Health & Fitness Calculators

BMI Calculator

Free BMI calculator: Instantly find your Body Mass Index & health category. Supports metric & imperial units. Know your health status.

Calorie Calculator

Free calorie calculator: Instantly calculate daily calorie needs based on age, height, weight & activity level. Lose weight or gain muscle.

Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method. Calculate lean body mass and fat mass from measurements. Measure body fat percentage using the US Navy circumference method. Track progress over time with detailed measurements and calculations.

BMR Calculator

Free BMR calculator: Instantly discover calories burned at rest using Mifflin-St Jeor & Harris-Benedict equations. Optimize your nutrition.

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. Estimate the conception date and fertile window based on due date or LMP. Plan pregnancy milestones and track fetal development timeline.

Pregnancy Weight Gain Calculator

Calculate the recommended weight gain during pregnancy based on pre-pregnancy BMI. Get trimester-by-trimester targets. Track healthy pregnancy weight gain by trimester based on IOM guidelines. Understand recommended ranges for different pre-pregnancy BMI categories.

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. Find your correct bra band and cup size using standard measurement methods. Proper fit improves comfort, posture, and breast health.

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. Calculate daily water needs based on body weight, exercise intensity, and climate conditions. Stay properly hydrated for optimal health.

Body Surface Area Calculator

Calculate Body Surface Area (BSA) using Mosteller, DuBois, or Haycock formula. Used in medical dosing and cardiology. Calculate BSA using Mosteller, DuBois, or Haycock formulas. Essential for chemotherapy dosing, burn assessment, and metabolic studies.

Calories Burned Calculator

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