Health & Fitness Calculators
Free, accurate health and fitness calculators for BMI, calories, body fat, macros, pregnancy, fitness metrics, and more. All calculations run locally in your browser - your health data stays completely private.
Body Composition
BMI Calculator
Calculate your Body Mass Index and see where you fall on the BMI scale. Supports both metric and imperial units.
Body Fat Calculator
Estimate your body fat percentage using various measurement methods.
Army Body Fat Calculator
Calculate body fat percentage using military standards and measurement protocols.
Lean Body Mass Calculator
Calculate your lean body mass to understand muscle composition.
Body Surface Area Calculator
Calculate your body surface area for medical and health purposes.
Body Type Calculator
Determine your body type to optimize fitness and nutrition plans.
Ideal Weight Calculator
Calculate your ideal weight based on height, body frame, and gender.
Healthy Weight Calculator
Find your healthy weight range based on multiple health factors.
Nutrition
Calorie Calculator
Calculate your daily calorie needs based on your age, gender, activity level, and goals.
BMR Calculator
Calculate your Basal Metabolic Rate - the calories your body burns at rest.
TDEE Calculator
Calculate your Total Daily Energy Expenditure for accurate calorie tracking.
Macro Calculator
Calculate your optimal macronutrient ratios for your fitness goals.
Protein Calculator
Calculate your daily protein needs based on activity level and goals.
Carbohydrate Calculator
Calculate your optimal carbohydrate intake for energy and performance.
Fat Intake Calculator
Calculate your healthy dietary fat needs for optimal health.
Calories Burned Calculator
Calculate calories burned during exercise and daily activities.
Pregnancy & Fertility
Pregnancy Calculator
Track your pregnancy timeline with week-by-week milestones and trimester information.
Pregnancy Weight Gain Calculator
Track healthy pregnancy weight gain based on your pre-pregnancy BMI.
Conception Calculator
Estimate your conception date based on your due date or ultrasound results.
Due Date Calculator
Calculate your estimated due date and pregnancy milestones.
Ovulation Calculator
Track your ovulation cycle and fertile window for conception planning.
Period Calculator
Track your menstrual cycle and predict future periods.
Fitness & Performance
Pace Calculator
Calculate running, cycling, and swimming pace for training and race planning.
One Rep Max Calculator
Calculate your one-rep max strength for weightlifting exercises.
Target Heart Rate Calculator
Calculate your target heart rate zones for effective cardio training.
Why Use Our Health Calculators?
100% Private
Your health data never leaves your device. All calculations happen locally in your browser.
Science-Based
Our calculators use established formulas and equations from peer-reviewed research.
Unit Conversion
Easily switch between metric and imperial units. Works for users worldwide.