Health and Fitness

  • PHQ-9 Depression Score Calculator
    Calculate your PHQ-9 depression screening score (0–27) from the 9 standard items and see the matching severity band, from minimal to severe.
  • Gleason Score & Grade Group Calculator
    Calculate the prostate cancer Gleason score from primary and secondary patterns and convert it to the ISUP/WHO Grade Group (1–5).
  • 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.
  • Pregnancy Caffeine Limit Calculator
    Add up coffee, tea, soda, energy drinks and chocolate to see how much caffeine you've had and how much is left under the 200 mg/day pregnancy limit.
  • Baby Weight-for-Age Percentile Calculator
    Find your baby's weight-for-age percentile (0–24 months) using WHO growth standards. Enter sex, age, and weight to get z-score and percentile.
  • Infant Length/Height-for-Age Percentile Calculator
    Estimate your baby's length or height-for-age percentile (0-24 months) using WHO growth standards, a z-score and the normal distribution.
  • 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.
  • Steps to Calories Calculator
    Convert daily steps into calories burned. Enter steps, body weight and stride length to estimate kcal and distance walked instantly.
  • Target Weight for BMI Calculator
    Find the body weight needed to reach a target BMI. Enter your height, current weight and goal BMI to see your target weight and how much to lose or gain.
  • 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.
  • Running Pace Calculator
    Enter distance and finish time to calculate running pace per kilometer and per mile, plus speed in km/h and mph—plan training and race goals.
  • Crude Protein Calculator
    Calculate crude protein percentage from nitrogen content using the Kjeldahl conversion factor (default 6.25). Free, fast feed and food analysis tool.
  • Cost of Having a Baby Calculator
    Estimate the total cost of having a baby — medical bills, one-time gear, nursery and recurring monthly expenses — with this free first-year baby cost calculator.
  • Cigarette Cost Calculator
    Find out how much smoking really costs you. Calculate your daily, weekly, monthly and yearly cigarette spending based on packs, price and habit.
  • 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.
  • 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.
  • Weight Change Predictor Calculator
    Predict your weekly weight change from daily calorie intake vs TDEE. Estimate gain or loss in pounds and kg using the 3,500 kcal-per-pound rule.
  • Dog Heart Rate Calculator
    Calculate your dog's heart rate from beats counted in 15 seconds and check it against the normal bpm range for small, medium, or large dogs.
  • Puppy Food Calculator
    Calculate how much to feed your puppy each day based on weight, age, and food calories. Uses the RER energy formula for healthy growth.
  • Chicken Egg Incubation & Hatch Date Calculator
    Calculate the hatch date for chicken eggs (21 days) and other poultry. Enter the set date and species to get your hatch day and lockdown date.
  • Body Fat Percentage Calculator (BMI Method)
    Estimate body fat percentage from your BMI, age and sex using the Deurenberg equation. Free calculator with fat mass and lean mass output.
  • Horse Feed Calculator
    Calculate how much hay and grain to feed your horse each day based on body weight, using the standard 2% of body weight forage rule.

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