# Date calculations

#### EJKS

##### New Member
I've enjoyed learning a lot from this forum, but I've added in complications that take this query beyond my capability.

Column A is the start date
Column B is the end date
Column C is the length of time in days between start and end
Eg A = 01/01/2000, B = 03/01/2000 then C = 2
However, if A is empty, C should remain empty. If A contains a date but B is empty, C should calculate number of days up to today's date.

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#### etaf

##### Well-known Member
=IF( A2="","", IF( B2="", Today() - A2, B2-A2))

#### EJKS

##### New Member
T
=IF( A2="","", IF( B2="", Today() - A2, B2-A2))
Thanks for the super quick reply! Seeing the correct formula also lets me understand where I was going wrong, thank you!

you are welcome

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