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Weight & Body Composition
01 • 6 toolsBMI CalculatorCalculate your Body Mass Index (BMI) and see which weight category it falls into.
Body Fat CalculatorEstimate your body fat percentage using the U.S. Navy method.
Ideal Weight CalculatorEstimate your ideal body weight based on height and sex.
Healthy Weight CalculatorFind the healthy weight range for your height based on BMI guidelines.
Army Body Fat CalculatorEstimate body fat percentage using the military tape-test method.
Lean Body Mass CalculatorCalculate your lean body mass using the Boer formula.
Nutrition & Caloric Intake
02 • 5 toolsCalorie CalculatorEstimate your daily calorie needs to maintain, lose, or gain weight.
BMR CalculatorCalculate your Basal Metabolic Rate — the calories your body burns at rest.
TDEE CalculatorCalculate your Total Daily Energy Expenditure based on activity level.
Macro CalculatorBreak down your daily calorie target into protein, carb, and fat grams.
Calories Burned CalculatorEstimate calories burned during common activities and exercises.
Sleep & Biological Cycles
03 • 6 toolsSleep CalculatorFind the best bedtime or wake-up time based on natural sleep cycles.
Wake Up Time CalculatorFind the best time to wake up based on your bedtime and sleep cycles.
Sleep Cycle CalculatorCalculate how many complete sleep cycles you'll get between bedtime and wake-up.
Nap CalculatorFind the ideal wake-up time for a power nap, recovery nap, or full sleep cycle nap.
Sleep Debt CalculatorCalculate how much sleep debt you've built up compared to your recommended sleep.
Bedtime CalculatorFind the best time to go to bed based on when you need to wake up.
Pregnancy & Family Planning
04 • 7 toolsPregnancy CalculatorFind out how many weeks pregnant you are and your estimated due date.
Due Date CalculatorEstimate your baby's due date based on your last menstrual period.
Ovulation CalculatorEstimate your ovulation date and fertile window based on your cycle.
Conception CalculatorEstimate your likely conception date based on your due date.
Period CalculatorPredict your next few menstrual period dates based on your cycle.
Pregnancy Conception CalculatorEstimate your conception date and due date from your last period.
Pregnancy Weight Gain CalculatorFind the recommended pregnancy weight gain range based on your pre-pregnancy BMI.
Additional Tools & Utilities
05 • 4 toolsOne Rep Max CalculatorEstimate your one-rep max for any lift using the Epley formula.
Target Heart Rate CalculatorCalculate your target heart rate training zone for effective exercise.
BAC CalculatorEstimate blood alcohol content for educational purposes. Never use this to decide whether it's safe to drive.
Pace CalculatorCalculate your running or walking pace and speed.