Health Calculators

Calculate your intermittent fasting schedule.

Calculate your Body Mass Index (BMI) using your height and weight.

Calculate your daily calorie needs based on your age, height, weight, and activity level.

Calculate your daily protein, carbohydrate, and fat targets based on your calorie goal and fitness objective.

Predict your fertile window and most likely ovulation date based on your last period and average cycle length.

Find the best bedtime or wake-up time based on 90-minute sleep cycles.

Calculate your estimated due date based on your last menstrual period or conception date.

Find out exactly how many weeks pregnant you are based on your last menstrual period.

Calculate your dog's age in human years using the scientifically accurate method based on dog size and breed.

Calculate your running pace, finish time, or distance for any race.

Estimate your body fat percentage using the US Navy circumference method.

Calculate body fat percentage using the US Army method with circumference measurements.

Calculate your Basal Metabolic Rate (BMR) — the number of calories your body burns at complete rest.

Calculate your Total Daily Energy Expenditure (TDEE) — the total calories you burn per day based on your body stats and activity level.

Calculate your daily recommended water intake based on body weight, activity level, and climate.

Calculate your daily protein requirements based on body weight, activity level, and fitness goal.

Estimate your one-rep maximum (1RM) for any lift — bench press, squat, deadlift — from a submaximal effort.

Calculate your target heart rate zones for fat burning, cardio fitness, and peak performance.