Months to Years Converter
18 months equals 1.5 years, and 24 months equals exactly 2 years. This months to years converter switches between months and years using the exact rate of 12 months per year. It also shows a years-and-months breakdown, so 18 months reads as 1 year 6 months instead of only 1.5 years.
Quick answer
There are exactly 12 months in 1 year.
Result
1.5 years
Years and months
1 year 6 months
Exact rate
12 months = 1 year
What this tells you
- •There are exactly 12 months in 1 year.
- •To convert months to years, divide by 12.
- •To convert years to months, multiply by 12.
- •The years-and-months line shows the same answer in whole years plus leftover months.
How to Use
- 1Enter the amount you want to convert.
- 2Choose whether the value starts in months or years.
- 3Choose the unit you want as the result.
- 4Read the converted value and, when the result is in years, the years-and-months breakdown.
How It Works
Formula
years = months / 12Divide months by 12 to get years because 1 year contains exactly 12 months. To go the other way, multiply years by 12 to get months. For the years-and-months breakdown, take the whole years first, then the leftover months stay as the remainder. For example, 18 months divided by 12 is 1.5 years, which is 1 year 6 months.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
Convert 18 months to years
Divide 18 by 12 to get 1.5 years. That is the same duration as 1 year 6 months.
Convert 1.5 years to months
Multiply 1.5 by 12 to get 18 months.
Months to Years Conversions
Common values shown as decimal years and as whole years plus months.
| Months | Decimal years | Years and months |
|---|---|---|
| 6 months | 0.5 years | 0 years 6 months |
| 12 months | 1 year | 1 year 0 months |
| 18 months | 1.5 years | 1 year 6 months |
| 24 months | 2 years | 2 years 0 months |
| 36 months | 3 years | 3 years 0 months |
| 48 months | 4 years | 4 years 0 months |
| 60 months | 5 years | 5 years 0 months |
Common mistakes
- Dividing by 10 instead of 12. A year has 12 months, so 18 months is 1.5 years, not 1.8.
- Reading 1.5 years as 1 year 5 months. The 0.5 is half of a year, which is 6 months.
- Using this exact ratio for a specific date span. Calendar date ranges can depend on the start and end dates, so use a date calculator when you need actual dates.