Years To Months Conversion (yr To Mo) - Inch Calculator

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• Years to Months Converter
• How to Convert Years to Months
• How Many Months Are in a Year?
• What Is a Year?
• What Is a Month?
• Year to Month Conversion Table

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Sexton, J. (n.d.). Years to Months Converter. Inch Calculator. Retrieved December 14, 2025, from https://www.inchcalculator.com/convert/year-to-month/

How to Convert Years to Months

To convert a measurement in years to a measurement in months, multiply the time by the following conversion ratio: 12 months/year.

Since one year is equal to 12 months, you can use this simple formula to convert:

months = years × 12

The time in months is equal to the time in years multiplied by 12.

For example, here's how to convert 5 years to months using the formula above.

months = (5 yr × 12) = 60 mo

How Many Months Are in a Year?

There are 12 months in a year, which is why we use this value in the formula above.

1 yr = 12 mo

The 12 months in the Gregorian calendar are:

1. January (31 days)
2. February (28 days - 29 on leap years)
3. March (31 days)
4. April (30 days)
5. May (31 days)
6. June (30 days)
7. July (31 days)
8. August (31 days)
9. September (30 days)
10. October (31 days)
11. November (30 days)
12. December (31 days)

Years and months are both units used to measure time. Keep reading to learn more about each unit of measure.

What Is a Year?

One year is the time it takes for the Earth to complete its orbit around the Sun. There are 365 days in a year, with the exception of the leap year when there are 366.

We have leap years because the Earth actually takes 365.2425 days to revolve around the sun, but we round to 365 for convenience. However, since we miss a quarter of a day per revolution around the sun, this means that we add an extra day to the year once every 4 years, hence the leap year.

Years can be abbreviated as yr (plural yrs), and are also sometimes abbreviated as y. For example, 1 year can be written as 1 yr or 1 y, and 2 years can be written as 2 yrs.

Learn more about years.

What Is a Month?

One month is a unit of time equal to 1/12 of a year. The month is a unit of time used most commonly in relation to the calendar, and ranges in length from 28 to 31 days.

Months can be abbreviated as mo (plural mos), and are also sometimes abbreviated as mth. For example, 1 month can be written as 1 mo or 1 mth, and 2 months can be written as 2 mos.

Learn more about months.

Year to Month Conversion Table

Table showing various year measurements converted to months.

Years	Months
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
11 yr	132 mo
12 yr	144 mo
13 yr	156 mo
14 yr	168 mo
15 yr	180 mo
16 yr	192 mo
17 yr	204 mo
18 yr	216 mo
19 yr	228 mo
20 yr	240 mo
21 yr	252 mo
22 yr	264 mo
23 yr	276 mo
24 yr	288 mo
25 yr	300 mo
26 yr	312 mo
27 yr	324 mo
28 yr	336 mo
29 yr	348 mo
30 yr	360 mo
31 yr	372 mo
32 yr	384 mo
33 yr	396 mo
34 yr	408 mo
35 yr	420 mo
36 yr	432 mo
37 yr	444 mo
38 yr	456 mo
39 yr	468 mo
40 yr	480 mo

More Year & Month Conversions

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• years to minutesChevron Right Icon
• years to secondsChevron Right Icon
• years to millisecondsChevron Right Icon
• years to microsecondsChevron Right Icon
• years to nanosecondsChevron Right Icon

Calendar IconConvert to Months

• centuries to monthsChevron Right Icon
• decades to monthsChevron Right Icon
• weeks to monthsChevron Right Icon
• days to monthsChevron Right Icon
• hours to monthsChevron Right Icon
• minutes to monthsChevron Right Icon
• seconds to monthsChevron Right Icon
• milliseconds to monthsChevron Right Icon
• microseconds to monthsChevron Right Icon
• nanoseconds to monthsChevron Right Icon