# Hours to Seconds Conversion

Enter the time in hours below to get the value converted to seconds.

**Results in Seconds:**

## How to Convert Hours to Seconds

To convert an hour measurement to a second measurement, multiply the time by the conversion ratio.

Since one hour is equal to 3,600 seconds, you can use this simple formula to convert:

The time in seconds is equal to the hours multiplied by 3,600.

**For example,**here's how to convert 5 hours to seconds using the formula above.

### How Many Seconds are in an Hour?

There are **3,600** seconds in an hour, which is why we use this value in the formula above.

1 hr = 3,600 sec

Hours and seconds are both units used to measure time. Keep reading to learn more about each unit of measure.

## Hours

The hour is a period of time equal to 1/24 of a day or 60 minutes.

The hour is an SI accepted unit for time for use with the metric system. Hours can be abbreviated as *hr*; for example, 1 hour can be written as 1 hr.

## Seconds

The second has historically been defined as 1/60 of a minute or 1/86,400 of a day.
According the to SI definition, the second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the unperturbed ground state of the caesium 133 atom.^{[1]}

The second is the SI base unit for time in the metric system. Seconds can be abbreviated as *sec*; for example, 1 second can be written as 1 sec.

## Hour to Second Conversion Table

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 |

## References

- International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf