Health and Fitness

  • Macro Percentage of Calories Calculator
    Convert grams of fat, protein and carbs into calories and find the percentage of total calories each macronutrient supplies. Free macro split calculator.
  • Intermittent Fasting Time Calculator
    Calculate when your fast ends and your eating window opens and closes based on your last meal and chosen fasting schedule like 16:8 or 18:6.
  • SOFA Score Calculator
    Calculate the SOFA (Sequential Organ Failure Assessment) score from 6 organ subscores to gauge organ dysfunction and estimate ICU mortality risk.
  • Daily Protein Intake by Body Weight Calculator
    Calculate your daily protein needs in grams based on body weight and goal (0.8–2.2 g/kg). Includes per-meal split and protein calories.
  • Steps to Distance Calculator
    Convert your step count into distance in miles or kilometers. Estimates stride length from your height and gender for an accurate walking distance.
  • Weekly Weight Loss Calculator
    Find the daily calorie deficit needed to lose a set number of pounds per week. Uses the 3,500 calories per pound rule for fast, simple planning.
  • Weeks Pregnant Calculator
    Find out how many weeks pregnant you are today. Calculate gestational age in weeks and days from your last menstrual period (LMP) date.
  • Dog Treat Calorie Limit Calculator
    Find how many treat calories your dog can have per day using the vet 10% rule. Enter weight and activity to get a safe daily treat calorie limit.
  • VO2 Max Calculator (Cooper 12-Minute Run Test)
    Estimate your VO2 max from the Cooper 12-minute run test. Enter the distance you covered in meters to get your aerobic fitness score instantly.
  • Calories in Macros Calculator
    Convert grams of protein, carbohydrates and fat into calories. Calculate total kcal and macro percentage breakdown using the 4-4-9 Atwater factors.
  • Bulking Calorie & Macro Calculator
    Calculate your daily bulking calories and macros (protein, carbs, fat) for muscle gain using your TDEE plus a 250–500 kcal surplus.
  • Marathon Pace Calculator
    Convert your marathon goal finish time into the exact pace per km or mile you need to run. Free pace chart calculator with average speed.
  • Time to Reach Goal Weight Calculator
    Estimate how many weeks it will take to reach your goal weight based on your daily calorie deficit. Uses the 3,500 calories per pound rule.
  • Cups to Grams Calculator
    Convert cups to grams for any ingredient using density. Pick flour, sugar, butter, water and more, or enter a custom g/mL value. Free and instant.
  • 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.
  • 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.
  • 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.
  • Heart Rate Reserve Calculator (HRR)
    Calculate your Heart Rate Reserve (HRR) from max and resting heart rate, plus target training zones using the Karvonen formula.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Calories Burned per Pound of Fat 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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