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Waist-to-hip ratio calculator

Compute your waist-to-hip ratio against the WHO cut-off, and your waist measurement against the WHO waist thresholds.

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Need Waist-to-hip ratio, Against the WHO ratio cut-off, Against the WHO waist thresholds? The Waist-to-hip ratio calculator derives it from Waist (cm), Hip (cm), Sex in one step. For instance, with Waist (cm) = 80, Hip (cm) = 100 and Sex = Male it returns Waist-to-hip ratio = 0.8, Against the WHO ratio cut-off = below and Against the WHO waist thresholds = normal.

How to use it

  1. Enter your values: Waist (cm), Hip (cm), Sex.
  2. Read the result instantly: Waist-to-hip ratio, Against the WHO ratio cut-off, Against the WHO waist thresholds.

Frequently asked questions

What does the Waist-to-hip ratio calculator actually compute?

It takes Waist (cm), Hip (cm) and Sex and derives Waist-to-hip ratio, Against the WHO ratio cut-off and Against the WHO waist thresholds from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

3 values: Waist (cm), Hip (cm) and Sex. Nothing else is required — no account, no file upload.

Can you show a worked example?

With Waist (cm) = 80, Hip (cm) = 100 and Sex = Male, the calculator returns Waist-to-hip ratio = 0.8, Against the WHO ratio cut-off = below and Against the WHO waist thresholds = normal. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

Which “Sex” option should I choose?

You can pick between « Male » and « Female ». Each one changes what the calculator works out, so switch and compare — the default is « Male ».

When would I actually use this?

Getting a reference point before a check-up, setting a realistic target, and understanding why two people of the same weight can be in very different shape — and, the same act from the other side, putting a day's caffeine, salt, sugar or alcohol beside the ceiling a health body publishes for it.

What is the most common mistake?

Reading BMI as a measure of health. It cannot tell muscle from fat, which is why athletes routinely score as overweight and why it says little about an individual.

How accurate is it, and what are the limits?

For general guidance only — not medical advice.

What is the difference between the Waist-to-hip ratio calculator and the Waist-to-height ratio calculator?

This one returns Waist-to-hip ratio and Against the WHO ratio cut-off; the Waist-to-height ratio calculator returns Waist-to-height ratio and Health category. That is the whole difference — open the one whose figure you need.

Where do the figures come from, and how current are they?

The formulas are the published ones (Quetelet for BMI, Mifflin-St Jeor or Harris-Benedict for energy expenditure) and the tool names which it used. None of this is a diagnosis or a substitute for a clinician.

Further reading

All guides →
ExplainerWaist-to-Hip Ratio Explained: The Thresholds, and Where to Put the TapeWHO puts abdominal obesity at a ratio of 0.90 or more for men and 0.85 or more for women. But measuring in the wrong place changes the answer more than the threshold does — here is exactly where the tape goes.ExplainerWhat Is a Healthy Waist-to-Height Ratio?Keeping your waist under half your height is a simple health marker. Learn what waist-to-height ratio means, how to measure, and why under 0.5 is the goal.ExplainerIs BMI Reliable? The Limitations of Body Mass IndexBMI is a quick screen, not a diagnosis. Learn what it misses — muscle, fat distribution, age — and what to check alongside it.ExplainerWhat Is Lean Body Mass? LBM vs Fat MassLean body mass is everything in your body that isn't fat. Learn how the Boer formula estimates it and why it matters for health and training.ExplainerWhat Is a Healthy BMI?BMI groups weight into ranges relative to height. Here's what counts as healthy, how to calculate it, and the limits of the number.ExplainerWhat Is Your Ideal Weight?There's no single ideal weight — it's a healthy range. Here's what the common formulas say, what they miss, and better ways to judge a healthy weight.