The method of converting the measures of length from one unit to another is called length conversion. In the metric system, units for length are kilometres (km), metres (m), centimetres (cm), and so on. The conversion of these units from one unit to another is referred to as the conversion of units for length.
The foreign exchange market is a global decentralized or over-the-counter market for the trading of currencies. This market determines foreign exchange rates for every currency. It includes all aspects of buying, selling and exchanging currencies at current or determined prices.