How to summing estimations from task to epics in a Gantt Chart

[Christian Silva]

I can not sum estimations from tasks to epics in a Gantt Chart

I would like to have a total estimation per epic, but epics are not summing estimations from task and subtask, It has to be done manually and it is prone to errors if I decide to change the estimation of any of the child task and subtask and if I forget to update manually the epic estimation.

It is not a Jira automatic feature, How I can automate or program it? 

I would like to know how to do it, maybe the best example is when you are working in excel and you can add formulations to the cells and sum numeric values ​​from the cells

[Hanna]

Dear Christian,

> It is not a Jira automatic feature, How I can automate or program it?
WBS Gantt Chart for Jira doesn't have any features as like auto calculation for the fields(ex. ordinal estimates). As you mentioned, Jira doesn't have any features too.

I asumme that Any third party apps (ex.https://marketplace.atlassian.com/apps/1211836/automation-for-jira-server-lite?hosting=server&tab=overview) can calculate them.
I hope to have given you some help in the meantime.

Hanna,