Health & Fitness Calculators
Free calculators for BMI, calories, macros, and more. Track your health and fitness goals.
Most Popular
BMI Calculator
Calculate your Body Mass Index
Calorie Calculator
Find your daily calorie needs based on your age, gender, weight, and activity level.
Macro Calculator
Calculate your optimal macronutrient ratios for protein, carbs, and fat. Choose from preset diet styles or create your own custom split.
TDEE Calculator
Calculate your Total Daily Energy Expenditure to understand how many calories you burn each day.
All Health Calculators
BMI Calculator
Calculate your Body Mass Index
Calorie Calculator
Find your daily calorie needs based on your age, gender, weight, and activity level.
Macro Calculator
Calculate your optimal macronutrient ratios for protein, carbs, and fat. Choose from preset diet styles or create your own custom split.
TDEE Calculator
Calculate your Total Daily Energy Expenditure to understand how many calories you burn each day.
Body Fat Calculator
Calculate your body fat percentage using multiple methods including the US Navy formula, RFM, and BMI estimation. See your body composition and category.
Ideal Weight Calculator
Calculate your ideal body weight using four established formulas: Robinson, Miller, Hamwi, and Devine. Adjust for your body frame size.
BMR Calculator
Calculate your Basal Metabolic Rate - the number of calories your body burns at complete rest. Compare results from Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle formulas.
Water Intake Calculator
Calculate your daily water needs based on body weight, activity level, and climate.
Protein Calculator
Calculate your daily protein needs based on body weight, fitness goals, and activity level.
One Rep Max Calculator
Calculate your one-rep max (1RM) using multiple proven formulas. Plan your training percentages and rep ranges effectively.
Heart Rate Zones Calculator
Calculate your training heart rate zones for optimal cardio exercise. Uses multiple formulas for accuracy.
Pace Calculator
Calculate your running or cycling pace, time, or distance. Get split times for your races and training runs.
Pregnancy Calculators
Tools for expecting parents
Due Date Calculator
Calculate your pregnancy due date using your last menstrual period, conception date, IVF transfer, or ultrasound measurements.
Pregnancy Calculator
Calculate your due date, current trimester, and pregnancy milestones. Track week-by-week development.
Ovulation Calculator
Calculate your fertile window and ovulation date. Predict the best days for conception.