Hi Danny,

=MIN(B2,DATE(2009,1,31))-MAX(A2,DATE(2009,1,1))+1

--
Kind regards,

Niek Otten
Microsoft MVP - Excel

"Danny" wrote in message
...
Hi there, I'm not quite sure if this can be done or not, but any
help/advice
would be really appreciated.

I would like to work out capacity (in days) of a certain month from
different start dates and end dates. As an example below, I would like to
display for each record how many days in January are being used; so row 2
should display 26 days in January, row 3 the full 31 days in January, and
row
4 should be 2 days in January.

A B
1 start end
2 14th Nov 08 26th Jan 09
3 16th Oct 08 04 Feb 09
4 30th Jan 09 10 Feb 09

Is there a formula to display this?
thanks,
Danny.