How many second in 1 year?
The answer is 31536000.

We assume you are converting between **second** and **year**.

You can view more details on each measurement unit:

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year

The SI base unit for **time** is the second.

1 second is equal to 3.17097919838E-8 year.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between seconds and years.

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The second (symbol s) is a unit for time, and one of seven SI base units. It is defined as 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 zero kelvins.

A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. By extension, this can be applied to any planet: for example, a "Martian year" is a year on Mars.

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