📅calculaFechas

📆 Months Between Dates Calculator

Calculate the exact number of months between two dates, with full and partial month breakdown. Free, accurate, and instant. Free to use — no sign-up, instant results.

📅 Format: MM/DD/YYYY

06/17/2026
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About This Tool

The Months Between Dates Calculator gives you the exact number of complete months between two dates, together with any remaining days. This is the go-to tool when you need to think about time in monthly increments — subscription billing cycles, lease durations, loan repayment terms, parental leave periods, academic semesters, medical treatment durations, and many other real-world scenarios where 'months' is the most natural unit.

Months are a more complex unit than days or weeks because they have variable lengths (28, 29, 30, or 31 days depending on the month and year). Our calculator handles this precisely: it counts full calendar months (from the same day-of-month in one month to the same day-of-month in the next), then adds any remaining days as a fractional component. This is the same method used in financial calculations and contract law to determine 'complete months'.

Common use cases include: calculating how many months until a loan matures; determining the length of a rental agreement in months; finding out how many billing cycles have occurred between two subscription dates; planning a multi-month project timeline; calculating the length of a sabbatical or parental leave; and working out how many months until a planned event or deadline. calculaFechas's Months Between Dates Calculator handles all of these with precision and clarity.

See also:📅 Days Between Dates Calculator🗓️ Weeks Between Dates Calculator📊 Years Between Dates Calculator

Examples

Jan 1 to Jun 30
5 months + 29 days
Jan 1 to Dec 31
11 months + 30 days
12-month lease
365 or 366 days

Frequently Asked Questions

How does the Months Between Dates Calculator work?+
Enter your start date and end date, then click Calculate. The tool counts the number of complete calendar months from the start date to the end date, then shows any remaining days. For example, from March 15 to June 20 is 3 months and 5 days — because 3 full months takes you to June 15, and there are 5 additional days to June 20.
Why doesn't the result match my manual count?+
Month counting can be tricky because months have different lengths. Our calculator counts complete months by matching the day-of-month (e.g., from the 15th of one month to the 15th of the next). If your end date is before the matching day in the final month, those days are shown as the 'remainder' rather than being rounded up to a full month. This is the internationally recognised standard for contract month counting.
What does the 'remaining days' figure mean?+
After counting all complete months, the remaining days represent the partial month at the end of the period. For example, '3 months and 12 days' means exactly 3 complete calendar months have passed, plus an additional 12 days into the next month. This gives you a precise fractional view of the total period.
How many months are between two specific dates?+
Use this calculator to find out. The calculation accounts for variable month lengths and leap year effects. For a simple approximation, divide the total number of days by 30.44 (the average Gregorian month length), but our calculator gives you the precise whole-months-plus-days result.
Is this useful for subscription billing?+
Yes, very much so. Many subscription services and SaaS products bill monthly from the subscription start date. Use this calculator to verify how many complete billing periods have elapsed between two dates, or to determine when the next anniversary billing date will fall.
What about loan repayment periods?+
Loan terms are almost always expressed in months. Use this calculator to verify the precise duration of a loan period, check when monthly instalments should have begun or ended, or confirm the total number of payment periods in a loan agreement.

Related Tools

📅Days Between Dates Calculator🗓️Weeks Between Dates Calculator📊Years Between Dates Calculator➕Add Days to Date