The metric system is on track for a mass makeover. In an effort to provide accurate measurements at all scales, scientists are preparing to redefine four basic units by the end of 2018. The shift ...

Find out what a metric measurement is and learn the different units of measurement in this BBC Bitesize maths guide.

Now it is the turn of the units of mass (kilogram), current (ampere), temperature (kelvin) and the amount of a chemical substance (mole) to be redefined so that they too can, in theory, be ...

Before we started using metric measurements, we used imperial measurements with feet and pounds. Find out more in this Bitesize Primary KS2 Maths guide.