Health & Fitness Calculators

Health numbers are most useful when you understand what they measure and what they leave out. These calculators estimate body mass index, basal metabolic rate, daily calorie needs, body fat percentage, ideal weight range, running pace and pregnancy due date using widely accepted formulas.

Each page explains how the result is calculated, how to read it and where it can mislead, and cites public health sources. The results are population-based estimates, not a diagnosis, so talk with a doctor or registered dietitian before making medical or major diet changes.