Years to Months Converter

The formula is: months = years × 12.

Worked example: 4 years is 48 months.

To go the other way, use the Months to Years Converter, which divides by 12 instead of multiplying.

There are 12 months in a year: January, February, March, April, May, June, July, August, September, October, November, and December. Seven have 31 days, four have 30, and February has 28 (29 in a leap year).

Because the count of months is always 12, converting years to months never needs an average. Converting months to days or weeks is different, since months range from 28 to 31 days.

It was not always 12. The early Roman calendar had only 10 months and began in March, which is why September, October, November, and December are named after the Latin words for seven, eight, nine, and ten. January and February were added later, and the Julian calendar introduced by Julius Caesar fixed the 12 month year with its leap day. The word month itself comes from moon, since months were first based on the lunar cycle.

Common Loan Terms in Months

Common values in years and their equivalents in months:

Pediatric growth charts and developmental milestones track children in months until about age 2 or 3, car loans and leases are quoted in months, and many job applications ask for experience in months. Converting years to months makes these numbers directly comparable.

To measure the real time between two dates in years, months and days, use the Time Between Dates Calculator. To check whether a year has a leap day, use the Leap Year Calculator.

Every time converter that shares a unit with this page, starting with the reverse conversion, one page per pair of units, then the converters that show many units at once.

• Months to Years Converter: 1 year = 12 months
• Days to Months Converter: 1 month is 30.4375 days on average
• Days to Years Converter: 1 year is 365.25 days on average
• Hours to Years Converter: 1 year is 8,766 hours on average
• Minutes to Years Converter: 1 year is 525,960 minutes on average
• Seconds to Years Converter: 1 year is 31,557,600 seconds on average
• Months to Weeks Converter: 1 month is about 4.348214 weeks on average
• Weeks to Years Converter: 1 year is about 52.178571 weeks on average
• Decades to Years Converter: 1 decade = 10 years
• Day Converter: days to hours, minutes, weeks, fortnights, months and years at once
• Hour Converter: hours to minutes, seconds, days, weeks, months and years at once
• Minute Converter: minutes to hours, seconds, days, weeks and more at once
• Seconds Converter: seconds to milliseconds, nanoseconds, minutes, hours and more at once
• Time Unit Converter: any amount of time in 13 units, from picoseconds to decades