Welcome to OnlineConversion.com

Date and Time Related Conversions/Calculators


  • TimeZone Find out what time it is in different areas around the world.
  • 12 hour to 24 hour Convert to and from the 12 hour time format and the 24 hour military time format.
  • Basic Time Clock Calculate how many hours you work each week using this simple online calculator.
  • Old Enough Determine what a persons birthday must be in order to be a certain age today.
  • Lead Time Add a certain amount of days, weeks, months, and years to a date, and calculate the new date.
  • Day Number, Week Number, Day of Week Calculate the Day number (day of the year), week number, and the day of the week for a given date.
  • Date/Time Difference Calculate the number of days, hours, minutes, and seconds between two dates and times.
  • Date Difference Calculate the number of days between two dates.
  • Julian Date Convert calendar date and time to Julian date and vice versa.
  • Calendar Creator Choose a year and a month and the calendar will be displayed.
  • Unix Time Convert Unix time into a readable date.
  • Time Conversion Convert between Seconds, Minutes, Hours, Days, Weeks, Months, Years, More...
  • Time Calculator Add or Subtract hours and minutes.
  • Advanced Time Calculator Like the above, but also allows you to convert many minutes or seconds into the HH:MM:SS format. It also may be easier to use.

See Also:

  • Chinese Zodiac Determine which Chinese Zodiac symbol you were born under.
  • Retire Date Determine how many day until you can retire.
  • Group Work Calculate how long for two people to complete a task
  • Lap Time Calculates the average lap time required to finish a race in the time you enter
  • Leap Year Determine if a year is a leap year.
  • Radiation How much radioactive material remains after a given time.
  • Your Age How old you are down to the second, how many seconds old you are, and how long until your next birthday
  • Day Born Find out what day of the week you were born
  • Running Calculate your time, distance covered, or pace.
  • Dog Years How old are you in Dog Years?

BookMark Us

It may come in handy.

Are you bored?

Try the Fun Stuff

Was this site helpful?

Link to Us | Donate