Wellness and Mindfulness

  • Melatonin Onset Timing Calculator
    Find out exactly when to take melatonin before bed. Enter your target sleep time and onset lag (30–60 min) to get the ideal dose time.
  • Sleep Need Calculator
    Estimate how many hours of sleep you need tonight based on your age, recent sleep debt, and activity level. Free, instant sleep need calculator.
  • Smoking Pack-Years Calculator
    Calculate your smoking pack-years from cigarettes per day and years smoked. A simple measure of lifetime tobacco exposure used in health screening.
  • Hours of Sleep Calculator
    Find out how much sleep you'll get tonight. Enter your bedtime and wake time to calculate total sleep hours, minutes, and 90-minute sleep cycles.
  • Daily Calorie Deficit Weight Loss Calculator
    Estimate how long it takes to lose weight from a daily calorie deficit. Enter kg to lose and your daily kcal deficit to see days, weeks and weekly loss.
  • Macronutrient Split Calculator
    Convert your daily calories and macro percentages into grams of protein, carbs, and fat per day. Free macronutrient split calculator.
  • 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.
  • Naps Needed Calculator
    Estimate how many naps per day are needed from total daytime sleep hours and average nap length. Free, instant nap schedule calculator for babies and adults.
  • Average Sleep Per Night Calculator
    Calculate your average sleep per night from a week of nightly hours. Enter each night's sleep to find your weekly mean and total sleep instantly.
  • Time to Metabolize Alcohol Calculator
    Estimate how many hours it takes to metabolize alcohol from your current BAC, using the average elimination rate of 0.015% per hour.
  • Ideal Bedtime by Age Calculator
    Find your child's ideal bedtime by age. Enter wake-up time and age to get a recommended bedtime based on healthy sleep guidelines for kids.
  • 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.
  • Multiple Wake-Up Time Options Calculator
    Enter your bedtime to find the best wake-up times based on 90-minute sleep cycles — 4.5, 6, 7.5 and 9 hours of sleep so you wake refreshed.
  • 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.
  • Bedtime Calculator
    Find the best time to go to bed for your wake-up time. Calculates bedtimes based on 90-minute sleep cycles plus time to fall asleep.
  • Alarm Time Calculator
    Find what time to set your alarm. Add bedtime, time to fall asleep, and desired sleep hours to get your exact 24-hour wake-up time.
  • Insomnia Severity Index (ISI) Calculator
    Calculate your Insomnia Severity Index (ISI) score by summing 7 items (0–4 each, range 0–28) and get the standard severity interpretation.
  • Pittsburgh Sleep Quality Index (PSQI) Calculator
    Calculate your global Pittsburgh Sleep Quality Index (PSQI) by summing 7 component scores (0-3 each) for a 0-21 total. Scores above 5 suggest poor sleep.
  • Sleep Apnea AHI Calculator
    Calculate your Apnea-Hypopnea Index (AHI) from apneas, hypopneas, and sleep time, and see the sleep apnea severity category (normal, mild, moderate, severe).
  • Screen Time Reduction Savings Calculator
    Calculate how many hours you reclaim per year by cutting daily screen time. See your digital detox savings in hours, days, and weeks instantly.
  • Recommended Sleep Hours by Age Calculator
    Find recommended sleep hours for your age and the ideal bedtime based on your wake-up time, using National Sleep Foundation age bands.
  • Daily Caffeine Intake Calculator
    Add up caffeine from coffee, espresso, tea, energy drinks and soda. See your total mg per day and how it compares to the 400 mg safe limit.
  • Perceived Stress Scale (PSS-10) Calculator
    Score the 10-item Perceived Stress Scale (PSS-10) instantly. Auto reverse-scores items 4, 5, 7, 8 and classifies your stress as low, moderate, or high.
  • Standard Drinks Calculator (US)
    Calculate US standard drinks from any beverage's volume and ABV. One US standard drink contains 0.6 fl oz of pure alcohol. Free and instant.

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