How to convert seconds to years
yr = s × 3.168873851×10⁻⁸Because one year equals 31,556,952 seconds, you can also divide: yr = s ÷ 31,556,952.
A second is smaller than a year: it takes 31,556,952 seconds to make one year.
Worked examples
- 1 second1 s × 3.168873851×10⁻⁸ = 3.168873851×10⁻⁸ yr
- 5 seconds5 s × 3.168873851×10⁻⁸ = 1.584436925×10⁻⁷ yr
- 10 seconds10 s × 3.168873851×10⁻⁸ = 3.168873851×10⁻⁷ yr
- 20 seconds20 s × 3.168873851×10⁻⁸ = 6.337747701×10⁻⁷ yr
- 100 seconds100 s × 3.168873851×10⁻⁸ = 0.000003168873851 yr
Seconds to years conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Seconds (s) | Years (yr) |
|---|---|
| 0.1 s | 3.1688739×10⁻⁹ yr |
| 0.25 s | 7.9221846×10⁻⁹ yr |
| 0.5 s | 1.5844369×10⁻⁸ yr |
| 1 s | 3.1688739×10⁻⁸ yr |
| 2 s | 6.3377477×10⁻⁸ yr |
| 3 s | 9.5066216×10⁻⁸ yr |
| 4 s | 1.2675495×10⁻⁷ yr |
| 5 s | 1.5844369×10⁻⁷ yr |
| 6 s | 1.9013243×10⁻⁷ yr |
| 7 s | 2.2182117×10⁻⁷ yr |
| 8 s | 2.5350991×10⁻⁷ yr |
| 9 s | 2.8519865×10⁻⁷ yr |
| 10 s | 3.1688739×10⁻⁷ yr |
| Seconds (s) | Years (yr) |
|---|---|
| 12 s | 3.8026486×10⁻⁷ yr |
| 15 s | 4.7533108×10⁻⁷ yr |
| 20 s | 6.3377477×10⁻⁷ yr |
| 25 s | 7.9221846×10⁻⁷ yr |
| 30 s | 9.5066216×10⁻⁷ yr |
| 40 s | 0.0000012675495 yr |
| 50 s | 0.0000015844369 yr |
| 75 s | 0.0000023766554 yr |
| 100 s | 0.0000031688739 yr |
| 250 s | 0.0000079221846 yr |
| 500 s | 0.000015844369 yr |
| 1,000 s | 0.000031688739 yr |
About the units
Second (s)
The SI base unit of time, defined by 9,192,631,770 periods of caesium-133 radiation.
Year (yr)
The mean Gregorian calendar year of 365.2425 days, which accounts for leap years. One year equals 31,556,952 seconds (s).
Frequently asked questions
How many years are in one second?
There are 3.168873851×10⁻⁸ years in one second, and this value is exact by definition.
How do I convert seconds to years?
Multiply the number of seconds by 3.168873851×10⁻⁸. For example, 10 s × 3.168873851×10⁻⁸ = 3.168873851×10⁻⁷ yr.
How many seconds are in one year?
One year equals 31,556,952 seconds. That is the reverse factor, 1 ÷ 3.168873851×10⁻⁸.
What is 10 seconds in years?
10 s = 3.168873851×10⁻⁷ yr.
Is this s to yr converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.