Days to Years (average) converter

To convert days to years (average), enter the value in the first field. The result in years (average) is calculated automatically using the exact conversion factor.

1 d ≈ 0.00273790700699 yr
1 yr = 365.2425 d

Formula: yr ≈ d × 0.00273790700699
d = yr × 365.2425

Definitions: 1 d = 24 h; 1 yr = 365.2425 d

The day (d) here is exactly 86,400 seconds, or 24 hours. The real solar day varies slightly, and some days with leap seconds last 86,401 seconds, but this converter uses the standard 24-hour day.

The year here is the average Gregorian calendar year of 365.2425 days, or 31,556,952 seconds. Actual calendar years have 365 or 366 days, so the result for a specific year can differ by up to a day.

See the conversion table with commonly used values, handy for quick reference or study.