All calculatorsHealth
Health Calculators
BMI, TDEE, BMR, body fat, ideal weight, pregnancy due date, and ovulation calculators. Estimates only — not medical advice. Free, instant, client-side.
Health tools
BMI Calculator
Calculate body mass index with metric or imperial units and see your BMI category.
BMR & Calorie Calculator
Estimate basal metabolic rate and daily calories (TDEE) by age, sex, height, weight, and activity.
TDEE Calculator
Calculate total daily energy expenditure (maintenance calories) from BMR, activity level, and optional body fat %.
BMR Calculator
Calculate basal metabolic rate with Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle formulas.
Body Fat Percentage Calculator
Estimate body fat percentage with the US Navy circumference method or a BMI-based estimate.
Ideal Weight Calculator
Estimate ideal body weight with Robinson, Miller, Devine, and Hamwi formulas plus BMI healthy range.
Pregnancy Due Date Calculator
Estimate your pregnancy due date from last menstrual period, conception date, ultrasound, or IVF transfer.
Ovulation Calculator
Estimate ovulation day and fertile window from last period date, cycle length, and luteal phase.
Health & Fitness
Body metrics, metabolism, and reproductive health estimates for wellness planning.
- BMI CalculatorBody mass index with metric and imperial units
- BMR & Calorie CalculatorDaily calorie needs by activity level
- TDEE CalculatorMaintenance calories from BMR and activity
- BMR CalculatorBasal metabolic rate with formula options
- Body Fat Percentage CalculatorNavy method and BMI body fat estimates
- Ideal Weight CalculatorIdeal weight range from clinical formulas
- Pregnancy Due Date CalculatorDue date from LMP, conception, ultrasound, or IVF
- Ovulation CalculatorFertile window and ovulation day estimates