Guide library
Health Guide Library
This small library consolidates related questions into substantial guides with worked examples, original diagrams, and direct links to the calculations they explain.
Calories & macros
Calories, macros & weight trends
How Many Calories Should I Eat? Build and Test an Estimate
Build a calorie estimate from BMR and activity, see a worked example, choose a goal adjustment, understand macros, and test the result against a real trend.
Read guide Calories & macrosHow to Choose an Activity Level for a Calorie Calculator
Use a seven-day audit of work, steps, training, and recovery to choose an activity factor and test adjacent estimates without overstating exercise.
Read guideBody composition
Body measurements
Body-Fat Percentage Estimates: Methods, Measurements, and Error
Understand what body-fat percentage means, where to place a tape, how circumference equations work, and why methods can disagree.
Read guide Body compositionWaist-to-Height Ratio: Formula, Measurement, and Context
Calculate waist-to-height ratio, follow a repeatable waist protocol, interpret the 0.5 screening boundary, and compare it with BMI and body-fat estimates.
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