Seconds to Decades Conversion

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

Results in Decades:
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1 sec = 3.1689E-9 decades
Hint: use a scientific notation calculator to convert E notation to decimal
Do you want to convert decades to seconds?

How to Convert Seconds to Decades

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

Since one decade is equal to 315,569,520 seconds, you can use this simple formula to convert:

decades = seconds ÷ 315,569,520

The time in decades is equal to the seconds divided by 315,569,520.

For example, here's how to convert 500,000,000 seconds to decades using the formula above.
500,000,000 sec = (500,000,000 ÷ 315,569,520) = 1.584437 decades

Seconds and decades 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.


The decade is a time period of 10 years.

Second to Decade Conversion Table

Second measurements converted to decades
Seconds Decades
1 sec 0.0000000031689
2 sec 0.0000000063377
3 sec 0.0000000095066
4 sec 0.000000012675
5 sec 0.000000015844
6 sec 0.000000019013
7 sec 0.000000022182
8 sec 0.000000025351
9 sec 0.00000002852
10 sec 0.000000031689
100 sec 0.00000031689
1,000 sec 0.0000031689
10,000 sec 0.000031689
100,000 sec 0.000317
1,000,000 sec 0.003169
10,000,000 sec 0.031689
100,000,000 sec 0.316887
1,000,000,000 sec 3.1689


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

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