
What is the base unit?
A base unit is a unit defined upon its own terms on which other units are based. Units of time measure how long something persists. Let us understand this by an example: how many seconds can you hold the weight, or how many minutes are left for the movie to end?

What is a second?
Second is the base unit of time, and it is a short amount of time base but not the smallest. For example, it would just take a second to turn on the light or open a drawer. A second is the standard time measurement unit that is recognized and used by the International System of units. A second equals 1/60th of a minute or 1/3600 of an hour.

What is an hour?
It is a standard time measurement unit that equals 60 minutes. It is used and recognized by Si, and its symbol is h. The concept of using an hour began in 13 the century when the scientists in Ancient Greece thought of dividing a solar system day into 20 equal parts. Hour is also used for defining numerous related measurement units such as kilometres per hour, kilowatthour, etc.

Converting hours to seconds
You might not need to convert hours to seconds daily, but you might require various calculation or exam for scientific or industrial purposes. There are different online time calculators which can help you do them quickly, but it is also essential for you to know how to do it manually.

How many seconds are there in an hour?
Remembering this is vital as all the other hour and second based calculations depend on it.
No. of minutes in 1 hour – 60 minutes
No. of seconds in 1 minute – 60 seconds
Hence, the number of seconds in an hour 60*60 = 3600 seconds 
How to calculate hours to seconds?
Calculating the larger units into smaller units is really easy and straightforward. The formula is simple, and you would remember it when you need to do the conversion next time
1 minute = 60 seconds and 1 hour = 60 minutes.
Now, for converting hours into seconds, you multiple the larger units by 60.
For example, when you convert hours into minutes:
1 hours = 60 minutes
2 hours = 2*60 = 120 minutes
120 minutes = 120*3600 seconds= 7200 seconds 
How to calculate seconds to minutes?
Many people face a challenge while converting from seconds to minutes or hour, but it’s a straightforward job. You require to divide the number of smaller units by 60.
As, 1 second = 1/60 minute and 1 minute = 1/60 hour
Now, when how will you convert seconds into minutes?
1 second = 1/60 minute, thus
60 seconds = 60/60 minute, which makes it 1 minute. 
Hours to second conversion table
For making things easy to understand, here is the conversion table for you:
Hours Seconds 1 Hour 3600 Seconds 2 Hours 7200 Seconds 3 Hours 10800 Seconds 4 Hours 14400 Seconds 5 Hours 18000 Seconds 6 Hours 21600 Seconds 7 Hours 25200 Seconds 8 Hours 28800 Seconds 9 Hours 32400 Seconds 10 Hours 36000 Seconds 11 Hours 39600 Seconds 12 Hours 43200 Seconds 13 Hours 46800 Seconds 14 Hours 50400 Seconds 15 Hours 54000 Seconds 16 Hours 57600 Seconds 17 Hours 61200 Seconds 18 Hours 64800 Seconds 19 Hours 68400 Seconds 20 Hours 72000 Seconds 21 Hours 75600 Seconds 22 Hours 79200 Seconds 23 Hours 82800 Seconds 24 Hours 86400 Seconds