How to convert seconds to years
Seconds and Years both measure time, so converting is a single multiplication. One s equals 3.1688e-8 yr, so you multiply your seconds value by 3.1688e-8.
Formula: years = seconds × 3.1688e-8. For example, 10 s = 3.1688e-7 yr.
Seconds to Years conversion table
| Seconds (s) | Years (yr) |
|---|---|
| 1 | 3.1688e-8 |
| 2 | 6.3376e-8 |
| 5 | 1.5844e-7 |
| 10 | 3.1688e-7 |
| 25 | 7.9220e-7 |
| 50 | 1.5844e-6 |
| 100 | 3.1688e-6 |
| 1,000 | 0.000032 |
Seconds and Years explained
Seconds (s): The SI base unit of time.
Years (yr): About 365.25 days, accounting for leap years.
When you'd convert seconds to years
You'll convert seconds to years whenever a measurement is given in one unit but you need it in the other — comparing seconds and years figures across regions, following a recipe or spec, or double-checking a number. Because 1 s is exactly 3.1688e-8 yr, the result is precise every time.
Frequently asked questions
How many years are in a second?
One s equals 3.1688e-8 yr. Multiply your seconds figure by 3.1688e-8 to get years.
What is the formula to convert seconds to years?
years = seconds × 3.1688e-8. The factor 3.1688e-8 is exact.
What is 2 seconds in years?
2 s = 6.3376e-8 yr. You can enter any value in the converter above to get an instant result.
Is this Seconds to Years converter accurate?
Yes. It uses the standard conversion factor (1 s = 3.1688e-8 yr) defined by BIPM — SI Brochure (definition of the second), so results are exact to several decimal places.