The United States stopped dollar-to-gold conversion for foreign official holders in 1971.

Under the Bretton Woods monetary system, the United States maintained an official gold price of $35 per troy ounce. Other participating countries generally managed their currencies against the dollar. Foreign monetary authorities could, under the system’s arrangements, present dollars for conversion into American gold, making the dollar the central link between currencies and bullion.

That arrangement became harder to sustain as dollar claims held abroad grew relative to the American gold available to support them. Holders needed confidence that conversion would remain credible. Yet an attempt by many official holders to convert at once would place the reserve position under severe pressure, creating an incentive to act before others did.

Nixon announced the suspension in a televised address alongside other economic measures, including wage and price controls and an import surcharge. Although presented as temporary, the gold window did not reopen on the old basis. The announcement therefore became a decisive turning point in the breakdown of the postwar exchange-rate system.

The Bretton Woods agreements were negotiated in 1944, before the Second World War ended. Their designers wanted international monetary stability without simply recreating every feature of the earlier gold standard. The dollar’s special position reflected the United States’ economic strength and substantial gold holdings.

The system did not promise that everyone, everywhere, could exchange any banknote for gold. American domestic monetary arrangements had already changed dramatically in the 1930s. By 1971, the important remaining conversion commitment was international and official. Confusing those two settings makes the Nixon announcement sound like a sudden cancellation of an ordinary retail service.

During the postwar decades, dollars also became essential reserves and working balances for international trade. Supplying the world with dollars helped the system function, but the accumulation of claims could undermine confidence in their gold backing. This tension is often discussed as the Triffin dilemma, after economist Robert Triffin.

Closing the window did not instantly produce today’s exchange-rate arrangements. Governments first tried to repair the system. The Smithsonian Agreement in December 1971 adjusted currency relationships, but the effort did not establish lasting stability. By 1973, major currencies had moved toward floating against one another.

After the break, a dollar’s value no longer rested on that official promise to deliver a fixed quantity of gold to eligible foreign holders. This does not mean it became valueless. Its purchasing power and exchange value depended on monetary policy, economic conditions, demand for dollar assets and confidence in American institutions.

Nor did gold disappear from central-bank balance sheets or from financial markets. The change concerned the rule connecting an official dollar price to conversion. Separating gold ownership, market gold prices and official currency convertibility is essential to understanding what actually ended in August 1971.

Closing the gold window changed an international official promise, not the physical contents of an ordinary wallet. The distinction matters because dollar banknotes continued to exist and circulate. What ended was a particular route through which foreign monetary authorities could claim American gold under the postwar system.