How to Convert Days to Months in Google Sheets

To convert days to months in Google Sheets, you can use the formula =days/30. This will calculate the number of months based on the number of days, rounding to the nearest whole number. You can also multiply the number of days by 0.033 to get the same result. To get more accurate results, you can use the formula =days/30.436875, which takes into account the number of days in each month.


You can use the following formula in Google Sheets to convert days to months:

=(B1-A1)/(365/12)

This formula calculates the number of months between cell B1 (the end date) and cell A1 (the start date).

The following example shows how to use this formula in practice.

Example: Convert Days to Months in Google Sheets

Suppose we have the following list of start and end dates in Google Sheets:

We could use the following formula to calculate the number of days between each start and end date:

B2-A2

We can type this formula into cell C2 and then copy and paste it down to every remaining cell in column C:

Column C shows the difference (in days) between each start and end date.

However, we could instead use the following formula to calculate the difference between each start and end date in terms of months:

=(B2-A2)/(365/12)

We can type this formula into cell C2 and then copy and paste it down to every remaining cell in column C:

Column C shows the number of months (including decimal places) between each start and end date.

  • There are 0.5589 months between 1/1/2020 and 1/18/2020.
  • There are 2.1041 months between 2/1/2020 and 4/5/2020.
  • There are 0.1644 months between 3/1/2020 and 3/6/2020.

And so on.

Note that you could instead use this formula to calculate the number of months between two dates if you’d like to assume that 30 days represents an average month:

=(B2-A2)/30

However, this is not as accurate as using (365/12) as the denominator in the formula.

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