Convert Seconds to Years
1 second is 0 yr. One second is exactly 3.16887385068e-8 years.
One second is 3.1689 × 10^-8 years. To convert seconds to years, multiply by 3.1689 × 10^-8; to go the other way, divide by 3.1689 × 10^-8 or multiply by 31556952. This one is an average rather than an exact factor: a calendar year is 365 days or 366, so this figure is an average across the 400-year leap cycle. The definition comes from BIPM SI Brochure. The SI base unit of time, fixed since 1967 by the caesium-133 hyperfine transition frequency of 9,192,631,770 Hz.
Factor checked against the defining standard · How we check
- Seconds × 3.1689 × 10^-8
value * 3.16887385068e-80 yr
1 second in every time unit
| Unit | Value | Exact factor |
|---|---|---|
| seconds (as entered) | 1 s | — |
| minutes | 0.01666666667 min | × 0.0166666666667 |
| hours | 0.0002777777778 h | × 0.000277777777778 |
| days | 0.00001157407407 d | × 0.0000115740740741 |
| weeks | 0.000001653439153 wk | × 0.00000165343915344 |
| months | 0.0000003802648621 mo | × 0.000000380264862082 |
| years | 0.00000003168873851 yr | × 0.0000000316887385068 |
Factors are entered by hand from BIPM SI Brochure rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert seconds to years?
- 1.Take the measurement in seconds.
- 2.Multiply by 3.1689 × 10^-8 — that is how many years fit in one second.
- 3.To go back the other way, divide by 3.1689 × 10^-8, or multiply by 31556952.
Seconds to years conversion table
| Seconds | Years |
|---|---|
| 1 s | 0 yr |
| 2 s | 0 yr |
| 3 s | 0 yr |
| 4 s | 0 yr |
| 5 s | 0 yr |
| 6 s | 0 yr |
| 7 s | 0 yr |
| 8 s | 0 yr |
| 9 s | 0 yr |
| 10 s | 0 yr |
| 12 s | 0 yr |
| 15 s | 0 yr |
| 20 s | 0.000001 yr |
| 25 s | 0.000001 yr |
| 50 s | 0.000002 yr |
| 100 s | 0.000003 yr |
What are seconds and years?
- Second (s)
- The SI base unit of time, fixed since 1967 by the caesium-133 hyperfine transition frequency of 9,192,631,770 Hz.
- Year (yr)
- The average Gregorian year, 365.2425 days — the figure the leap-year rule exists to produce.
Source: BIPM SI Brochure — the second, and units accepted for use with the SI
Questions people actually ask
- How many years are in a second?
- 3.1689 × 10^-8. The average Gregorian year, 365.2425 days — the figure the leap-year rule exists to produce.
- How do I convert years back to seconds?
- Divide by 3.1689 × 10^-8, or multiply by 31556952 — they are the same operation.
Other time conversions
Years to seconds — the same conversion the other way.