Convert Second to Year
Use this free converter to change seconds (s) into years (yr). Second and year both measure time. As a quick reference, 1 s equals 3.1688e-8 yr, and 1 yr equals 31557600 s.
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Year (yr)
3.1688e-8
1 s = 3.1688e-8 yr
Time conversion table
| Second | Year |
|---|---|
| 0.01 | 3.1688e-10 |
| 0.1 | 3.1688e-9 |
| 0.5 | 1.5844e-8 |
| 1 | 3.1688e-8 |
| 2 | 6.3376e-8 |
| 3 | 9.5064e-8 |
| 5 | 1.5844e-7 |
| 10 | 3.1688e-7 |
| 20 | 6.3376e-7 |
| 25 | 7.9220e-7 |
| 50 | 0.0000015844044 |
| 100 | 0.0000031688088 |
| 1,000 | 0.000031688088 |
How to convert Second to Year
Multiply the second value by 3.1688e-8 to get years.
- Enter the number of seconds you want to convert.
- The converter instantly shows the equivalent value in years.
- Worked example: 15 s × 3.1688e-8 = 4.7532e-7 yr.
- Use the swap button to reverse the conversion (year to second).
About these units
Second (s)
- Definition
- The second (s) is the SI base unit of time, defined by the radiation frequency of the caesium-133 atom.
- History
- Once 1/86,400 of a day, it was redefined in 1967 using atomic transitions for far greater precision.
- Current use
- The second is the foundation of timekeeping in science, technology, and daily life.
Year (yr)
- Definition
- A year (yr) is the time for the Earth to orbit the Sun, about 365.25 days.
- History
- Calendars from the Julian to the Gregorian refined the year to keep the seasons aligned.
- Current use
- Years are the standard unit for age, anniversaries, and long-term measurement.
Frequently asked questions
How many years are in a second?
There are 3.1688e-8 yr in 1 s. To convert, multiply the number of seconds by 3.1688e-8.
How do I convert seconds to years?
Multiply the second value by 3.1688e-8 to get years. For example, 10 s = 3.1688e-7 yr.
Is this second-to-year converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Second to other time units
| Unit | 1 Second equals |
|---|---|
| Millisecond (ms) | 1000 ms |
| Microsecond (µs) | 1000000 µs |
| Minute (min) | 0.016666667 min |
| Hour (h) | 0.00027777778 h |
| Day (d) | 0.000011574074 d |
| Week (wk) | 0.0000016534392 wk |
| Month (mo) | 3.8026e-7 mo |
| Year (yr) | 3.1688e-8 yr |