Health and Fitness

  • 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.
  • 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.
  • Baby Weight Conversion Calculator
    Convert baby weight between pounds & ounces and grams/kilograms instantly. Free two-way birth weight converter using exact conversion factors.
  • 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.
  • Miles Per Hour Pace Calculator
    Free pace calculator: enter distance and time to get your pace per mile and per kilometer plus speed in mph and km/h. Works for running, walking, cycling.
  • Gestational Age from Ultrasound Calculator
    Calculate estimated due date (EDD) and current gestational age from an ultrasound scan date and the gestational age measured at that scan.
  • 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.
  • Weight for Height Percentile Calculator (Adult)
    Find the healthy weight range for your height using the BMI 18.5–25 standard. Enter height in cm or inches to see your ideal weight in kilograms.
  • Running Calories by Distance Calculator
    Estimate the calories you burn running based on your body weight and the distance you cover. Quick, distance-based running energy expenditure calculator.
  • Resting Heart Rate Fitness Calculator
    Find your fitness level from your resting heart rate. Compares your RHR against standard age and sex norms to rate it Athlete to Poor.
  • Pregnancy Calorie Needs Calculator
    Estimate daily calorie needs during pregnancy. Adds the recommended extra kcal per trimester (0/+340/+450) to your maintenance TDEE.
  • Sober Up Time Calculator
    Estimate how many hours until your blood alcohol concentration (BAC) returns to zero, based on the average metabolism rate of 0.015% per hour.
  • Army BMI Calculator (AR 600-9)
    Calculate your Body Mass Index using the US Army AR 600-9 method. Enter weight in pounds and height in inches for an instant BMI and category.
  • BMI Category Score Calculator
    Calculate your BMI (Body Mass Index) from weight and height in metric units and instantly see your category: underweight, normal, overweight or obese.
  • Pregnancy Trimester End Dates Calculator
    Calculate the start and end dates of each pregnancy trimester and your estimated due date from your last menstrual period (LMP) and cycle length.
  • METs to VO2 Conversion Calculator
    Convert METs to VO2 oxygen consumption instantly. Enter activity intensity in METs to get VO2 in mL/kg/min, plus optional absolute VO2 in L/min.
  • Percentage of 1RM Calculator
    Calculate your working weight as a percentage of your one-rep max (1RM). Enter your 1RM and target percent to get the exact training load plus a full % table.
  • Calories Burned Swimming Calculator
    Estimate calories burned swimming by stroke, body weight and duration using the standard MET formula. Free, instant, and works for any swimmer.
  • Fetal Movement Kick Count Calculator
    Time how long it takes to feel 10 fetal movements. Calculates elapsed minutes, pace per kick, and flags if it exceeds the 2-hour guideline.
  • Calories from Carbs, Protein & Fat Calculator
    Calculate total calories from grams of carbohydrates, protein, fat and alcohol using the 4-4-9-7 kcal-per-gram Atwater factors, with a macro breakdown.
  • Heart Rate from RR Interval Calculator
    Convert an ECG RR interval in milliseconds to heart rate in beats per minute (bpm) instantly using HR = 60000 / RR. Free, fast and accurate.
  • Macros to Calories Calculator
    Convert grams of protein, carbs, fat and alcohol into calories (kcal) instantly. Uses 4/4/9/7 kcal per gram with a full macro breakdown.
  • Fat Grams Per Pound Lost Calculator
    Find out how many calories you must burn to lose a pound of fat. Enter your goal weight loss and timeframe to get the total and daily calorie deficit.

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