Years to Days Converter
1 year = 365.2425 days
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.
The calendar day is exactly 86,400 s here. Actual solar days vary by milliseconds, and leap seconds have occasionally been added to civil time.
1 year equals 365.243 days
How to convert years to days
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.
d = yr × 365.2425One year is 365.2425 days, so a single multiplication converts any value.
3,652.43 d ≈ 10 × 365.2425A 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.
The calendar day is exactly 86,400 s here. Actual solar days vary by milliseconds, and leap seconds have occasionally been added to civil time.
Years to days conversion table
Common values in years, converted to days.
| Years (yr) | Days (d) |
|---|---|
| 1 | 365.2425 |
| 2 | 730.485 |
| 5 | 1,826.2125 |
| 10 | 3,652.425 |
| 15 | 5,478.6375 |
| 30 | 10,957.275 |
| 60 | 21,914.55 |
| 90 | 32,871.825 |
| 120 | 43,829.1 |
About these units
yearyr
The mean Gregorian year: 365.2425 days.
dayd
Exactly 24 hours, or 86,400 seconds.
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.