Disclaimer

Not Medical, Physiotherapy, or Occupational-Health Advice

The Seat Height Calculator, Desk Height Calculator, Monitor Distance Calculator, Chair Weight Capacity Checker, Sit-Stand Calculator, and Posture Angle Checker produce educational estimates for setting up a desk, not a clinical assessment. They are not a substitute for advice from a doctor, physiotherapist, or certified ergonomist, and they don’t diagnose, treat, or rule out any condition. If you have persistent pain, a repetitive-strain injury, a pre-existing condition, or a disability that affects how you sit or work, get advice from a qualified professional who can actually examine your situation before changing your setup based on a number from this site.

How the Numbers Are Estimated

Each calculator applies a widely used anthropometric rule of thumb to whatever figures you enter — for example, seat height and desk height ratios based on standing or sitting stature, a 90-90-90 rule for the Posture Angle Checker, or a manufacturer’s typical weight-capacity margin for the Chair Weight Capacity Checker. These are population-level approximations, not measurements of your specific body, chair, or desk. Anthropometric formulas assume “typical” proportions; real bodies vary in torso-to-leg ratio, arm length, and comfort preference in ways a single formula can’t capture.

Where a Result Might Not Fit You

A calculator result is more likely to miss the mark if you have unusual proportions relative to your height, an existing injury or chronic pain condition, a chair or desk that doesn’t adjust across a normal range, or you’re pregnant or otherwise experiencing temporary changes that affect comfortable posture. In any of these cases, treat the tool’s output as a starting point to discuss with a professional, not a final answer.

Museum & Learn Content

Entries in the museum and learn sections are sourced from Wikipedia and Wikimedia Commons and presented largely as published there. ChairKey doesn’t independently fact-check every claim in that source material, and Wikipedia entries can be incomplete, outdated, or edited after we pull them. Treat these sections as a starting point for further reading, not a verified reference.

Blog & Guides

Articles on the blog reflect general knowledge about chairs, desks, and workspace setup at the time they were written. Products, standards, and prices change; always check current specifications before buying based on something you read here.

Third-Party Links & Ads

The site links to outside sites and displays third-party advertisements (including Google AdSense) and, on some pages, Amazon affiliate links (see the Affiliate Disclosure). We don’t vet, control, or endorse the content of external sites or the products advertised on them.

No Warranty, No Liability

Everything on ChairKey is provided “as is,” without warranty of accuracy or fitness for a particular purpose. To the extent permitted by law, ChairKey isn’t liable for any decision made, or outcome experienced, as a result of using a calculator, reading an article, or relying on museum or learn content.

Changes to This Disclaimer

This page may be revised as tools or content change; the date above reflects the latest revision.

Contact

Questions about this disclaimer, or a tool result that looks wrong: email support@chairkey.com or use the contact page.