Can I Change the UOM on an Inventory Item?
It depends on whether the item has been used on any jobs.
Not yet used on any jobs: You can edit the UOM directly in inventory settings.
Already on existing jobs (locked): The UOM cannot be edited directly. Use the workaround below.
How to Edit UOM on an Unlocked Item
Go to Inventory.
Find your product and open it.
Update the Unit of Measure field.
Click Save.
Workaround for Locked Items
If the item is locked because it's already been used on jobs:
Duplicate the product — find the item, click Duplicate, and give it a new name (e.g., append "v2" or update the name to reflect the correct UOM).
Set the correct UOM on the duplicate.
Mark the original as invisible so it no longer appears in product searches. It will remain on existing jobs for historical accuracy.
Use the new item going forward.
📎 Setting up UOM during import? See Inventory Import: Setting Up Products With Different Purchase and Selling Units.