We have a project to track progress of various events, including attendee numbers. Does anyone know of a way to use these custom field values and automatically update the custom field in a “Total number” task at the bottom of the project? I.e. 5 tasks with the custom field “attendee #” and then a 6th task at the bottom with the total number. Would love to have this number automatically updated after changing one of the tasks above.
Calculate custom field value
Hi
That’s not exaclty what you want, but if you multiselect the 5 tasks, then Asana automatically sums the custom fields on the window that opens on the right.
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Not possible yet, the sum is the only available computation and only if you multi select. I did develop something called Mathana a few years back but it never made it to production 
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I would love to see this feature as well!
With the plugin we made it much easier to to calculate tasks and points for the list and a board view https://www.boostlabs.com/improve-your-teams-agile-process-in-asana/
The plugin is open sourced so you can tune that to your needs and calculate anything.
Bug reports and feature suggestions are welcome: https://github.com/vkorobov-boostlabs/asana-counter
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We just obtained licenses for Asana Premium and we’d love this ability to calculate story points for Scrum velocity tracking.
Have a look at the Scrum section of The ultimate guide for doing things with Asana you might find help.
we are looking for the ability to do basic calculations (addition and multiplication) in Asana forms. Do you offer a solution?