Health & Fitness Calculators

BMI Calculator

Calculate your Body Mass Index (BMI) and see which weight category you fall into. Supports both metric and imperial units.

Calorie Calculator

Calculate your daily calorie needs based on age, height, weight, and activity level. Get targets for weight loss, maintenance, or muscle gain.

Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method. Calculate lean body mass and fat mass from measurements.

BMR Calculator

Calculate your Basal Metabolic Rate (BMR) — the calories burned at complete rest. Uses Mifflin-St Jeor and Harris-Benedict equations.

Macro Calculator

Calculate your daily protein, carbohydrate, and fat macro targets based on your goal (weight loss, muscle gain, or maintenance).

Ideal Weight Calculator

Calculate your ideal body weight using multiple formulas (Hamwi, Devine, Robinson, Miller). Find your healthy weight range by height.

Pregnancy Calculator

Calculate your due date, current pregnancy week, and key milestones based on your last menstrual period (LMP) or conception date.

Due Date Calculator

Calculate your baby's due date from last menstrual period or conception date. Includes a full pregnancy timeline and trimester breakdown.

Pregnancy Conception Calculator

Find your most fertile days and ovulation window. Calculate the best time to conceive based on your menstrual cycle.

Pregnancy Weight Gain Calculator

Calculate the recommended weight gain during pregnancy based on pre-pregnancy BMI. Get trimester-by-trimester targets.

Pace Calculator

Calculate running pace, distance, or time for any race. Convert between min/mile and min/km. Plan for 5K, 10K, half marathon, and marathon.

Army Body Fat Calculator

Calculate body fat percentage using the U.S. Army body fat standard method. Determine if you meet Army, Navy, or Air Force standards.

Height Calculator

Predict a child's adult height based on parents' heights using the mid-parental height method. Also converts height between units.

Sleep Calculator

Calculate the best bedtime or wake-up time based on 90-minute sleep cycles. Wake up refreshed by timing sleep cycles correctly.

Bra Size Calculator

Calculate your correct bra size from band and bust measurements. Includes US, UK, EU, and AU size conversions.

Ovulation Calculator

Calculate your ovulation date and fertile window for the next 3 months. Track your cycle to maximize chances of conception.

TDEE Calculator

Calculate your Total Daily Energy Expenditure (TDEE) — the total calories you burn each day. Set accurate calorie goals for any fitness objective.

Water Intake Calculator

Calculate your daily water intake recommendation based on weight, activity level, and climate. Stay properly hydrated.

Body Surface Area Calculator

Calculate Body Surface Area (BSA) using Mosteller, DuBois, or Haycock formula. Used in medical dosing and cardiology.

Calories Burned Calculator

Calculate calories burned during exercise by activity type, intensity, duration, and body weight using MET (Metabolic Equivalent) values.