Health Hub
Health & Fitness Calculators
35+ free tools for fitness, nutrition, pregnancy, and health tracking. Accurate, instant, no signup.
Fitness
Body composition, weight, and athletic performance
BMI Calculator
Body Mass Index
Calorie Calculator
Daily calorie needs
Body Fat Calculator
Body fat percentage
BMR Calculator
Basal metabolic rate
Ideal Weight Calculator
Your ideal weight by height
Pace Calculator
Running pace & speed
Army Body Fat Calculator
US Army circumference method
Lean Body Mass Calculator
Fat-free body mass
Healthy Weight Calculator
Healthy weight range
Calories Burned Calculator
Exercise calorie burn
One Rep Max Calculator
Maximum lift estimate (1RM)
Target Heart Rate Calculator
Optimal training heart rate
Pregnancy
Due date, conception, ovulation, and pregnancy tracking
Pregnancy Calculator
Due date, week, trimester
Pregnancy Weight Gain
IOM recommended gain
Conception Calculator
Estimated conception date
Due Date Calculator
Naegele's rule EDD
Ovulation Calculator
Fertile window finder
Conception Calculator
From LMP or due date
Period Calculator
Next period predictor
Nutrition & Macros
Daily macro targets, TDEE, and dietary planning
Macro Calculator
Daily protein, carbs, fat
Carbohydrate Calculator
Daily carb intake
Protein Calculator
Daily protein needs
Fat Intake Calculator
Daily dietary fat grams
TDEE Calculator
Total daily energy expenditure
Other Health
GFR, body type, BSA, BAC and more