Excel formula within spreadsheet to calculate hours worked

Question

I have been struggling for some time to find formula for a spreadsheet I am trying to manage / create relating to working times.

Column B contains the start time.
Column C contains finish time.

When you work beyond 7pm in the evening the hours that follow are noted and required to be counted as irregular hours.

This would be calculated and shown in column E.

I would like assistance in how to calculate and find a formula for this function.

Within this spreadsheet I have hours worked in column D and I would like also a calculation to show when employee works more than 7 hours (column E).

Answer 1

If your values in cells formatted as time -hh:mm- :

In column E :
(You need to calculate times after 7:00pm -In Row 2-)

=IF(C2>TIME(19;0;0);C2-TIME(19;0;0); 0)

In column D :
(You need to calculate time between start and finish)

=B2-C2

If your cells formatted to text :
Use a conversion by TimeValue() function.