Health & Fitness
Health calculators for BMI, calories, fitness goals, and wellness.
Showing 37 of 37 tools
Baby Age Calculator
Calculate a baby's age in days, weeks, and months.
Blood Alcohol Calculator
Estimate blood alcohol content and impairment level.
BMI Calculator
Free BMI calculator to find your body mass index and weight category.
BMR Calculator
Calculate your basal metabolic rate (BMR) using the Mifflin-St Jeor formula.
Body Age Calculator
Estimate your body age using basic health markers.
Body Fat Calculator
Estimate body fat percentage using the U.S. Navy circumference method.
Calorie Calculator
Calculate daily calorie needs for maintenance, weight loss, or gain.
Calorie Deficit Calculator
Calculate daily calorie targets based on your desired deficit.
Calories Burned Calculator
Estimate calories burned during exercise using activity intensity and time.
Carb Calculator
Calculate daily carbohydrate intake based on calories and macro split.
Child Growth Percentile Calculator
Calculate height, weight, BMI, and head circumference percentiles.
Child Height Predictor
Estimate a child's adult height using parent heights.
Corrected Age Calculator
Calculate corrected age for preterm infants.
Due Date Calculator
Estimate pregnancy due date based on last menstrual period and cycle length.
Fetal Weight Percentile Calculator
Estimate fetal weight percentile by gestational age.
FFMI Calculator
Calculate fat-free mass index for athletes.
Heart Rate Zone Calculator
Calculate heart rate training zones using your age and resting heart rate.
Ideal Weight Calculator
Estimate ideal body weight using the Devine formula and height.
Intermittent Fasting Calculator
Plan intermittent fasting windows and meals.
Karvonen Heart Rate Calculator
Calculate training heart rate zones using the Karvonen method.
Lean Body Mass Calculator
Calculate lean body mass using weight, height, and sex.
Macro Calculator
Calculate daily macronutrients based on calorie and macro targets.
Max Heart Rate Calculator
Calculate your maximum heart rate and target training zone.
One Rep Max Calculator
Estimate your one rep max and training max from a working set.
Ovulation Calculator
Estimate ovulation date and fertile window based on cycle length.
Pregnancy Week Calculator
Calculate current pregnancy week, trimester, and due date.
Pregnancy Weight Gain Calculator
Estimate healthy total weight gain during pregnancy.
Protein Calculator
Estimate daily protein intake based on weight and activity level.
Running Pace Calculator
Calculate running pace and speed from distance and time.
Sleep Calculator
Find ideal bedtimes based on sleep cycles.
Steps to Calories Calculator
Convert steps walked into estimated calories burned.
TDEE by Activity Calculator
Calculate TDEE with detailed activity breakdown.
TDEE Calculator
Calculate your total daily energy expenditure based on activity level.
VO2 Max Calculator
Estimate VO2 max and fitness level from common tests.
Waist to Hip Ratio Calculator
Calculate waist-to-hip ratio and assess health risk category.
Water Intake Calculator
Estimate daily water intake based on weight and activity level.
Wilks Score Calculator
Calculate Wilks score and strength level for powerlifting.