Conversion formula

The conversion factor from years to months is 12, which means that 1 year is equal to 12 months:

1 yr = 12 mo

To convert 40 years into months we have to multiply 40 by the conversion factor in order to get the time amount from years to months. We can also form a simple proportion to calculate the result:

1 yr → 12 mo

40 yr → T_(mo)

Solve the above proportion to obtain the time T in months:

T_(mo) = 40 yr × 12 mo

T_(mo) = 480 mo

The final result is:

40 yr → 480 mo

We conclude that 40 years is equivalent to 480 months:

40 years = 480 months

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 month is equal to 0.0020833333333333 × 40 years.

Another way is saying that 40 years is equal to 1 ÷ 0.0020833333333333 months.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that forty years is approximately four hundred eighty months:

40 yr ≅ 480 mo

An alternative is also that one month is approximately zero point zero zero two times forty years.

Conversion table

years to months chart

For quick reference purposes, below is the conversion table you can use to convert from years to months