Hi

To convert your data, assuming the value is in A1
=--("00:00"&A1)
will convert it to a format that Excel understands as time.
You need to choose FormatCellsNumberCustom and choose hh:mm:ss
To sum the times just use =SUM(A1:A100) but format the cell as
[hh]:mm:ss to allow it to sum past 24 hours if necessary.

Regards

Roger Govier



cs78 via OfficeKB.com wrote:

Hi everyone,

I'm having problems summing up a range of values. It's supposed to be time
but because the range of data was copied over from another program, 30
seconds would be displayed as ":30".

I've tried auto adding a "0" or "00" in front of it and changing the formats
to mm:ss but the sum of the range of figures still comes up as 00:00. Anyone
knows how I can go about summing up the total amount of time? Thanks!