There are many units:
Liters, cubic centimeters, gallons, teaspoons, tablespoons, fluid ounces, cubic inches, quarts, cups, cubic meters, cubic kilometers, barrels, and many more obscure units.
A liter is typically used to measure liquid capacity, while a gram is used to measure mass. If you want to measure the volume of a liquid, you would use liters. If you want to measure the weight of an object, you would use grams.
Fluid ounce is an old-fashioned unit, used to measure volume, or capacity.
Gallon
Liters, milliliters.
Gallons
kg L. l.
Liter
Ancient Greek is the basic unit used to measure liquid. Ancient Greek can change location and epoch.
I assume you mean volume rather than capacity. The milliliter would be the best answer. It is 1 thousandth of a liter.
The metric unit used most often to measure liquids is the liter (L). It is a unit of capacity and is commonly used in everyday life and in the scientific community.
The most appropriate unit of measurement to measure the capacity of a bathtub is liters (L) or gallons (gal). These units are commonly used to measure volumes of liquids, which is relevant to the amount of water a bathtub can hold. Cubic meters (m^3) could also be used for larger bathtubs or industrial applications where a greater volume is needed.
Megabyte, Gygabyte, and Terabyte.