Years to months
One yr equals 12 mo. 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 | months |
|---|---|
| 1 yr | 12 mo |
| 2 yr | 24 mo |
| 3 yr | 36 mo |
| 5 yr | 60 mo |
| 10 yr | 120 mo |
| 15 yr | 180 mo |
| 20 yr | 240 mo |
| 25 yr | 300 mo |
| 50 yr | 600 mo |
| 100 yr | 1200 mo |
| 500 yr | 6000 mo |
| 1000 yr | 12000 mo |
How to use
- Enter the number of years in the field.
- The result in months 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: mo = yr × 12. Going back the other way, one mo is 0.08333333333 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.
mo = yr × 12
Frequently asked questions
How many months are in one years?
One yr is 12 mo.
How do I convert years to months?
Multiply by the factor: mo = yr × 12.
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 months back to years?
One mo is 0.08333333333 yr — or open the reverse page linked below.