Foreign currency measurement is the accounting method used by an organisation to measure foreign transactions in their functional currency.International businesses that pay suppliers in foreign currencies and/or sell their products in overseas markets need to translate those costs and revenues into their functional currency in their financial statements.Since currencies fluctuate continuously, these companies are subject to transaction risks. The variations of the exchange rate in the different moments when foreign currencies are exchanged, generate differences in the amount of functional currency needed to pay suppliers (in the case of costs) or received from sales in overseas markets. These differentials are called transaction gains and losses and are included in the company's net income statements.