At One Place

Months to years

1 month in years
1 mo = 0.083333 yr
yr = mo × 1/12

To convert months to years, multiply by 0.08333333333. The table below gives the values people look up most often, and the converter works for any number.

Months to years table

Common month values converted to years.
Months Years
1 mo 0.083333
2 mo 0.16667
3 mo 0.25
4 mo 0.33333
5 mo 0.41667
10 mo 0.83333
15 mo 1.25
20 mo 1.666667
25 mo 2.083333
30 mo 2.5
40 mo 3.333333
50 mo 4.166667
75 mo 6.25
100 mo 8.333333
250 mo 20.83333
500 mo 41.66667
1,000 mo 83.33333

How the conversion works

The relationship is yr = mo × 1/12. Both units measure time, so the conversion is a fixed factor that never changes.

Month: Average calendar month (1/12 of a Gregorian year).

Year: Mean Gregorian year, 365.2425 days.

Common questions

How many years are in one month?
One month equals 0.083333 years. yr = mo × 1/12.
How do you convert months to years?
Use yr = mo × 1/12. So 10 mo is 0.83333 yr.
How many months are in one year?
One year equals 12 months, which is the reverse of the conversion above.
Is there more than one kind of month?
Average calendar month (1/12 of a Gregorian year). Mean Gregorian year, 365.2425 days.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked