Thanks to this Additional Units modification, you can set the mass/volume unit. You can also add a new unit of measure according to your needs.
You can open the menu for managing units of measurement using the button in the general settings.
By default, the following units of measurement are added: cubic meter, gallon, pound, kilogram.
ATTENTION!
The mod formats the fill level into the correct units as much as possible, unfortunately, some of them cannot be formatted, so there will be "places" in the game where the fill level will be formatted into the main game unit.