Duration Calculator

  • Time Difference Calculator
    Calculate the difference between two times in hours, minutes, and seconds. Enter a start and end time to get the exact elapsed duration instantly.
  • Week Calculator
    Free week calculator to find how many weeks and days are between two dates. Get total weeks, days, and the exact week count fast.
  • Audiobook Speed Calculator
    Calculate how long an audiobook takes at 1.25x, 1.5x, 2x or any speed. See your adjusted listening time and how much time you save.
  • Reading Time Calculator
    Estimate how long a text takes to read. Enter word count and reading speed (WPM) to get reading time in minutes and seconds instantly.
  • Expiration Date Calculator
    Find a product's expiration date by adding its shelf life in days to the manufacture date. Get the exact expiry date and days remaining instantly.
  • Every Second Calculator
    Count every second between two date-times. Enter a start and end date and time to get the exact total seconds, minutes, hours and days.
  • Minutes Between Two Times Calculator
    Calculate the exact number of minutes between two times of day. Handles overnight spans automatically and shows the result in hours and minutes too.
  • Months Between Two Dates Calculator
    Find how many months are between two dates. Enter a start and end date to get the total months including a fractional part based on days.
  • Time Adder Calculator
    Add multiple time durations together. Enter hours, minutes and seconds for up to three entries and get the total in normalized h:m:s format.
  • Working Days Calculator
    Count the number of working (business) days between two dates, excluding Saturdays and Sundays. Inclusive of both start and end dates.
  • Time to Hours Calculator
    Convert hours, minutes and seconds into decimal hours instantly. Free time-to-hours calculator with total minutes and seconds breakdown.
  • Years Between Two Dates Calculator
    Calculate the number of years between two dates instantly. Enter a start and end date to get the exact years and total days elapsed.
  • Clock Duration Calculator
    Calculate the elapsed time between two clock times. Get hours, minutes, total minutes, and decimal hours — handles overnight spans past midnight.
  • Count Hours Calculator
    Count the hours between a start and end time, subtract breaks, and get the result in decimal hours and hours-and-minutes. Free, fast, and easy.
  • Elapsed Time Calculator
    Calculate the elapsed time between two dates and times. Get the result in days, hours, minutes and seconds, plus totals for each unit.
  • Hours to Decimal Calculator
    Convert hours, minutes and seconds to decimal hours instantly. Perfect for payroll and timesheets using decimal_hours = h + m/60 + s/3600.
  • Ideal Egg Boiling Calculator
    Find the perfect egg boiling time for soft, medium, or hard eggs. Adjusts for egg size and altitude so your boiled eggs come out just right.
  • Turkey Thawing Calculator
    Calculate how long to thaw a turkey by weight using the refrigerator or cold water method. Plan Thanksgiving safely with estimated thaw times.
  • Medicine 3 Times a Day Calculator
    Calculate when to take medicine 3 times a day. Enter your waking hours and dose count to get evenly spaced dose times and the hours between each dose.
  • Sobriety Calculator
    Count your days sober from your start date and see weeks, years, and the money you've saved by quitting. Free, instant sobriety tracker.
  • Deadline Calculator
    Calculate a project deadline by adding a number of days to a start date. Choose calendar days or skip weekends, and see how many days remain until the due date.
  • Time Unit Conversion Calculator
    Convert any time value across 16 units at once: Planck time, atomic units, nanoseconds, seconds, minutes, hours, days, weeks, months and years.
  • Elapsed Time Between Two Times Calculator
    Calculate the elapsed time between a start time and an end time. Get the duration as H:MM:SS and totaled in hours, minutes, and seconds, with overnight rollover.
  • Days Old Calculator
    Find out exactly how many days old you are. Enter your birth date and an end date to get total days, weeks, and hours between two dates.

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