Dates & durations

Months Between Dates Calculator

Count complete calendar months without assuming every month has thirty days.

Your dates

On this device

Your dates are remembered here for 30 days. No account needed.

Your story in numbers

Every date has a story.

Enter your dates to discover your result and the next dates worth keeping.

YOUR NEXT DISCOVERY

One date. More ways to see it.

Compatible dates follow you to the next tool.

Dates & durations

Exact Date Difference Calculator

Break a date interval into calendar years, months and days.

Open tool →

Dates & durations

Add or Subtract from a Date

Add or subtract days, weeks, months or years. Includes 30, 60, 90 and 100-day shortcuts.

Open tool →

Dates & durations

Countdown to a Date

Follow the time remaining until an event, with your chosen time and time zone.

Open tool →

Understanding your result

Calendar durations respect month lengths. Day counts include the start and exclude the end unless selected otherwise. Civil-date intervals are not timestamp durations adjusted for daylight saving changes.

See a worked example

Illustrative example, as of September 13, 2026.

Start date: 2020-01-31
End date: 2026-09-13

79 complete months

Are my dates sent to a server?

Calculations run in your browser. Your dates stay on this device unless you choose to include them in a sharing link or image. “Clear my dates” removes them from local storage.