Years to Seconds Converter
1 year = 31,556,952 seconds
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 year equals 31,557,000 seconds
How to convert years to seconds
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.
s = yr × 31556952One year is 31556952 seconds, so a single multiplication converts any value.
315,570,000 s ≈ 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.
Years to seconds conversion table
Common values in years, converted to seconds.
| Years (yr) | Seconds (s) |
|---|---|
| 1 | 31,556,952 |
| 2 | 63,113,904 |
| 5 | 157,784,760 |
| 10 | 315,569,520 |
| 15 | 473,354,280 |
| 30 | 946,708,560 |
| 60 | 1,893,417,100 |
| 90 | 2,840,125,700 |
| 120 | 3,786,834,200 |
About these units
yearyr
The mean Gregorian year: 365.2425 days.
seconds
The SI base unit of time, defined by the caesium-133 hyperfine transition frequency.
Reference: BIPM SI Brochure (9th ed.).
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.