more than either. What BIFMA certification tests explains what that covers. A long warranty is another sign the maker stands behind the figure.
It is not only the seat. A chair is as strong as its weakest part: base, cylinder, casters and mechanism. When you replace parts, check their ratings too. Five casters share the load, so a set’s figure should comfortably exceed the chair’s — in our chair casters and parts hub, the Topdeep kit states 350 lb (159 kg) in total, and the Pztayoe 300 lb per wheel. Some sets, like the Omyoffice’s 1,000 lb, do not say whether the figure is per wheel or per set.
Other sizing to check. A heavier or taller person also needs a seat wide and deep enough and a seat height range that suits — setting up a new office chair covers the fit.
Last reviewed 13 October 2026