Health Calculators
BMI, TDEE, calories, pregnancy, and wellness.
BMI Calculator
Enter your height and weight to get your BMI and category (underweight, normal, overweight, or obese). BMI is a screening tool used by the CDC to estimate weight-related health risk for the general adult population.
TDEE Calculator
Enter your stats and activity level to instantly see how many calories you need per day to maintain your weight — plus targets for losing or gaining.
BMR Calculator
Enter your sex, age, height, and weight to see your BMR — how many calories you burn at rest before any activity.
Calorie Deficit Calculator
Enter your maintenance calories, daily intake target, and weight goals to see your weekly loss rate and estimated goal date.
Body Fat Calculator
Enter your height, neck, and waist measurements (plus hips if female) to instantly see your estimated body fat percentage and category.
Pregnancy Due Date Calculator
Enter the first day of your last menstrual period (LMP) to instantly see your estimated due date, gestational age, trimester, and estimated conception date.
Ovulation Calculator
Enter your last period date and cycle length to see your estimated ovulation date and the 6-day fertile window when conception is most likely.
Ideal Weight Calculator
Enter your height and sex to see your ideal weight range from three validated formulas (Devine, Robinson, Miller) in both lbs and kg.
Calories Burned Walking Calculator
Enter your weight, walking pace, and duration to instantly see how many calories you burn.
Water Intake Calculator
Enter your weight, activity level, and climate to see your personalized daily water intake recommendation in ounces, cups, and liters.
Sleep Cycle Calculator
Enter your wake time or bedtime to find the optimal sleep times based on 90-minute sleep cycles.
Heart Rate Zone Calculator
Enter age and resting heart rate to calculate your 5 heart rate training zones.
Blood Alcohol Content (BAC) Calculator
Enter drinks, weight, gender, and hours elapsed to estimate BAC and time to sobriety.
Calories Burned Running Calculator
Enter weight, distance, and pace to calculate calories burned running.
Waist-to-Hip Ratio Calculator
Enter waist and hip measurements to calculate your waist-to-hip ratio and health risk level.
Pregnancy Weight Gain Calculator
Enter pre-pregnancy BMI, current weight, and weeks pregnant to check if your weight gain is on track.
Lean Body Mass Calculator
Enter weight, height, and gender to calculate lean body mass and estimated body fat percentage.