Fitness Calculators
Track body mass index, body fat percentage, lean mass, metabolic rate, training pace and strength benchmarks with clinically referenced formulas.
BMI Calculator
Body Mass Index from your height and weight
Calorie Calculator
Daily calories to maintain, lose or gain weight
Body Fat Calculator
Body fat % via the US Navy tape method
BMR Calculator
Calories your body burns at rest
Ideal Weight Calculator
Ideal weight from four classic formulas
Pace Calculator
Solve running pace, time or distance
Army Body Fat Calculator
US Army tape test with enlistment standards
Lean Body Mass Calculator
Fat-free mass from weight, height & body fat
Healthy Weight Calculator
Normal weight range for your height
Calories Burned Calculator
Calorie burn per activity using MET values
One Rep Max Calculator
Estimate 1RM from a submaximal set
Target Heart Rate Calculator
Training heart-rate zones from your age
Pregnancy Calculators
Estimate due dates, gestational age, conception windows, ovulation days and healthy pregnancy weight gain using standard obstetric methods.
Pregnancy Calculator
Due date and gestational age tracker
Pregnancy Weight Gain Calculator
Recommended gain range by week (IOM guidelines)
Pregnancy Conception Calculator
Estimate when conception occurred
Due Date Calculator
Estimated delivery date from LMP or conception
Ovulation Calculator
Predict ovulation and your fertile window
Conception Calculator
Best days to conceive from your cycle
Period Calculator
Predict your next period and cycle days
Nutrition & Clinical Calculators
Plan macronutrient, protein, carbohydrate and fat targets, estimate TDEE, kidney function, body surface area and blood alcohol concentration.
Macro Calculator
Protein, carb & fat split from calorie goals
Carbohydrate Calculator
Daily carbohydrate target in grams
Protein Calculator
Daily protein target in grams
Fat Intake Calculator
Daily dietary fat target in grams
TDEE Calculator
Total daily energy expenditure estimate
GFR Calculator
Estimated kidney function from creatinine
Body Type Calculator
Ectomorph, mesomorph or endomorph estimate
Body Surface Area Calculator
BSA in m² for dosing & cardiology
BAC Calculator
Estimate blood alcohol content by Widmark