Years to Seconds Conversion

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

Results in Seconds:
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1 yr = 31,556,952 sec
Do you want to convert seconds to years?

How to Convert Years to Seconds

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

Since one year is equal to 31,556,952 seconds, you can use this simple formula to convert:

seconds = years × 31,556,952

The time in seconds is equal to the years multiplied by 31,556,952.

For example, here's how to convert 5 years to seconds using the formula above.
5 yr = (5 × 31,556,952) = 157,784,760 sec
conversion scale showing years and equivalent seconds time values

How Many Seconds Are in a Year?

There are 31,556,952 seconds in a year, which is why we use this value in the formula above.

1 yr = 31,556,952 sec

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


One year is the time it takes for the Earth to complete its orbit around the Sun. There are 365 days in a year, with the exception of the leap year when there are 366.

Years can be abbreviated as yr, and are also sometimes abbreviated as y. For example, 1 year can be written as 1 yr or 1 y.


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.

Year to Second Conversion Table

Year measurements converted to seconds
Years Seconds
0.0000001 yr 3.1557 sec
0.0000002 yr 6.3114 sec
0.0000003 yr 9.4671 sec
0.0000004 yr 12.62 sec
0.0000005 yr 15.78 sec
0.0000006 yr 18.93 sec
0.0000007 yr 22.09 sec
0.0000008 yr 25.25 sec
0.0000009 yr 28.4 sec
0.00000001 yr 0.31557 sec
0.0000001 yr 3.1557 sec
0.000001 yr 31.56 sec
0.00001 yr 315.57 sec
0.0001 yr 3,156 sec
0.001 yr 31,557 sec
0.01 yr 315,570 sec
0.1 yr 3,155,695 sec
1 yr 31,556,952 sec


  1. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019,

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