Health
Health Calculators
BMI, calorie needs, age, body fat, and more. All free, no signup required.
BMI Calculator
Body Mass Index with gauge, category, and healthy weight range
Calorie Calculator
Daily calorie needs (TDEE) with macro targets by goal
TDEE Calculator
Total daily energy expenditure with activity multiplier
BMR Calculator
Basal Metabolic Rate using Mifflin-St Jeor
Body Fat Calculator
Estimate body fat % using the U.S. Navy Method
Ideal Weight Calculator
Ideal body weight using Devine, Robinson, Miller, and Hamwi formulas
Protein Calculator
Daily protein intake by weight, activity, and goal
Macro Calculator
Protein, carbs, and fat grams from calorie target
Calories Burned Calculator
40+ activities with MET values and food equivalents
Age Calculator
Exact age in years, months, days plus next birthday
Due Date Calculator
Pregnancy due date from last menstrual period
Ovulation Calculator
Ovulation date and fertile window from cycle length
Period Calculator
12-month period prediction with cycle phase detection
Target Heart Rate Calculator
Heart rate zones by age, plus the Karvonen method
Pace Calculator
Running pace, finish time, or distance for any race
Pregnancy Weight Gain Calculator
IOM-recommended weight gain range by pre-pregnancy BMI
Pregnancy Week Calculator
How far along you are, your trimester, and baby size by week
Conception Date Calculator
Estimated conception date and window from due date or LMP
Child BMI Percentile Calculator
BMI percentile for kids and teens by age and sex
BAC Calculator
Blood alcohol content estimate with time back to zero
Height Calculator
Predict a child's adult height from parents or current age