Adding 2 column dates in Microsoft Access

[rangecontrol]

I have a column called Start Date it reads in this format: 3/13/2015 18:00. I have another column named End Date it reads in the same format.

I need to find out how many days/hours are logged in between these dates. Thank you for your assistance.

3/13/2015 18:00 3/15/2015 16:30

[zmbd]

Simple answer:
query
calculated field
built in function datediff function

The same can be done in a form as a calculated control; however, I tend to do most calculations at the query level when possible.

You should also note that:
Calculated fields misinterpreted

and

Calculating elapsed time

International Dates in Access

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