Heart-Rate Training Zones — Max heart rate and the five training zones (recovery to VO2max) from age; uses the Karvonen reserve method when a resting heart rate is given.
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Body Mass Index (BMI) — BMI from weight and height, the WHO weight category, and the healthy-weight range for your height. Metric (kg/cm) or imperial (lb/in).
Body-Fat Percentage (U.S. Navy) — Body-fat % via the U.S. Navy circumference method (height/neck/waist, plus hip for women), the ACE category, and fat/lean mass
Calories Burned (MET) — Calories burned for an activity from its MET value, body weight and duration, plus a comparison table of common activities at the same w
Ideal Body Weight — Ideal body weight for a height by the four standard clinical formulas (Devine, Robinson, Miller, Hamwi) plus their average, in kilograms.
One-Rep Max (1RM) Estimator — Estimate one-rep max from a weight x reps set (Epley + Brzycki) plus a percentage-of-1RM training table with load and rep targets.
Calorie Needs (BMR + TDEE) — Daily calorie needs: Mifflin–St Jeor basal metabolic rate, total daily energy expenditure by activity level, and a cut/maintain/bul