Months Between Dates Calculator: Formula & Worked Example

Calculate approximate elapsed months using 30.4375 days per month. Calculate instantly in your browser with editable inputs, a worked example and clear assumptions. No account required.

How it is calculated

Calendar-day difference ÷ 30.4375

An approximate elapsed-month measure, not a count of completed calendar months.

Worked example

Start date

2026-01-01

End date

2026-03-01

Example result: 1.94 months

The interactive tool lets you edit every input and reset to this example. Calculations run in your browser.

Questions and answers

Are my calculator inputs sent to a server?

These calculations run in your browser. The calculator does not send your entered values to a calculation server or save them to your learning account.

Why can the result differ from a full spreadsheet model?

Each calculator uses the equation and assumptions shown on this page. Displayed values may be rounded. A workbook with different timing, fees, filters or source data can produce a different result.

Can I use the calculator without an account?

Yes. All 73 calculators are available to guest learners. The worked example shows the default inputs, and Reset restores them.

Related calculators

• Days Between Dates — Count calendar days from a start date to an end date.
• Business Days — Count weekdays between two dates, excluding Saturdays and Sundays.
• Weeks Between Dates — Calculate elapsed weeks between two dates.

All 73 calculators · Practise in the Excel Simulator

Interactive practice runs in your browser.