Editorial policy

Where our formulas come from

Every calculator uses a formula or cut-off published in peer-reviewed research or by a recognised health body, such as the World Health Organization, ICMR – National Institute of Nutrition, American Heart Association, American Diabetes Association, American College of Obstetricians and Gynecologists and the Institute of Medicine. We list the sources at the bottom of each calculator.

Indian context

Where guidance for Indians differs from international guidance, such as BMI and waist-size cut-offs, we show the Indian or Asian values and explain the difference.

Testing

We check each calculator against worked examples from the original formulas before publishing, and again whenever we change it.

Updates and corrections

We review pages when guidelines change. If you spot an error, email us and we will check and correct it quickly. Each page shows the date it was last updated.

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No medical advice

Our content is for general information. It is not a diagnosis or treatment plan.