Health & Fitness calculators
Track BMI, daily calorie needs (TDEE), pregnancy milestones, and body fat. Enter your numbers, see the result immediately, and review the formula and assumptions below it.
Available now
18
calculators
BMI Calculator
Calculate your Body Mass Index (BMI) using metric or imperial units and learn your weight status category.
Calorie Calculator (TDEE)
Find your Total Daily Energy Expenditure (TDEE) and calculate calories needed for weight loss, maintenance, or gain.
Weight Loss Goal Calculator
Find the daily calorie deficit required to reach your target weight by a specific date.
Pregnancy Due Date Calculator
Calculate your estimated due date, conception date, and current gestational week/milestones.
Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy body circumference method.
Water Intake Calculator
Calculate how much water you should drink daily based on your body weight and exercise activity.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation to find how many calories your body burns at rest.
Ideal Weight Calculator
Estimate your ideal body weight based on height and sex using the Devine and Robinson clinical formulas.
Body Frame Size Calculator
Determine whether you have a small, medium, or large body frame using the height-to-wrist-circumference ratio method.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) and see your World Health Organization cardiovascular risk category.
Heart Rate Zone Calculator
Find your target heart rate training zones for warm-up, fat burn, cardio, and max-effort workouts based on your age.
Ovulation Calculator
Estimate your ovulation date and fertile window based on the first day of your last period and average cycle length.
Conception Date Calculator
Estimate your approximate conception date based on your last menstrual period or your estimated due date.
Child Growth Percentile Calculator
Get a simplified estimate of whether your child's height and weight fall below, at, or above the typical average for their age.
Baby Weight Gain Calculator
Track how much weight your newborn has gained since birth and compare it to typical newborn weight gain rates.
Menstrual Cycle Calculator
Predict your next three period start dates and fertile windows based on your last period and average cycle length.
Pregnancy Weight Gain Calculator
Find your recommended total pregnancy weight gain range based on your pre-pregnancy BMI, using Institute of Medicine guidelines.
Menopause Age Calculator
Get a rough statistical estimate of when you might reach menopause based on average age, genetics, and smoking status.