Seconds to Years Conversion

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

Results in Years:
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1 sec = 3.1689E-8 yr
Hint: use a scientific notation calculator to convert E notation to decimal
Do you want to convert years to seconds?

How to Convert Seconds to Years

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

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

years = seconds ÷ 31,556,952

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

For example, here's how to convert 50,000,000 seconds to years using the formula above.
50,000,000 sec = (50,000,000 ÷ 31,556,952) = 1.584437 yr
conversion scale showing seconds and equivalent years time values

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


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.


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.

Second to Year Conversion Table

Second measurements converted to years
Seconds Years
1 sec 0.000000031689 yr
2 sec 0.000000063377 yr
3 sec 0.000000095066 yr
4 sec 0.00000012675 yr
5 sec 0.00000015844 yr
6 sec 0.00000019013 yr
7 sec 0.00000022182 yr
8 sec 0.00000025351 yr
9 sec 0.0000002852 yr
10 sec 0.00000031689 yr
100 sec 0.0000031689 yr
1,000 sec 0.000031689 yr
10,000 sec 0.000317 yr
100,000 sec 0.003169 yr
1,000,000 sec 0.031689 yr
10,000,000 sec 0.316887 yr
100,000,000 sec 3.1689 yr


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

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