Healthy Living
Practical, careful guides to body measures and daily energy. Explore the BMI and Energy & Metabolism collections.
What Is BMI and What Does It Actually Tell You?
Understand the calculation, adult categories, and limits of this familiar screening measure. Learn what this screening number can, and cannot, tell you.
Understand the number in context
What is being measured?
Learn the formula, the role of BMI as a screen, and what the number leaves out.
Read the adult ranges
See the CDC categories and interpret them without turning a range into a diagnosis.
Look beyond BMI
Compare weight-for-height with estimates of body fat, and learn why each measure has limits.
Understand energy from rest to a full day
Learn what resting and daily estimates describe, how the calculators connect, and why a number is not an eating target.
BMR vs. TDEE: What's the Difference?
A side-by-side guide to resting and total energy use, with an example and careful calculator links.
Start with the baseline
What BMR means, what our resting equation predicts, and what it cannot measure.
See the full day
Rest, digestion, and movement contribute to total expenditure. Explore an estimate with context.