Formulas for auto creating start time / end time based on duration - Event Runsheet

Hi, I am wanting to create an event runsheet.

I have a formula that automatically calculates the duration from start time / End Time but Im having trouble figuring out how to automatically calculate Start Time / End Time from Duration which is more Ideal.

I could enter a Start Time & End Time in the parent row and then in all child rows i just want to enter duration so the Start Time / End Time automatically calculate with formulas.

i know formulas to accommodate both 12 hour and 24 hour time are huge so i am happy to just use 24 hour time with colon separation (14:00) if thats more achievable. I would enter duration in minutes and it doesnt go over a day.

If anyone knows a formula for this it would be much appreciated

Kind Regards,




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