About Keep Your Body

Keep Your Body is a free collection of health calculators run by an independent publisher. Our aim is to give clear, accurate numbers for everyday health questions, together with plain explanations of what they mean and where they come from.

How we build our tools

• We use formulas and thresholds published by recognised bodies and peer-reviewed research, such as the World Health Organization, the US Centers for Disease Control and Prevention, the UK National Health Service, the European Food Safety Authority and the American College of Obstetricians and Gynecologists.
• Every page lists its sources and the date it was last reviewed.
• We test each calculator against worked examples before publishing.

What we are not

We are not a medical service and do not give personal medical advice. Our tools cannot take your full health history into account. Please read our medical disclaimer and talk to a qualified professional about decisions affecting your health.

How the site is funded

Keep Your Body is free and supported by advertising. Advertisers have no influence on our calculators or content, and we do not accept ads for unproven treatments where we can control it.

Found a mistake? Tell us; we correct errors quickly.