Health and Fitness

  • Daily Water Intake by Body Weight Calculator
    Calculate how much water you should drink daily based on your body weight in pounds or kilograms, plus your activity level. Get ounces, ml, liters and cups.
  • Calories Burned by Steps Calculator
    Estimate calories burned from your step count, body weight and height. Free calculator using stride length and distance to give kcal burned walking.
  • Steps to Calories Calculator
    Convert daily steps into calories burned. Enter steps, body weight and stride length to estimate kcal and distance walked instantly.
  • Fat Mass to Lose for Goal Body Fat % Calculator
    Find how many kg of fat you need to lose to hit a target body fat percentage, assuming lean mass stays constant. Free, instant results.
  • Calories to Kilojoules Converter
    Convert calories (kcal) to kilojoules (kJ) and back instantly. Uses the exact factor 1 kcal = 4.184 kJ for accurate energy conversions.
  • Daily Protein Intake Calculator
    Calculate your daily protein needs in grams from body weight and activity level (0.8–2.2 g/kg). Free, instant protein intake calculator.
  • Goal Weight from Body Fat % Calculator
    Calculate your target weight from a goal body fat percentage. Enter current weight, current and target body fat % to find lean mass and goal weight.
  • Daily Sugar Limit Calculator (WHO/AHA)
    Find your daily added/free sugar limit in grams using WHO (10% and 5% of calories) and AHA (36g men, 25g women) guidelines.
  • Treadmill Pace & Incline Calculator
    Convert treadmill speed (mph) to running pace per mile and find the incline-equivalent flat pace using the ACSM VO2 running equation.
  • Odds Ratio Calculator
    Score the 21-item Beck Depression Inventory (BDI-II). Add each item (0-3) for a total of 0-63 and see your severity band: minimal, mild, moderate or severe.
  • MMSE Calculator (Mini-Mental State Examination)
    Free Mini-Mental State Examination (MMSE) calculator. Add up the 7 domain scores to a total out of 30 and see normal, mild or severe impairment categories.
  • BMR Calculator (Mifflin-St Jeor)
    Calculate your Basal Metabolic Rate with the Mifflin-St Jeor equation. Enter weight, height, age and gender to find daily resting calories and TDEE.
  • Katch-McArdle BMR Calculator
    Calculate your Basal Metabolic Rate with the Katch-McArdle formula using body weight and body fat percentage for a lean-mass based estimate.
  • Cooper 12-Minute Run VO2 Max Calculator
    Estimate your VO2 max from the Cooper 12-minute run test. Enter distance in meters to calculate aerobic fitness instantly with the Cooper formula.
  • Fractional Excretion of Sodium (FENa) Calculator
    Calculate the Fractional Excretion of Sodium (FENa%) from urine and plasma sodium and creatinine to help differentiate prerenal from intrinsic acute kidney injury.
  • Macro Calculator
    Free macro calculator: convert your daily calories and macro split (%) into grams of protein, carbs, and fat per day using 4/4/9 kcal-per-gram.
  • Weekly Calorie Deficit Calculator
    Calculate your daily and weekly calorie deficit and see your estimated weekly weight loss in kg and pounds. Free, instant weight-loss pace tool.
  • Ovulation Date Calculator
    Estimate your ovulation day and fertile window from the first day of your last period and your average cycle length. Free, fast, and easy to use.
  • Running Calories Burned Calculator
    Estimate calories burned while running using the MET formula. Enter your weight, pace and duration to get kcal burned and calories per minute.
  • Cat Calories per Can to Cans per Day Calculator
    Calculate how many cans of wet food your cat needs per day. Enter daily calorie needs and kcal per can to get cans per day and per week.
  • Macronutrient Split Calculator
    Convert your daily calories and macro percentages into grams of protein, carbs, and fat per day. Free macronutrient split calculator.
  • Dog Calories per Cup to Cups per Day Calculator
    Convert your dog's daily calorie needs (MER in kcal) to cups of food per day using the kcal-per-cup density on the bag. Free, instant feeding portion tool.
  • Katch-McArdle BMR Calculator
    Estimate your basal metabolic rate with the Katch-McArdle formula based on lean body mass. Enter weight and body fat % to get daily resting calories.
  • Maximum Heart Rate Calculator (220 - Age)
    Estimate your maximum heart rate with the simple Fox formula (220 - age) and see your 50%-85% target training zones in bpm.

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