Fitness & Health Calculators
BMI, calorie, body fat, and other calculators to track your health and fitness goals.
- BMI CalculatorCalculate your Body Mass Index (BMI) from your height and weight, see your weight category, and find your healthy weight range — in US or metric units.
- Calorie CalculatorEstimate the daily calories you need to maintain, lose, or gain weight using Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle and your activity level.
- Body Fat CalculatorEstimate your body fat percentage with the U.S. Navy tape method, see your body-fat category, fat mass, lean mass, and how you compare to the ideal for your age — in US or metric units.
- BMR CalculatorCalculate your Basal Metabolic Rate (BMR) — the calories your body burns at rest — using the Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle equation, with daily needs by activity level.
- Ideal Weight CalculatorEstimate your ideal body weight from your height and sex using the Robinson, Miller, Devine, and Hamwi formulas, alongside the healthy weight range for your height.
- Pace CalculatorCalculate running pace, finish time, or distance — enter any two and solve the third. Shows pace per mile and per kilometer, speed, and finish times for common race distances.
- Army Body Fat CalculatorEstimate body fat with the U.S. Army 2023 one-site tape method (ALARACT 046/2023) from your weight and abdominal circumference, and see if you meet the AR 600-9 standard for your age and sex.
- Pregnancy CalculatorEstimate your due date and track how far along you are from your last period, conception date, ultrasound, IVF transfer, or a known due date — with conception date, trimester, and key milestone dates.
- Pregnancy Conception CalculatorEstimate when conception likely occurred from your due date, last menstrual period, or an ultrasound — with the probable intercourse window, due date, and last-period date.
- Due Date CalculatorEstimate your pregnancy due date from your last period, conception date, ultrasound, or IVF transfer — with the estimated conception date and early, full, and late-term windows.