Body Composition
BMI Calculator
Calculate your Body Mass Index and see where you fall on the standard scale.
Body Fat Calculator
Estimate your body fat percentage using the US Navy circumference method.
Ideal Weight Calculator
Find your ideal body weight range based on height and frame using proven formulas.
Lean Body Mass Calculator
Estimate how much of your total weight is lean tissue (muscle, bone, organs).
Waist-to-Hip Ratio
Calculate your WHR and learn what it says about your cardiovascular health risk.
Healthy Weight Calculator
Find the full healthy weight range for your height, based on standard BMI guidelines.
Body Surface Area
Calculate BSA using the Mosteller formula. Used in medical dosing and burn assessments.
BMI for Children
Pediatric BMI calculator using age-specific percentile ranges for kids aged 2 to 20.
Calories and Nutrition
Calorie Calculator (TDEE)
Find out how many calories you need each day based on your goals and activity level.
BMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at complete rest.
Macro Calculator
Get a personalized protein, carb, and fat breakdown based on your goal and body stats.
Protein Intake Calculator
Calculate your daily protein target for muscle gain, fat loss, or maintenance.
Water Intake Calculator
Find out how much water you should drink each day based on your weight and activity.
Intermittent Fasting Calculator
Get your eating and fasting windows for 16:8, 18:6, or any IF schedule.
Fitness and Exercise
Calories Burned Calculator
Estimate calories burned by activity type, duration, and body weight.
Walking Calorie Calculator
See how many calories you burn walking at different speeds and distances.
Running Pace Calculator
Calculate your pace, speed, or finish time for any distance run.
Heart Rate Zone Calculator
Find your max heart rate and 5 training zones for optimal cardio workouts.
Target Heart Rate Calculator
Calculate your target heart rate range for aerobic and fat-burning exercise.
VO2 Max Calculator
Estimate your VO2 Max — a key measure of cardiovascular fitness and endurance capacity.
One Rep Max Calculator
Estimate your 1RM for any lift using the Epley formula. Great for programming strength work.
Medical and Clinical
Blood Pressure Classifier
Enter your systolic and diastolic readings to see which blood pressure category you fall in.
Cholesterol Ratio Calculator
Calculate your total cholesterol to HDL ratio and assess your cardiovascular risk.
Diabetes Risk Calculator
Estimate your risk for Type 2 diabetes based on key lifestyle and health factors.
Creatinine Clearance Calculator
Estimate kidney function (eGFR) using the Cockcroft-Gault equation.
Wellness and Life
Sleep Calculator
Find the best times to wake up or fall asleep based on 90-minute sleep cycles.
Age Calculator
Calculate your exact age in years, months, and days from any birth date.
Pregnancy Due Date Calculator
Estimate your baby's expected due date from your last menstrual period.
Ovulation Calculator
Find your fertile window and estimated ovulation date based on your cycle length.
Due Date Calculator
Calculate an estimated due date from conception date or ultrasound measurement.