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T. Valko T. Valko is offline
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Default SUMIF Greater than or equal to

Works OK for me when you make the ranges the same size:

=SUMIFS('Tab1'!B$2:B$200,'Tab1'!A$2:A$200,"="&A2, 'Tab1'!A$2:A$200,"<="&B2)

Note that in Excel 2007 there is a cell address TAB1 so in order for Excel
to know you're referencing a sheet named Tab1 and not the cell address TAB1
the sheet name Tab1 needs to be enclosed in single qoutes: 'Tab1'.

--
Biff
Microsoft Excel MVP


"envy" wrote in message
...
Hi -
I am trying to determine the number of customers I get in a specific time
range. My spreadsheet is as follows:
Tab 1 gives customers and times:
A B
Time # Customers
6:05 1
7:30 50
8:15 20
etc.

Tab 2 I calculate based on time ranges
A B C
Start End # of customers
6:01 6:30 need formula
6:31 7:00
7:01 7:30
etc.

Does anyone have a good formula? I have tried a few and the latest one
isn't working right:
=SUMIFS(Tab1!b2:b200,Tab1!a4:a200,"="&A2,Tab1!a4: a200,"<="&B2)
Any suggestions....
Thanks!
--
en