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.
Calculate your Body Mass Index and see where you fall on the BMI scale. Supports both metric and imperial units.
Estimate your body fat percentage using various measurement methods.
Calculate body fat percentage using military standards and measurement protocols.
Calculate your lean body mass to understand muscle composition.
Calculate your body surface area for medical and health purposes.
Determine your body type to optimize fitness and nutrition plans.
Calculate your ideal weight based on height, body frame, and gender.
Find your healthy weight range based on multiple health factors.
Calculate your daily calorie needs based on your age, gender, activity level, and goals.
Calculate your Basal Metabolic Rate - the calories your body burns at rest.
Calculate your Total Daily Energy Expenditure for accurate calorie tracking.
Calculate your optimal macronutrient ratios for your fitness goals.
Calculate your daily protein needs based on activity level and goals.
Calculate your optimal carbohydrate intake for energy and performance.
Calculate your healthy dietary fat needs for optimal health.
Calculate calories burned during exercise and daily activities.
Track your pregnancy timeline with week-by-week milestones and trimester information.
Track healthy pregnancy weight gain based on your pre-pregnancy BMI.
Estimate your conception date based on your due date or ultrasound results.
Calculate your estimated due date and pregnancy milestones.
Track your ovulation cycle and fertile window for conception planning.
Track your menstrual cycle and predict future periods.
Calculate running, cycling, and swimming pace for training and race planning.
Calculate your one-rep max strength for weightlifting exercises.
Calculate your target heart rate zones for effective cardio training.
Your health data never leaves your device. All calculations happen locally in your browser.
Our calculators use established formulas and equations from peer-reviewed research.
Easily switch between metric and imperial units. Works for users worldwide.