Does JIRA auto-calculate the ideal length of Sprint based on estimates ! ? ?

[Andy - PTC Redundant]

I just set-up my sprint perfectly... correct versions, epics, User Stories, Tasks, estimates, sub-tasks (where applicable and with estimates) and then hit start sprint.

I had estimated, based on resource planning, to need 11 work days to complete, including Retrospective... however, instead of Sept 3rd, I saw Sept 7th.

Is JIRA therefore auto-calculating sprint lengths based on the estimates??

[Please note, I did not select anything from the drop-down menus myself. This is the screen I was presented once it popped up]

[Jorge_de_Carlos]

Hi @Andy - PTC Redundant,

Estimations don't affect to Sprint lenghts. Users have to configure it.

You have to use "Start date-End date" to make the Sprint planning.

Estimation depends on each user. 6 SP can be 6 days for you...6 hours for me...

Regards!

[Andy - PTC Redundant]

Thanks @Jorge_de_Carlos! Fast reaction :oD

So pleased to hear user have to configure, that's logical. Similar question slightly varied: Any idea why the dates are filled in automatically? 

[Jack Brickey]

Unless something has changed the duration is defaulted to previous sprint duration. I don't know what the default is for the "first sprint" but I expect it is just a default. It would be interesting to see if the sprint that is about to start is different than previous.

[Andy - PTC Redundant]

That's an interesting point @Jack Brickey. Got another project about to start a new Sprint. I'll keep an eye out on that one. Thanks!

[Gregor Kasmann_Actonic]

I suppose everything much simpler. Jira just trying to round total estimated time of the Sprint to the integer number of weeks. You have 11 days - 5 work days a week, so it will be 2 weeks and one day. Jira rounds it to 3 weeks.

[Andy - PTC Redundant]

Thanks @Gregor Kasmann_Actonic.  Appreciated the rapid response. That's an interesting point you make there. Is that a known function in Jira; ever had it confirmed by someone from Atlassian?