Body composition, energy, fitness, recovery, and pregnancy estimates. Live tools are linked first; planned tools are labeled until the calculator and supporting content are ready.
Open a live tool for calculator inputs, results, formula context, and published examples.
Estimate body mass index from height and weight, with adult screening category context.
Estimate energy expenditure from activity, body weight, and duration using MET values.
Estimate aerobic capacity from a heart-rate ratio or a timed running effort.
Estimate total daily energy expenditure from body measurements, activity, and goal context.
Estimate a one-repetition maximum from a completed weight and rep set across common formulas.
Estimate body-fat percentage from height and circumference measurements using the U.S. Navy method.
Estimate cardiac output and cardiac index from oxygen content and Fick-method inputs.
Estimate an ovulation day and fertile window from the first day of a period and cycle length.
Model a conservative, moderate, or aggressive calorie target and projected weight-loss pace.
Estimate daily protein, carbohydrate, and fat targets from body measurements, activity, and a goal.
Compare recent sleep with an age-based target and estimate accumulated sleep debt or surplus.
Compare pregnancy weight gain with broad Institute of Medicine ranges by pre-pregnancy BMI.
Estimate a pregnancy due date from the last menstrual period, conception, or IVF transfer date.