Health and Fitness

  • 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.
  • 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.
  • 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.
  • Beck Depression Inventory (BDI-II) 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.
  • 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).
  • 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.
  • Mean Arterial Pressure (MAP) Calculator
    Calculate Mean Arterial Pressure (MAP) from systolic and diastolic blood pressure. MAP = DBP + (SBP − DBP)/3. Instant mmHg result and pulse pressure.
  • 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.
  • Calories Burned Per Step Calculator
    Estimate calories burned walking by step count, body weight and stride length. See total kcal, calories per step and distance walked.
  • Calories Burned Running Calculator (by Speed)
    Estimate calories burned running by speed (mph), body weight and duration using MET values. Fast, free running calorie calculator for any pace.
  • Dog Ideal Weight Calculator
    Estimate your dog's ideal body weight from its current weight and Body Condition Score (1-9). See how much weight to lose or gain for a healthy target.
  • Cat Food Calculator
    Calculate how much to feed your cat each day in grams based on weight, life stage and food calorie density using the vet RER/DER energy formula.
  • Pounds Lost from Calorie Deficit Calculator
    Estimate how many pounds of fat you'll lose from a calorie deficit. Uses the 3,500 kcal-per-pound rule based on your daily deficit and days.

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