Convert years to months
Converting years to months is a common time task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 yr equals 12 mo, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert years to months
To convert years to months, multiply the number of years by 12. For example, 10 yr × 12 = 120 mo.
mo = yr × 12
- Write down the value in years you want to convert.
- Multiply it by 12 (the exact yr→mo factor).
- The result is your value in months. Check it below with the converter or the table.
Conversion table
Common values of years and their equivalents in months:
| yr | mo |
|---|---|
| 1 | 12 |
| 2 | 24 |
| 3 | 36 |
| 4 | 48 |
| 5 | 60 |
| 10 | 120 |
| 20 | 240 |
| 25 | 300 |
| 50 | 600 |
| 100 | 1,200 |
| 250 | 3,000 |
| 500 | 6,000 |
About these units
Year (yr). A year is the period of Earth's orbit around the Sun. This tool uses the Gregorian average of 365.2425 days, which matches the calendar over the 400-year leap cycle.
Month (mo). A month is the approximate period of the Moon's orbit, but calendar months vary from 28 to 31 days. For conversions this tool uses the Gregorian average of 30.436875 days.
Frequently asked questions
How do I convert years to months?
To convert years to months, multiply the number of years by 12. For example, 10 yr × 12 = 120 mo. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many months are in 1 year?
1 yr = 12 mo. That is the fixed relationship used by this converter and by international standards.
How many years are in 1 month?
1 mo = 0.0833333 yr. If you are converting in the opposite direction, use our Month to Year converter for the dedicated table and FAQ.
Is the years to months conversion exact?
Calendar months range from 28 to 31 days, so month–year conversions use fixed averages: 1 month = 30.436875 days and 1 year = 365.2425 days (the Gregorian 400-year mean). The math is exact for those standard averages.
What is year used for?
A year is the period of Earth's orbit around the Sun. This tool uses the Gregorian average of 365.2425 days, which matches the calendar over the 400-year leap cycle.