Month Calculator: Number of Months Between Dates

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Below is a month between dates calculator. Enter a start date and an end date and the month calculator will return the number of months and days separating the two.

Months Between Dates Calculator

Using the Month Calculator

To compute the distance in months and days between two dates, simply fill out the two input fields:

  • First date: Enter the date to start the calculation
  • Second date: Enter the end date for the calculation

Follow that up by hitting 'Calculate Months Difference'. Next, you'll get:

  • Months Between: The number of months and days between the two dates you enter
Month calculator showing the difference between two dates by number of months.
Result of a run on the month calculator between two dates just over a year apart.

I also built a months from now and months ago tool, if this one isn't doing it for you.

What if the first date comes after the second?

The tool works no matter the order of dates you enter. Enter them as you wish!

Why does a year difference (or multiple) show less than a multiple of twelve months?

The calculator does not count the final day in the time-frame. That is, it counts the day of the first date but not the ending date.

To get around this, bump the date by one in the end. For example, June 1, 2000 to June 1, 2001 is less than twelve months. However, June 1, 2000 to June 2, 2001 is 12 months.

How do you use the month calculator?

The month difference calculator can be used much like the day difference calculator or week difference calculator. Use it to figure out the timespan that two events or frames overlapped.

Time, Date, and Birthday Calculators

Months calculator tapped out? Want a different timeframe? You're only seeing one of many of our tools...

See one of our other date, hour, week, or birthday calculators:

We also have other investment, personal finance, and economics tools. Check them out!



PK started DQYDJ in 2009 to research and discuss finance and investing and help answer financial questions. He's expanded DQYDJ to build visualizations, calculators, and interactive tools.

PK lives in New Hampshire with his wife, kids, and dog.

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