Second to Year (average) Converter
1 s = 0 yr — convert instantly with formula and table.
Enter any number above and the result updates as you type. Everything runs locally in your browser, so it is instant and private.
Quick answer: one second equals 0.00000003 years. So to convert seconds to years, multiply by 0.00000003.
How to convert seconds to years
years = seconds × 0.0000000317
The second is the SI base unit of time, defined by 9,192,631,770 oscillations of a cesium atom — the tick behind every clock on Earth.
The average Gregorian year is 365.25 days — 31,557,600 seconds — the figure used for ages, interest rates and astronomy's light-year.
Second to Year (average) conversion table
| Second (s) | Year (average) (yr) |
|---|---|
| 0.01 s | 0 yr |
| 0.1 s | 0 yr |
| 0.25 s | 0.00000001 yr |
| 0.4 s | 0.00000001 yr |
| 0.75 s | 0.00000002 yr |
| 1.25 s | 0.00000004 yr |
| 1.75 s | 0.00000006 yr |
| 2.5 s | 0.00000008 yr |
| 3.5 s | 0.00000011 yr |
| 4.5 s | 0.00000014 yr |
| 6 s | 0.00000019 yr |
| 8 s | 0.00000025 yr |
| 10 s | 0.00000032 yr |
| 12 s | 0.00000038 yr |
| 14 s | 0.00000044 yr |
| 16 s | 0.00000051 yr |
| 18 s | 0.00000057 yr |
| 20 s | 0.00000063 yr |
| 24 s | 0.00000076 yr |
| 26 s | 0.00000082 yr |
| 30 s | 0.00000095 yr |
| 35 s | 0.00000111 yr |
| 45 s | 0.00000143 yr |
| 55 s | 0.00000174 yr |
| 65 s | 0.00000206 yr |
| 75 s | 0.00000238 yr |
| 85 s | 0.00000269 yr |
| 95 s | 0.00000301 yr |
| 110 s | 0.00000349 yr |
| 125 s | 0.00000396 yr |
| 175 s | 0.00000555 yr |
| 250 s | 0.00000792 yr |
| 350 s | 0.00001109 yr |
| 450 s | 0.00001426 yr |
| 600 s | 0.00001901 yr |
| 750 s | 0.00002377 yr |
| 900 s | 0.00002852 yr |
| 1,500 s | 0.00004753 yr |
| 2,500 s | 0.00007922 yr |
| 10,000 s | 0.00031688 yr |
Need the opposite direction? Use the Year (average) to Second converter, or read our complete guide to time conversions for every formula in one place.
Frequently asked questions
How many years are in one second?
One second equals 0.00000003 years. Multiply any second value by 0.00000003 to get years.
What is 10 seconds in years?
10 seconds equal 0.00000032 years (10 × 0).
Is the second to year (average) conversion exact?
The conversion factor used here (0.0000000317) is based on the internationally agreed definitions of both units, so results are exact up to rounding of the final decimal places.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.