The Office of Weights and Measures within the Commerce Department’s National Institute of Standards and Technology publishes standards for English and metric weights and measures.

The metric system is used to measure the length ... or kilometres (km). Mass or weight is measured in grams (g) and kilograms (kg). Capacity is measured in millilitres (ml) ...

A description of the measures used for weight, length and volume in the past, such as cubits, spans, feet, grains of barley, stones and pints. The metric system was introduced to standardise ...

After the revolution of 1789, French citizens sought uniform weights and measures throughout the nation ... It survives today as the metric system.