Calculate diff in dates for specific ID

[SajMc]

Dears
I have an excel sheet, with a Id in 1st column and dates in 4th column. The IDs are in number format.
I want to calculate the no of days for the dates in the above row until the ID in first column is same. It should restart new calculation when the Id changes. Is there any formula to do this.

[AliGW]

Will you please attach a sample Excel workbook?

1. Make sure that your sample data are REPRESENTATIVE of your real data. The use of unrepresentative data is very frustrating and can lead to long delays in reaching a solution.

2. Make sure that your desired results are also shown (mock up the results manually).

3. Make sure that all confidential data is removed or replaced with dummy data first (e.g. names, addresses, E-mails, etc.).

4. Try to avoid using merged cells as they cause lots of problems.

Unfortunately the attachment icon doesn't work at the moment, so to attach an Excel file you have to do the following: just before posting, scroll down to Go Advanced and then scroll down to Manage Attachments. Now follow the instructions at the top of that screen.

Please pay particular attention to point 2 (above): without an idea of your intended outcomes, it is often very difficult to offer appropriate advice.

[AliGW]

This thread has been marked solved - is it?