Time Conversion

Round:
Second
Minute
Hour
Day
Week
Month
Year
Decade
Century

Time Units

The time units in this calculator tool are second, minute, hour, day, week, month, year, decade and century. The base unit of time in the metric system is the second.

What is a Year?

A year is the time it takes the Earth to orbit around the Sun. The year time unit in this calculator tool is based on the modern (Gregorian) calendar common year which is 365 days. The leap year in Gregorian calendar is 366 days and the average length of the calendar year (the mean year) across the complete leap cycle of 400 years is 365.2425 days.

Here is the definition and more information about year.

The breakdown from year to other time units:

1 Year =

  • 31540000 seconds
  • 525600 minutes
  • 8760 hours
  • 365 days
  • 52.1429 weeks
  • 12 months
  • 0.1 decade
  • 0.01 century

What is a Month?

A month is the time it takes the Moon to orbit around the Earth which is about 29.5 days (lunar cycle). There are 12 lunar cycles in a year. The month time unit in this calculator tool is based on the modern (Gregorian) calendar month which is 30.4167 days (365 / 12).

Here is the definition and more information about month.

The breakdown from month to other time units:

1 Month =

  • 2628000 seconds
  • 43800 minutes
  • 730.001 hours
  • 30.4167 days
  • 4.34524 weeks
  • 0.083333 year
  • 0.00833 decade
  • 0.0008333 century

What is a Day?

A day is the time it takes the Earth to rotate around its axis and defined as 86400 seconds and symbolized as "d".

The breakdown from day to other time units:

1 Day =

  • 86400 seconds
  • 1440 minutes
  • 24 hours
  • 0.142857 week
  • 0.032877 month
  • 0.0027397 year