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Converts scale weight, height, girths and skinfolds into the body-composition numbers coaches and clinicians actually record…
The energy-balance core of the domain: resting metabolic rate prediction equations, total daily expenditure, exercise energy cost…
Splits a calorie target into grams of protein, carbohydrate and fat, and covers the practical nutrition math around hydration…
Barbell math for lifters and coaches: one-rep-max estimation, autoregulated load prescription, competition scoring formulas and…
Pace, distance and time math plus the published prediction models runners and coaches use to set race targets and equivalent…
Prescribes training intensity from heart rate and estimates VO2max from the standard field tests used in labs, PE classes and…
Date and percentile math for expectant parents, midwives and pediatric clinics, from conception timing through gestational weight…
Everyday health math outside the gym: sleep-cycle timing, stimulant and alcohol pharmacokinetics, the cost of smoking, and…
Most used in health, fitness & nutrition
- BMI CalculatorWHO adult BMI classificationBody mass index compares your weight with your height on a single scale, and it is the number every screening tool, insurance…
- Navy Body Fat CalculatorUS Navy circumference method (Hodgdon & Beckett, 1984)The US Navy circumference method estimates body fat from a tape measure and nothing else. It predicts body density from the…
- Ideal Body Weight CalculatorDevine (1974), Robinson (1983), Miller (1983) and Hamwi (1964) formulasIdeal body weight is a height-and-sex reference figure, not a health target. It exists because pharmacists needed a stable…
- BMR CalculatorMifflin-St Jeor equation (1990)Basal metabolic rate is the energy your body spends doing nothing — running your heart, brain, kidneys and liver while you lie…
- TDEE CalculatorMifflin-St Jeor and Katch-McArdle equations with conventional physical activity levelsTotal daily energy expenditure is what you actually burn in twenty-four hours: resting metabolism, everything you do on your…
- Calories Burned by Activity CalculatorACSM MET equation; MET values from the 2011 Compendium of Physical ActivitiesEnergy cost scales with how hard the activity is and how much body you have to move, and the MET system captures both in one…
- Calorie Deficit Calculator3,500 kcal per pound of body fat (Wishnofsky rule)A calorie deficit is the gap between what you burn and what you eat, and this calculator turns the weight-loss rate you want…
- Weight Loss Timeline CalculatorMifflin-St Jeor basal rate with weekly re-evaluation of expenditureDividing the weight you want to lose by a weekly rate gives an answer that is always too optimistic, because expenditure falls…
- Macro Split CalculatorAtwater energy factors (4/4/9 kcal per gram) and IOM acceptable macronutrient distribution rangesA calorie target tells you how much to eat; a macro split tells you what. This calculator turns a daily calorie figure and a…
- Protein Intake CalculatorIOM Dietary Reference Intakes and the ISSN position stand on protein and exerciseProtein requirements scale with body size and with what you are asking your body to do, so the answer is a range rather than a…
- Daily Water Intake CalculatorEFSA and Institute of Medicine adequate intakes for waterThere is no single correct daily water figure, because fluid needs scale with body size, sweat losses and climate. What there…
- One Rep Max CalculatorEpley, Brzycki, Lombardi, Lander and O'Conner repetition-maximum equationsA one rep max is the heaviest load you can lift once with good technique, and estimating it from a set you have already done is…