Years to days
One yr equals 365.2425 d. Type any number and the answer appears as you type — the maths happens in your browser.
Result
The same value in every unit
| Unit | Value |
|---|
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Common values
| years | days |
|---|---|
| 1 yr | 365.2425 d |
| 2 yr | 730.485 d |
| 3 yr | 1095.7275 d |
| 5 yr | 1826.2125 d |
| 10 yr | 3652.425 d |
| 15 yr | 5478.6375 d |
| 20 yr | 7304.85 d |
| 25 yr | 9131.0625 d |
| 50 yr | 18262.125 d |
| 100 yr | 36524.25 d |
| 500 yr | 182621.25 d |
| 1000 yr | 365242.5 d |
How to use
- Enter the number of years in the field.
- The result in days updates on every keystroke.
- Use the table below for the values people look up most often.
Formula and reverse conversion
The formula
To convert by hand: d = yr × 365.2425. Going back the other way, one d is 0.002737907007 yr.
How long a month and a year are here
A month here is the average Gregorian month, 30.44 days, and a year is 365.2425 days. That is the right basis for questions like “how many hours in three months”, but not for a specific calendar month.
d = yr × 365.2425
Frequently asked questions
How many days are in one years?
One yr is 365.2425 d.
How do I convert years to days?
Multiply by the factor: d = yr × 365.2425.
Is the result exact?
The factors are the exact legal definitions, and up to ten significant digits are kept in the answer. Rounding happens only in the display.
How do I convert days back to years?
One d is 0.002737907007 yr — or open the reverse page linked below.