Months Between Dates Calculator
Count full months and extra days between two dates.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Months Between Dates Calculator
How to use this tool
- Enter the start date and the end date.
- Press Generate to see the full months and the remaining days.
- Use Load sample for 2024-01-15 to 2025-03-10, or Clear to start again.
Worked example
From 2024-01-15 to 2025-03-10 there are 13 full months (up to 2025-02-15) plus 23 days, which is 420 days in total.
What this tool does not do / Limits
A full month is counted from a date to the same day of a later month. Months have different lengths, so the same number of full months can cover a different number of days.
Frequently asked questions
Is 2024-01-31 to 2024-02-29 one full month?
Yes in this tool: the end of a shorter month counts as the matching month-end, so 31 January to 29 February is one full month.
Why show both months and total days?
Months are useful for tenures and ages, while total days are exact; showing both avoids confusion from months of different lengths.
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