Calculate Number of Class Sessions between a Start and End Date
I've tried many variations of formulas, but I am getting #INCORRECT ARGUMENT SET every time.
[Session (Days)]: Dropdown box, multiselect, days of week (e.g., "Tuesday", "Monday and Wednesday")
Session Meeting (Start Date): Date column, enter start date of course (e.g., 2/11/2025)
Session Meeting (End Date): Date column, enter end date of course (e.g., 5/30/2025)
I want to calculate how many actual session meetings there are. For example, if they choose "Monday and Wednesday", I want the formula to count how many Mondays and Wednesday are on the calendar between (and including) the Start and End dates. (Note: [Session (Days)] can include Saturday and Sunday, so the formula should not exclude weekends.)
EXAMPLE: Sessions are on Tuesdays, between January 7, 2025, and April 8, 2025. There are 13 Tuesdays between (and including) those dates.
Thanks for any suggestions!
Best Answer
-
If you don't mind adding some helper columns this should work for you…
Add the following columns with the associated column formulas:
Total Sundays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) = 1, WEEKDAY([Session Meeting (End Date)]@row) >= 1), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 1, WEEKDAY([Session Meeting (End Date)]@row) < 1), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 1, WEEKDAY([Session Meeting (End Date)]@row) < 1), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Mondays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 2, WEEKDAY([Session Meeting (End Date)]@row) >= 2), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 2, WEEKDAY([Session Meeting (End Date)]@row) < 2), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 2, WEEKDAY([Session Meeting (End Date)]@row) < 2), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Tuesdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 3, WEEKDAY([Session Meeting (End Date)]@row) >= 3), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 3, WEEKDAY([Session Meeting (End Date)]@row) < 3), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 3, WEEKDAY([Session Meeting (End Date)]@row) < 3), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Wednesdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 4, WEEKDAY([Session Meeting (End Date)]@row) >= 4), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 4, WEEKDAY([Session Meeting (End Date)]@row) < 4), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 4, WEEKDAY([Session Meeting (End Date)]@row) < 4), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Thursdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 5, WEEKDAY([Session Meeting (End Date)]@row) >= 5), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 5, WEEKDAY([Session Meeting (End Date)]@row) < 5), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 5, WEEKDAY([Session Meeting (End Date)]@row) < 5), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Fridays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 6, WEEKDAY([Session Meeting (End Date)]@row) >= 6), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 6, WEEKDAY([Session Meeting (End Date)]@row) < 6), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 6, WEEKDAY([Session Meeting (End Date)]@row) < 6), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Saturdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 7, WEEKDAY([Session Meeting (End Date)]@row) >= 7), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 7, WEEKDAY([Session Meeting (End Date)]@row) < 7), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 7, WEEKDAY([Session Meeting (End Date)]@row) < 7), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Sessions
=IF(CONTAINS("Sunday", [Session (Days)]@row), [Total Sundays]@row, 0) + IF(CONTAINS("Monday", [Session (Days)]@row), [Total Mondays]@row, 0) + IF(CONTAINS("Tuesday", [Session (Days)]@row), [Total Tuesdays]@row, 0) + IF(CONTAINS("Wednesday", [Session (Days)]@row), [Total Wednesdays]@row, 0) + IF(CONTAINS("Thursday", [Session (Days)]@row), [Total Thursdays]@row, 0) + IF(CONTAINS("Friday", [Session (Days)]@row), [Total Fridays]@row, 0) + IF(CONTAINS("Saturday", [Session (Days)]@row), [Total Saturdays]@row, 0)
Jessica Selano | Selano Consulting
jessica@selanoconsulting.com
Answers
-
If you don't mind adding some helper columns this should work for you…
Add the following columns with the associated column formulas:
Total Sundays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) = 1, WEEKDAY([Session Meeting (End Date)]@row) >= 1), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 1, WEEKDAY([Session Meeting (End Date)]@row) < 1), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 1, WEEKDAY([Session Meeting (End Date)]@row) < 1), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Mondays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 2, WEEKDAY([Session Meeting (End Date)]@row) >= 2), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 2, WEEKDAY([Session Meeting (End Date)]@row) < 2), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 2, WEEKDAY([Session Meeting (End Date)]@row) < 2), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Tuesdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 3, WEEKDAY([Session Meeting (End Date)]@row) >= 3), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 3, WEEKDAY([Session Meeting (End Date)]@row) < 3), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 3, WEEKDAY([Session Meeting (End Date)]@row) < 3), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Wednesdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 4, WEEKDAY([Session Meeting (End Date)]@row) >= 4), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 4, WEEKDAY([Session Meeting (End Date)]@row) < 4), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 4, WEEKDAY([Session Meeting (End Date)]@row) < 4), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Thursdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 5, WEEKDAY([Session Meeting (End Date)]@row) >= 5), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 5, WEEKDAY([Session Meeting (End Date)]@row) < 5), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 5, WEEKDAY([Session Meeting (End Date)]@row) < 5), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Fridays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 6, WEEKDAY([Session Meeting (End Date)]@row) >= 6), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 6, WEEKDAY([Session Meeting (End Date)]@row) < 6), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 6, WEEKDAY([Session Meeting (End Date)]@row) < 6), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Saturdays
=IF(ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) = 1, IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) <= 7, WEEKDAY([Session Meeting (End Date)]@row) >= 7), 1, 0), IF(AND(WEEKDAY([Session Meeting (Start Date)]@row) > 7, WEEKDAY([Session Meeting (End Date)]@row) < 7), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 2, IF(OR(WEEKDAY([Session Meeting (Start Date)]@row) > 7, WEEKDAY([Session Meeting (End Date)]@row) < 7), ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7) - 1, ROUNDUP((NETDAYS([Session Meeting (Start Date)]@row, [Session Meeting (End Date)]@row)) / 7))))
Total Sessions
=IF(CONTAINS("Sunday", [Session (Days)]@row), [Total Sundays]@row, 0) + IF(CONTAINS("Monday", [Session (Days)]@row), [Total Mondays]@row, 0) + IF(CONTAINS("Tuesday", [Session (Days)]@row), [Total Tuesdays]@row, 0) + IF(CONTAINS("Wednesday", [Session (Days)]@row), [Total Wednesdays]@row, 0) + IF(CONTAINS("Thursday", [Session (Days)]@row), [Total Thursdays]@row, 0) + IF(CONTAINS("Friday", [Session (Days)]@row), [Total Fridays]@row, 0) + IF(CONTAINS("Saturday", [Session (Days)]@row), [Total Saturdays]@row, 0)
Jessica Selano | Selano Consulting
jessica@selanoconsulting.com
-
Worked perfectly.
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