---
title: "Estimate your BMI and defended range — Dr. Chris Thompson | Everself"
url: https://everself.com/thompson/tools/defended-range/
description: "An educational estimate of the weight range your body defends, built from the weights you have actually sustained. It returns a range, never a single number, and it is not a measurement."
---

Metabolic Tools

# Estimate your BMI and defended range

There is no test that pinpoints a set point. Your own history is the nearest substitute: the weights you have held for a year or more are the strongest available clue to what your body defends now.

The short answer

Your body regulates weight around a defended range rather than a single numberC-III-12. This tool estimates where yours currently sits, using the weights you have actually sustained, and explains what that estimate means. It is an educational estimate, not a measurement.

Your estimated range will appear here.

For education only. Not medical advice, diagnosis, or treatment, and not a substitute for care from a qualified professional. There is no test that pinpoints a personal set pointC-III-12. If you're struggling with eating or body image, please talk to a healthcare provider or a support line.

## Where this sits in the science

The band this tool returns is a reading of your sustained weights, not a measured value. Its width comes from a rule of thumb used in obesity research for a defended range, and that choice has not been validated in a published studyC-III-12. [Why the weight you defend keeps rising](https://everself.com/thompson/science/drift) sets out the evidence the estimate rests on, including the parts that are weaker than the confident version.

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