Health and Fitness

  • Blood Sugar Conversion Calculator
    Convert blood sugar (glucose) between mg/dL and mmol/L instantly. Free two-way blood glucose unit converter using the 18.0182 factor.
  • Body Fat Mass & Fat-Free Mass Calculator
    Calculate your body fat mass and fat-free (lean) mass from your weight and body fat percentage. Fast, free, and works in kg.
  • Days Until Baby Is Born Calculator
    Count down the days until your baby's due date. Enter the estimated due date and today's date to see days, weeks, and months remaining.
  • mEq to mg Calculator
    Convert milliequivalents (mEq) to milligrams (mg) for electrolytes like sodium, potassium, calcium and magnesium using atomic weight and valence.
  • VO2 Max Calculator from Run Time
    Estimate your VO2 max from a 12-minute Cooper run distance or from your max/resting heart rate ratio. Free aerobic fitness calculator.
  • BMR & Daily Calorie Calculator
    Calculate your BMR and daily calorie needs (TDEE) with the accurate Mifflin-St Jeor equation. Get maintain, lose, and gain calorie targets instantly.
  • Target Heart Rate Zone Calculator (Karvonen)
    Calculate your target heart rate training zone using the Karvonen formula based on age, resting heart rate, and exercise intensity percentage.
  • Blood Alcohol Content (BAC) Calculator
    Estimate your blood alcohol content (BAC%) using the Widmark formula from drinks, body weight, gender, and time. Educational estimate — never drive after drinking.
  • Normal Heart Rate by Age Calculator
    Find the normal resting heart rate range (BPM) by age for children and adults, plus tachycardia and bradycardia thresholds. Educational guide only.
  • Body Mass Index (BMI) Calculator
    Calculate your Body Mass Index (BMI) from weight in kilograms and height in centimeters. Instantly see your BMI value and weight category.
  • Corrected Sodium Calculator (Hyperglycemia)
    Calculate corrected serum sodium in hyperglycemia. Adds 1.6 (or 2.4) mEq/L per 100 mg/dL glucose above 100. For clinical education only.
  • Resting Metabolic Rate to Daily Calories (TDEE) Calculator
    Convert your Resting Metabolic Rate (RMR/BMR) into Total Daily Energy Expenditure by multiplying by an activity factor (1.2–1.9). Get maintain, loss, and gain calorie targets.
  • Ounces to Grams Calculator
    Convert ounces (oz) to grams (g) instantly. Enter any weight in ounces and get the precise gram and kilogram equivalent using 1 oz = 28.3495 g.
  • Kilojoules to Calories Calculator
    Convert kilojoules (kJ) to calories (kcal) instantly. Enter an energy value and get food Calories using kcal = kJ ÷ 4.184.
  • mL to Grams Calculator
    Convert milliliters (mL) to grams (g) using density. Free volume-to-weight calculator with presets for water, milk, oil, honey, flour and more.
  • Baby Feeding Amount by Weight Calculator
    Estimate how much formula or milk to feed your baby per day and per feed based on weight, using the standard 150 mL/kg/day guideline.
  • Weeks Pregnant from Conception Date Calculator
    Find out how many weeks pregnant you are based on the conception date. Calculates gestational age in weeks and days from conception to today.
  • Baby Weight Conversion Calculator
    Convert baby weight between pounds & ounces and grams/kilograms instantly. Free two-way birth weight converter using exact conversion factors.
  • How Many Months Pregnant Am I?
    Find out how many months pregnant you are. Enter your last menstrual period (LMP) and today's date to get gestational age in months, weeks and days.
  • Weight Gain Calorie Calculator
    Calculate daily calories needed to gain weight at your target rate using TDEE plus a calorie surplus (Mifflin-St Jeor BMR). Free and easy to use.
  • Ultrasound Due Date Calculator
    Convert your ultrasound gestational age (weeks + days) into an estimated due date (EDD). Enter the scan date and GA to get your pregnancy due date instantly.
  • Basal Body Temperature (BBT) Ovulation Calculator
    Find your ovulation day and fertile window from basal body temperature. Enter your 6-day baseline and thermal shift day to detect ovulation.
  • Body Surface Area (Mosteller) Calculator
    Calculate body surface area (BSA) in m² using the Mosteller formula from your height (cm) and weight (kg). Fast, accurate, and free.
  • Daily Calorie Deficit Weight Loss Calculator
    Estimate how long it takes to lose weight from a daily calorie deficit. Enter kg to lose and your daily kcal deficit to see days, weeks and weekly loss.

Categories