Health and Fitness

  • Modified Sgarbossa Criteria Calculator
    Calculate RMSSD heart rate variability from RR intervals. Also returns SDNN, mean RR interval and average heart rate from your beat-to-beat data.
  • TDEE to BMI Goal Weight Calculator
    Find your target body weight for any goal BMI. Enter your height and desired BMI to instantly calculate the weight (kg) you need to reach.
  • Grams of Protein Per Meal Calculator
    Convert grams of protein, carbohydrates and fat into calories. Calculate total kcal and macro percentage breakdown using the 4-4-9 Atwater factors.
  • 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.
  • Waist Circumference Percentile Calculator
    Check your abdominal-obesity health risk from waist circumference. Men >102cm/40in and women >88cm/35in flag high risk. Free, instant, cm or inches.
  • 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.
  • Creatinine Clearance (IBW) Calculator
    Estimate creatinine clearance (CrCl) with the Cockcroft-Gault equation using age, weight, sex, and serum creatinine. Result in mL/min for renal dosing.
  • Epley 1RM Calculator
    Estimate your one-rep max (1RM) for bench press or any lift using the Epley and Brzycki formulas. Enter weight and reps to get instant results.
  • Mindful Walking Step Goal Calculator
    Track your daily step goal progress. Enter steps taken and your goal to see your completion percentage and steps remaining instantly.
  • Deep Breathing Heart Rate Zone Calculator
    Find your relaxation heart rate zone for deep breathing. Enter your age to get max heart rate and the calming 50–60% target range in bpm.
  • 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.
  • 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.
  • Calorie Calculator
    Enter age, gender, height, weight, and activity to get daily calories. See your BMR, maintenance, and targets for weight loss or gain. Metric/imperial.
  • Due Date Calculator
    Calculate your due date accurately with this due date calculator. Input your last period and cycle length to determine your expected delivery date. Plan for your baby's arrival with precision.
  • 1RM Calculator
    Calculate your One-Rep Max (1RM) with precision. Input weight lifted and repetitions performed to determine your maximum strength for any exercise. Enhance your training and track progress effectively.
  • QTc Calculator (Corrected QT Interval)
    Calculate the corrected QT interval (QTc) from QT and heart rate using the Bazett, Fridericia, Framingham, or Hodges correction formulas.
  • Rate Pressure Product Calculator
    Calculate Rate Pressure Product (RPP) instantly: multiply heart rate by systolic blood pressure to estimate myocardial oxygen demand and cardiac workload.
  • Gestation Calculator
    Estimate the due date by adding a gestation period (in days) to the conception date. Works for humans and animals with custom gestation lengths.
  • Target Heart Rate Zone Calculator
    Find your maximum heart rate and 5 exercise target heart rate zones in bpm using the Basic (%MHR) or Karvonen heart rate reserve method.
  • Running VO2 Max Calculator
    Estimate your VO2 max from a race result using the Daniels & Gilbert VDOT formula. Enter distance and finish time to get oxygen uptake in mL/kg/min.
  • Dog Pregnancy Week Calculator
    Find out what week of pregnancy your dog is in. Enter the breeding date and today's date to track gestation stage out of 9 weeks (≈63 days).
  • Maintenance Calories Calculator
    Calculate your maintenance calories (TDEE) from BMR and activity level using the Mifflin-St Jeor equation. See loss and gain targets too.
  • Daily Calorie Intake by Goal Calculator
    Calculate your daily calorie intake for cutting, maintaining, or bulking based on BMR, TDEE, and activity level using the Mifflin-St Jeor equation.
  • Blood Alcohol Content (BAC) Calculator
    Estimate your blood alcohol content (BAC) with the Widmark formula from drinks, body weight, gender and time. Educational estimate only — never use to decide to drive.

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