How to convert years to months
mo = yr × 12Multiply the value in years by 12. To go the other way, multiply by 0.08333333333 (or divide by 12).
A year is larger than a month: one year contains 12 months.
Worked examples
- 1 year (Gregorian)1 yr × 12 = 12 mo
- 5 years5 yr × 12 = 60 mo
- 10 years10 yr × 12 = 120 mo
- 20 years20 yr × 12 = 240 mo
- 100 years100 yr × 12 = 1,200 mo
Years to months conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Years (yr) | Months (mo) |
|---|---|
| 0.1 yr | 1.2 mo |
| 0.25 yr | 3 mo |
| 0.5 yr | 6 mo |
| 1 yr | 12 mo |
| 2 yr | 24 mo |
| 3 yr | 36 mo |
| 4 yr | 48 mo |
| 5 yr | 60 mo |
| 6 yr | 72 mo |
| 7 yr | 84 mo |
| 8 yr | 96 mo |
| 9 yr | 108 mo |
| 10 yr | 120 mo |
| Years (yr) | Months (mo) |
|---|---|
| 12 yr | 144 mo |
| 15 yr | 180 mo |
| 20 yr | 240 mo |
| 25 yr | 300 mo |
| 30 yr | 360 mo |
| 40 yr | 480 mo |
| 50 yr | 600 mo |
| 75 yr | 900 mo |
| 100 yr | 1,200 mo |
| 250 yr | 3,000 mo |
| 500 yr | 6,000 mo |
| 1,000 yr | 12,000 mo |
About the units
Year (yr)
The mean Gregorian calendar year of 365.2425 days, which accounts for leap years. One year equals 31,556,952 seconds (s).
Month (mo)
Calendar months range from 28 to 31 days; this converter uses the average Gregorian month of 30.436875 days. One month equals 2,629,746 seconds (s).
Frequently asked questions
How many months are in one year?
There are 12 months in one year, and this value is exact by definition.
How do I convert years to months?
Multiply the number of years by 12. For example, 10 yr × 12 = 120 mo.
How many years are in one month?
One month equals 0.08333333333 years. That is the reverse factor, 1 ÷ 12.
What is 10 years in months?
10 yr = 120 mo.
Is this yr to mo converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.