## Conversion formula

The conversion factor from hours to seconds is 3600, which means that 1 hour is equal to 3600 seconds:

1 hr = 3600 s

To convert 4.2 hours into seconds we have to multiply 4.2 by the conversion factor in order to get the time amount from hours to seconds. We can also form a simple proportion to calculate the result:

1 hr → 3600 s

4.2 hr → T(s)

Solve the above proportion to obtain the time T in seconds:

T(s) = 4.2 hr × 3600 s

T(s) = 15120 s

The final result is:

4.2 hr → 15120 s

We conclude that 4.2 hours is equivalent to 15120 seconds:

4.2 hours = 15120 seconds

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 second is equal to 6.6137566137566E-5 × 4.2 hours.

Another way is saying that 4.2 hours is equal to 1 ÷ 6.6137566137566E-5 seconds.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that four point two hours is approximately fifteen thousand one hundred twenty seconds:

4.2 hr ≅ 15120 s

An alternative is also that one second is approximately zero times four point two hours.

## Conversion table

### hours to seconds chart

For quick reference purposes, below is the conversion table you can use to convert from hours to seconds

hours (hr) seconds (s)
5.2 hours 18720 seconds
6.2 hours 22320 seconds
7.2 hours 25920 seconds
8.2 hours 29520 seconds
9.2 hours 33120 seconds
10.2 hours 36720 seconds
11.2 hours 40320 seconds
12.2 hours 43920 seconds
13.2 hours 47520 seconds
14.2 hours 51120 seconds