Here are some other units of mass in the metric system, with their relationships to grams:

* Kilogram (kg): 1 kilogram = 1000 grams

* Milligram (mg): 1 gram = 1000 milligrams

* Metric ton (t): 1 metric ton = 1,000,000 grams

The most common unit for everyday measurements is the kilogram, while grams are used for smaller quantities, and milligrams for even smaller amounts.