Health and Fitness

  • Calories Burned Running Calculator
    Estimate calories burned running by distance and body weight. Free running calorie calculator using kcal = 0.75 × kg × km (≈ 0.53 × lb × miles).
  • Calorie Surplus Calculator for Weight Gain
    Calculate the daily calorie surplus and target intake needed to gain weight by a target date. Free weight-gain calorie calculator with worked example.
  • Bench Press / Lift Percentage Calculator
    Calculate your working weight for bench press, squat or any lift as a percentage of your one-rep max (1RM). Fast % of 1RM training weight tool.
  • Non-HDL Cholesterol Calculator
    Calculate your non-HDL cholesterol by subtracting HDL from total cholesterol (mg/dL). Includes risk category interpretation. Educational use only.
  • Weight Converter (kg ↔ lb ↔ stone)
    Convert weight between kilograms, pounds and stone instantly. Enter a value and unit to get accurate kg, lb and stone equivalents.
  • HbA1c to Average Glucose Calculator
    Convert HbA1c (%) to estimated average glucose (eAG) in mg/dL and mmol/L using the ADAG formula. Fast, free diabetes conversion tool.
  • Pulse Pressure Calculator
    Calculate pulse pressure from your blood pressure: Pulse Pressure = Systolic − Diastolic. See if your value is low, normal, or high, plus estimated MAP.
  • 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.
  • Max Heart Rate Calculator (Tanaka Formula)
    Estimate your maximum heart rate from age using the Tanaka formula (208 − 0.7 × age). Get bpm plus moderate and vigorous training heart-rate zones.
  • VO2 Max from Resting Heart Rate Calculator
    Estimate your VO2 max from resting heart rate and age using the Uth-Sørensen formula. Free, instant cardiovascular fitness calculator.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Alcohol By Volume (ABV) Calculator
    Calculate the alcohol by volume (ABV%) of beer, wine, or mead from original and final gravity readings using the standard ABV = (OG − FG) × 131.25 formula.
  • 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.
  • Kilojoules to Calories Calculator
    Convert kilojoules (kJ) to calories (kcal) instantly. Enter an energy value and get food Calories using kcal = kJ ÷ 4.184.
  • 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.
  • 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.

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