Seconds to Years Converter
1 second ≈ 3.16887385e-8 years
A calendar year is 365 days, or 366 in a leap year. This converter uses the mean Gregorian year of 365.2425 days, which is the long-run average once leap years are included.
1 second equals 3.16887e-8 years
How to convert seconds to years
A day here is a duration of 86,400 seconds. Unless explicitly labeled Julian, months and years use the mean Gregorian convention (365.2425 days per year; one twelfth per month), rather than the actual length of a particular calendar interval.
yr = s ÷ 31556952One year corresponds to 31556952 seconds, so divide by that figure. Displayed constants may be rounded; the converter uses the stored factor before rounding the result.
0.000000316887 yr ≈ 10 ÷ 31556952A calendar year is 365 days, or 366 in a leap year. This converter uses the mean Gregorian year of 365.2425 days, which is the long-run average once leap years are included.
Seconds to years conversion table
Common values in seconds, converted to years.
| Seconds (s) | Years (yr) |
|---|---|
| 1 | 3.1688739e-8 |
| 2 | 6.3377477e-8 |
| 5 | 0.00000015844369 |
| 10 | 0.00000031688739 |
| 15 | 0.00000047533108 |
| 30 | 0.00000095066216 |
| 60 | 0.0000019013243 |
| 90 | 0.0000028519865 |
| 120 | 0.0000038026486 |
About these units
seconds
The SI base unit of time, defined by the caesium-133 hyperfine transition frequency.
Reference: BIPM SI Brochure (9th ed.).
yearyr
The mean Gregorian year: 365.2425 days.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.