Units of Time

Time is defined as the continued progress of existence in past, present, and future. Using the unit of time you can measure the existence of events. The most commonly used units of time are second, minute and hour. Time is an interesting topic and everyone is familiar with it. Want to know about the units of time then go through the following sections. Learn Converting Units of Time such as Hours, Minutes, Seconds from one unit to another by referring through solved examples available.

SI Unit of Time

The SI Unit of Time is Second and is accurately defined as the time interval equal to 9192631770 periods of radiation. Unit second is often represented as s or sec.

Different Units of Time

Some of the common and frequently used time units are minutes, hour, day, week, month, and year. If you want to measure a long duration of time, then you can use a decade which is equal to 10 years, a century which is equal to 100 years, a millennium which is equal to 1000 years, and a mega-annum which is equal to 1,000,000 years. The popular units of time are given below.

The most commonly used Units of Time are

  • Hours
  • Minutes
  • Seconds
1000 milliseconds 1 second
60 seconds 1 minute
60 minutes 1 hour
24 hours 1 day
7 days 1 week
28, 29, 30, or 31 days 1 month
365 or 366 days 1 year
12 months 1 year
10 years 1 decade
100 years 1 century
1000 years 1 millennium

How Time Became So Important?

The top ten reasons why time is so important are mentioned here.

  • Every single thing in the universe is affected by time.
  • Time is the most precious resource because you can’t get it back.
  • Because of privileges, not everyone truly has the same amount of time in a day.
  • No one knows how much time they have.
  • The only time we actually have is the present.
  • How we see time impacts happiness.
  • Managing it poorly or well has a huge impact on life.
  • Skills are impacted by how much time you invest.
  • Relationships are made or broken by how much time you invest.
  • Time is a teacher or a healer.

Also, Read

Time Conversions

To convert 1 unit of time to another, you have to know the units of time. You can use the multiplication or division operations to convert the time.

  • To convert minutes into seconds, you need to multiply each minute by 60 seconds.
  • To convert seconds into minutes, you need to divide each second by 60 minutes.

You can use these parameters for any type of time conversion.

Solved Examples on Converting Units of Time

1. Convert the following

(i) 5 hours 30 minutes into minutes

(ii)90 minutes to seconds


(i) 5 hours 30 minutes into minutes

We know 1 hr = 60 minutes

5 hours = 5*60 minutes

= 300 minutes

5 hrs 30 minutes = 300 minutes +30 minutes

= 330 minutes

Therefore, 5 hours 30 minutes = 330 minutes

(ii)90 minutes to seconds

We know 1 minute = 60 seconds

90 minutes = 90*60 seconds

= 5400 seconds

Therefore, 90 minutes = 5400 seconds

2. Find the total time

5 hours 40 minutes and 3 hours 20 minutes


Firstly add the hours i.e. 5 hours +3 hours

= 8 hours

Now add the minutes individually i.e. 40 minutes +20 minutes

= 60 minutes

= 1 hour

Now, add this to the hours we got in the earlier step i.e. 8 hours +1 hour

= 9 hours

Therefore, 5 hours 40 minutes and 3 hours 20 minutes is equal to 9 hours

Frequently Asked Questions on Units of Time

1. What is the SI unit of time?

The SI unit of time is seconds.

2. What are the 3 possible units of time?

The three most used units of time are seconds, minutes, and hours. 1 minute = 60 seconds, 1 hour = 60 minutes = 3600 seconds.

3. What are the different units of a second?

The various units of a second from the smallest to the largest values are along the lines:
Decisecond (1/10th of a second), centisecond (1/100th of a second), millisecond (1/1000th of a second), microsecond (one-millionth of a second), nanosecond (one-billionth of a second), picosecond (one-trillionth of a second), femtosecond (one-quadrillionth of a second), attosecond (one-quintillionth of a second), zeptosecond (one-sextillionth of a second), yoctosecond (one-septillionth of a second), and Planck time.

4. What is the largest unit of time?

The largest unit of time is the supereon. It is the combination of eons, eras, periods, epochs, and ages.

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