The level of the U.S. Dollar Index indicates the average value of the dollar relative to the agreed 1973 base of 100.00, when major trading nations agreed to allow their currencies to float freely against each other. It is computed using the weighted average of currencies with a highly developed market. The current basket of currencies used to calculate the U.S. Dollar index includes twenty countries: the fifteen nations in the Euro Zone and five other countries who make up the basis of global trade with the United States. The currencies and their relative weights are as follows:
| Currency | Weight |
| Euro | 0.576 |
| Japanese Yen | 0.136 |
| British Pound | 0.119 |
| Canadian Dollar | 0.091 |
| Swedish Krona | 0.042 |
| Swiss Franc | 0.036 |
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