Health Calculators
Free online health calculators and tools, including Basal Metabolic Rate Calculator, BMI Calculator, Body Fat Calculator. Fast, simple and easy to use.
17 toolsBasal Metabolic Rate Calculator
Compare named equations for estimated resting energy expenditure.
BMI Calculator
Body Mass Index with healthy weight range, BMR, TDEE, and body fat percentage.
Body Fat Calculator
Estimate body fat percentage from circumference measurements.
Calorie Calculator
Daily calorie needs by age, weight, height, and activity level.
Calories Burned Calculator
Estimate activity energy expenditure from a curated MET table.
Due Date Calculator
Estimated pregnancy due date and trimester from your last period.
Heart Rate Zone Calculator
Compare predicted maximum-heart-rate and heart-rate-reserve training zones.
Ideal Weight Calculator
Compare four historical height-based weight formulas and limitations.
Lean Body Mass Calculator
Compare Boer, James, and Hume lean-mass estimates.
Macro Calculator
Allocate a calorie target across protein, carbohydrate, and fat.
One Rep Max Calculator
Compare established one-repetition-maximum estimates from a submaximal set.
Protein Intake Calculator
See context-based daily protein ranges by body weight and training type.
Running Pace Calculator
Convert distance and duration into pace, speed, and split estimates.
Sleep Calculator
See age-based sleep-duration guidance and secondary bedtime timings.
TDEE Calculator
Compare named BMR equations adjusted by transparent activity multipliers.
Water Intake
Daily hydration target based on bodyweight and activity.
Weight Loss Calculator
Calculate weight loss goals, calorie deficit, and time to reach target weight.