• Sleep Debt Calculator
    Calculate your accumulated sleep debt over any period by comparing ideal sleep to your actual sleep each night. Free, fast, and easy to use.
  • Social Media Time Alternatives Calculator
    See how many hours and days you could reclaim each week, month and year by cutting back on social media — plus the dollar value of that time.
  • Hair Growth Calculator
    Estimate how long it takes to grow your hair to a target length based on your current length and monthly growth rate (~1.25 cm/month average).
  • Standing Desk Height Calculator
    Find your ideal standing desk and monitor height from your body height. Get ergonomic elbow-level desk and eye-level monitor positions in cm or inches.
  • Pomodoro Technique Calculator
    Calculate the total time for your Pomodoro study or work plan, including work sessions, short breaks, and long breaks after every 4th cycle.
  • Quit Smoking and Save Calculator
    Calculate how much money you save by quitting smoking. Enter cigarettes per day, pack size, price and years to see daily, monthly and total savings.
  • Weighted Blanket Calculator
    Calculate the ideal weighted blanket weight from your body weight using the 10% + 1 lb rule, plus an 8–12% acceptable range.
  • Sleep Cycle Calculator
    Enter your wake-up time to see recommended bedtimes and the total hours of sleep for each option, aligned with natural sleep cycles.