Health calculators
Body metrics, nutrition and fitness planning.
Blood Alcohol Calculator
Estimated BAC using the Widmark formula.
BMI Calculator
Body Mass Index from height and weight, with WHO category.
BMR Calculator
Basal metabolic rate using the Mifflin-St Jeor equation.
Body Fat Calculator
Estimate body fat percentage with the US Navy method.
Body Surface Area Calculator
Mosteller BSA, widely used for dosing.
Calorie Calculator
Daily calorie needs based on activity level and goal.
Child Height Predictor
Mid-parental height estimate for a child.
Healthy Weight Calculator
Healthy weight range for your height based on BMI 18.5–24.9.
Heart Rate Calculator
Maximum heart rate and training zones by age.
Ideal Weight Calculator
Devine formula ideal body weight from height.
Lean Body Mass Calculator
Estimate fat-free mass using the Boer formula.
Macro Split Calculator
Turn a calorie target into protein, carb and fat grams.
Ovulation Calculator
Fertile window and ovulation day from your cycle.
Pace Calculator
Running pace per kilometre and mile from distance and time.
Pregnancy Due Date Calculator
Estimated due date from the first day of your last period.
Protein Intake Calculator
Daily protein target based on weight and goal.
Sleep Cycle Calculator
Best wake-up times based on 90-minute cycles.
Smoking Cost Calculator
What a smoking habit costs over time.
TDEE Calculator
Total daily energy expenditure from BMR and activity.
VO2 Max Calculator
Aerobic fitness estimate from a 12-minute run.
Waist to Hip Ratio Calculator
A quick cardiovascular risk indicator.
Water Intake Calculator
Recommended daily water intake for your body weight.