Resources

Health calculator guides

Short, practical explanations that help you choose a calculator and understand the number it produces.

BMI fundamentals

Understand the metric and imperial equations and adult screening categories.

Use category boundaries as screening ranges rather than diagnoses.

Learn why adult and pediatric interpretation are different.

See how BMI thresholds translate into a height-specific weight range.

Compare Devine, Robinson, Miller and Hamwi estimates.

Understand circumference-based estimation and measurement limitations.

Learn what resting energy expenditure means and how Mifflin-St Jeor works.

See how activity factors turn BMR into a daily expenditure estimate.

Understand maintenance estimates and why actual needs vary.