Waist-to-Height Ratio Calculator
A quick check of belly fat and heart risk — keep your waist under half your height.
Result
How to use
- 1
Measure your waist with a soft tape at belly-button level, after breathing out normally.
- 2
Enter your waist and height in cm.
- 3
See your ratio and where it falls on the risk scale.
Questions
What is a healthy waist-to-height ratio?
Keep your waist to less than half your height — a ratio below 0.5. From 0.5 to 0.6 means increased health risk, and 0.6 or more means high risk (NICE guidance, 2022).
Why is this better than BMI for Indians?
Many Indians carry more fat around the belly even at a normal BMI (the 'thin-fat' body type). Waist measurements catch this central fat, which is linked to diabetes and heart disease.
Does it work for everyone?
The NICE cut-offs are for adults. They are not meant for pregnancy, and very muscular people or those with a BMI of 35 or more should talk to a doctor about their risk.
About this Waist-to-Height tool
Waist-to-Height Ratio Calculator — A quick check of belly fat and heart risk — keep your waist under half your height. It is one of 200 free tools on namasivayam.in, made by software engineer Namasivayam Vadivelan for everyday use in India.
Everything is calculated instantly in your browser: nothing you type or upload is sent to any server, there is no sign-up, and it works on mobile and desktop. Measure your waist with a soft tape at belly-button level, after breathing out normally.
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Results are estimates to help you plan. They are not financial, tax or medical advice.