how do i calculate fields of a project

[ibson]

how do i calculate fields of a project

[Kurt Klinner]

@ibson 

Welcome to the Atlassian community

i would suggest to have a look to a available solution at the maketplace like

https://marketplace.atlassian.com/apps/27136/jira-misc-custom-fields?hosting=server&tab=overview

in addition https://confluence.atlassian.com/display/JIRA041/How+to+create+a+new+Custom+Field+Type?_ga=2.167959465.901906150.1567371942-2130411170.1567371942 could be interesting for you

All the best

Kurt

[Nic Brough -Adaptavist-]

Have a look at the range of scripting and automation apps available in the marketplace.  Some offer simple but limited calculated fields, some allow much more powerful calculations and functions like being able to add fields in places the more simple ones can't.