## How to Convert Days to Seconds

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

Since one day is equal to 86,400 seconds, you can use this simple formula to convert:

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### How Many Seconds are in a Day?

There are **86,400** seconds in a day, which is why we use this value in the formula above.

1 day = 86,400 sec

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

## Days

One day is the time it takes for the Earth to complete a single rotation around its axis in relation to the Sun. There are 24 hours in a day.

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

## 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.

## Day to Second Conversion Table

Day measurements converted to seconds Days Seconds0.0001 day | 8.64 sec |

0.0002 day | 17.28 sec |

0.0003 day | 25.92 sec |

0.0004 day | 34.56 sec |

0.0005 day | 43.2 sec |

0.0006 day | 51.84 sec |

0.0007 day | 60.48 sec |

0.0008 day | 69.12 sec |

0.0009 day | 77.76 sec |

0.001 day | 86.4 sec |

0.002 day | 172.8 sec |

0.003 day | 259.2 sec |

0.004 day | 345.6 sec |

0.005 day | 432 sec |

0.006 day | 518.4 sec |

0.007 day | 604.8 sec |

0.008 day | 691.2 sec |

0.009 day | 777.6 sec |

0.01 day | 864 sec |

0.02 day | 1,728 sec |

0.03 day | 2,592 sec |

0.04 day | 3,456 sec |

0.05 day | 4,320 sec |

0.06 day | 5,184 sec |

0.07 day | 6,048 sec |

0.08 day | 6,912 sec |

0.09 day | 7,776 sec |

0.1 day | 8,640 sec |

0.2 day | 17,280 sec |

0.3 day | 25,920 sec |

0.4 day | 34,560 sec |

0.5 day | 43,200 sec |

0.6 day | 51,840 sec |

0.7 day | 60,480 sec |

0.8 day | 69,120 sec |

0.9 day | 77,760 sec |

1 day | 86,400 sec |

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