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Months Between Dates Calculator

Whole and fractional months between two dates.

Compute the number of whole months, fractional months (using 30.4375 days/month), total weeks, total days, and a friendly "X years, Y months, Z days" breakdown between two dates.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Whole months from CarbonImmutable::diffInMonths; fractional = total_days / 30.4375.

In depth

Compute the number of whole months, fractional months (using 30.4375 days/month), total weeks, total days, and a friendly "X years, Y months, Z days" breakdown between two dates.