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Age Calculator

Calculate the age in years, months, days, hours, or seconds


The age should be expressed in:

Calculation of Age

An age can be expressed in various units of time, such as seconds, minutes, hours, days, weeks, months, and years. Each of these units provides a different way to understand how much time has passed since a particular event, such as a person's birth or the founding of a company.

Time units and their relationships

A year is the most common unit in which we express age. This is because a year corresponds to one full revolution of the Earth around the sun. In our daily lives, however, years are broken down into smaller units to better measure and manage time.

Relationships between time units

Here is a table showing these different time units and their relationships:

Unit of Time Equivalent in other units
1 year
  • ~12 months
  • ~52.143 weeks
  • ~365.25 days
  • ~8,766 hours
  • ~525,960 minutes
  • ~31,557,600 seconds
1 month
  • ~4.345 weeks
  • ~30.44 days
  • ~730.44 hours
  • ~43,830 minutes
  • ~2,629,800 seconds
1 week
  • 7 days
  • 168 hours
  • 10,080 minutes
  • 604,800 seconds
1 day
  • 24 hours
  • 1,440 minutes
  • 86,400 seconds
1 hour
  • 60 minutes
  • 3,600 seconds
1 minute
  • 60 seconds

Leap Years: a solution to an astronomical problem

Leap years are particularly interesting because they provide a solution to an intriguing astronomical problem. As mentioned earlier, a full revolution of the Earth around the sun takes slightly more than 365 days - about 365.2422 days to be precise. To correct this difference, an extra day (February 29) is added to the year every four years. These years are called leap years.

Historical origin of leap years

The concept of the leap year dates back to the time of Julius Caesar in Roman times when the Julian calendar was introduced. However, this system was not perfect and introduced a slight error, which was later corrected with the introduction of the Gregorian calendar in 1582.

In conclusion, the calculation of age in different units of time is a fascinating subject that helps us better understand our perception and measurement of time.

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