Conversion Of Hours Into Seconds Examples | Definitions, Formula, Conversion Chart & How to Convert Hr to Sec?

Conversion Of Hours Into Seconds: Looking for a perfect guide to make you understand how to convert hrs to sec? then, this is the right page for you. Both Hours and seconds are units used to measure time. Here, we have explained completely about hours to seconds conversion with solved examples. Also, you can have a look at the Math Conversion Chart on our site to get a deeper idea of length, mass, capacity conversions along with the time conversions. Check the below modules and know what are the definitions for Hour and Second, simple conversion formula, and worked-out examples on how to convert hrs to sec.

Definitions for Hours & Seconds

Hour(hr): Hour is defined as a unit of time equal to 1/24 of a day or 60 minutes or 3,600 seconds. An hour is an SI unit of time for use with the metric system. The abbreviation of Hours is ‘hr’. For instance, 1 hour can be addressed as 1 hr. According to the conversion base 1 hour = 3600 seconds.


First, the second was predicated on the length of the day but since 1967, the definition of a Seconds is exactly “the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom” (at a temperature of 0 K). Also, the second is a base unit of time. One second is equal to 0.00027777777777778 hr.

Formula to Hours to Seconds Conversion

The simple formula to convert hours into seconds is as follows:

[number of] hours x 3,600 = [number of] seconds

Sec = Hrs x 3,600

Hours to Seconds Conversion Scale

hours to seconds conversion scale

In order to help you more understandable below, we have compiled a detailed explanation on how to convert Hrs to Sec easily. So, continue your read and learn the simple process of conversion of Hours into Seconds.

How to Convert Hours(hrs) to Seconds(sec)?

To Convert an Hours time measurement to a Seconds time measurement, multiply the time value by the conversion ratio and change the units to time. Let’s speak on the conversion of hr to sec even more deeply by following the lines and know how to convert hours to seconds easily.

As we discussed in the above definitions, One hour is equal to 3600 seconds, so the time in seconds is equal to the hours multiplied by 3,600.

Thus, the formula for Time conversion of Hr into Sec is Seconds = Hours × 3,600.

Once, you know the formula of conversion then substitute the given hours into the hrs to sec formula and calculate the hours to seconds conversion.

Seek help from the below-provided solved examples on Conversion of Hours into Seconds and understand the calculation process involved in converting from hr to sec.

Worked-out Examples on Hours into Seconds Conversion

Example 1:

Convert 3 hours into seconds?


First, consider the given hours in the question ie., Hours = 3hrs

Now, apply the direct formula of hours to seconds conversion:

Seconds = Hours X 3600 sec

Seconds = 3 X 3600 sec

Seconds = 10,800 sec

Therefore, the conversion of hours into seconds for given 3hr = 10,800 sec.

Example 2:

Convert 4 hours 20 minutes into seconds.


First, we have to convert 4hrs into seconds by multiply with the conversion ratio,

ie., Sec = hr x 3600 = 4 x 3600 = 14,400 sec

Next, we have to convert 20 minutes into seconds. As per the definition, 1 minute is equal to 60 seconds.

So, multiple by 60 minutes,

20 x 60 = 1200

Finally, to convert 4 hours 20 minutes into seconds, add them together:

ie., 14,400 + 1200 = 15600

Therefore, the conversion of 4 hours 20 minutes into seconds is 15600 sec. 

Common Conversions Facts About Hrs to Sec

Below are a few easy & quick Hours to Seconds Conversion Facts:

1 minute = 60 seconds
1 hour = 60 minutes
1 hour = 3600 seconds
12 hours = 720 minutes
12 hours = 43,200 seconds
1 day = 24 hours = 1440 minutes
1 day = 24 hours = 86,400 seconds

Hour to Second Conversion Table

Here is the conversion table of Hours(hrs) to Seconds(sec):

Hours Seconds
0.001 hr 3.6 sec
0.002 hr 7.2 sec
0.003 hr 10.8 sec
0.004 hr 14.4 sec
0.005 hr 18 sec
0.006 hr 21.6 sec
0.007 hr 25.2 sec
0.008 hr 28.8 sec
0.009 hr 32.4 sec
0.01 hr 36 sec
0.02 hr 72 sec
0.03 hr 108 sec
0.04 hr 144 sec
0.05 hr 180 sec
0.06 hr 216 sec
0.07 hr 252 sec
0.08 hr 288 sec
0.09 hr 324 sec
0.1 hr 360 sec
0.2 hr 720 sec
0.3 hr 1,080 sec
0.4 hr 1,440 sec
0.5 hr 1,800 sec
0.6 hr 2,160 sec
0.7 hr 2,520 sec
0.8 hr 2,880 sec
0.9 hr 3,240 sec
1 hr 3,600 sec

FAQs on Conversion Of Hours Into Seconds

1. What is the rule for converting hours to seconds?

The time in seconds is equal to the hours multiplied by 3600.

2. How many seconds has 1 hour?

As per the definition, one minute is equal to 60 seconds and 60 minutes in one hour implies that 1 hour = 60 * 60. Now, product it and you’ll get 1 hour has 3,600 seconds.

3. How do you convert Hr to Sec?

As there are 3600 seconds in an hour, to convert hours to seconds, multiply by 3600.

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