(If your measuring tools have both metric and standard volumes marked, the metric conversions might not be an issue.) This ...

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).

Despite what you may think, the quantity measured in kilograms, grams, pounds and stone is mass, not weight as most people mistakenly call it. Weight is measured in Newton.