The metric system is used to measure the length, mass or capacity of an object. Length is measured in millimetres (mm), centimetres (cm), metres (m) or kilometres (km). Mass or weight is measured in ...

Units from the metric system can be used to describe the mass, volume or length of an object. Mass is measured in grams (g) and kilograms (kg). Volume is measured in millilitres (ml) and litres (l).

Most of the world measures things using the metric system. Learn more about this standard of measurement and how it is getting more and more accurate.

Confoundingly, the U.S. has stood on the sidelines for centuries as the rest of the world has adopted the metric system as its standard not only in science but in everyday life. (Meanwhile, we ...

In one of the math classes I teach, there are adults from China, Haiti, Ethiopia, Brazil, Colombia, and an array of other countries. The group is about as diverse as you can imagine, but the one thing ...