What Was the Bretton Woods System?

Most people go to a mountain resort to forget about money for a week. In July 1944, three and a half weeks after D-Day, 730 delegates from 44 countries went to one in New Hampshire to redesign it, and stayed three days past checkout. What they built works a lot like a hotel casino. Every table in the world plays with the same chips. The house keeps the gold in a cage at the back. And a sign on the wall says the cage will swap 35 chips for one ounce, any time, no questions asked.

The Bretton Woods system was the set of money rules agreed at Bretton Woods, New Hampshire, in July 1944. Other countries fixed their currencies to the US dollar, and the US promised that foreign governments could swap their dollars for gold at $35 an ounce. It also created the International Monetary Fund and the World Bank. It ran at full strength from 1958 and ended when the US stopped paying out gold on August 15, 1971.

Already know how the peg worked? Skip to where America’s gold went.

What was the Bretton Woods agreement?

The hotel was the Mount Washington, and the meeting had a name only a committee could love: the United Nations Monetary and Financial Conference. The war was still on. The delegates had watched the 1930s, when countries took turns making their own money cheaper to win export sales, like neighbors at a yard sale undercutting each other until nobody makes a dime. They wanted rules that would stop that.

The rules, as the Federal Reserve’s history sums them up, were short. Each country fixed its currency to the US dollar and kept it within 1% of that rate. The dollar was fixed to gold at $35 an ounce. Foreign governments and central banks could hand dollars to the US Treasury and get gold back at that price. Two new institutions would keep the tables running: the International Monetary Fund, to lend to countries short of dollars, and the International Bank for Reconstruction and Development, now the World Bank, to pay for rebuilding.

That is the casino. The dollar is the chip every table in the world accepts. The US Treasury is the cage at the back with the gold. The $35 sign is nailed to the wall.

One detail matters more than it looks: only governments could walk up to the cage. Americans had been barred from owning gold bullion since 1933, so an ordinary American holding a $20 bill could not cash it in at all. They were allowed in the casino. They just weren’t allowed near the cashier.

The conference was meant to end on July 19. It ran to July 22 to finish the World Bank, which anyone who has ever booked a three-day work retreat will recognize as the hotel bar winning.

Into the weeds: the plan that lost

The British economist John Maynard Keynes wanted a world central bank, the International Clearing Union, issuing its own money, the “bancor,” with penalties for countries that piled up surpluses as well as for those that ran deficits. The US Treasury’s Harry Dexter White wanted a smaller fund built from gold and existing currencies. The US was the world’s largest economy and the main lender, so the final deal looked much more like White’s plan, with a few concessions to Keynes. The fund’s original quotas totaled $8.8 billion, and members paid a quarter of their share in gold or dollars and the rest in their own currency.

How much gold did the US have under Bretton Woods?

An enormous amount. When the delegates sat down in July 1944, the US monetary gold stock was about $21.1 billion at $35 an ounce, according to the Federal Reserve’s figures on FRED. It kept growing after the war and peaked in September 1949 at about $24.6 billion. The Fed’s history says the US held about three-quarters of the world’s official gold.

Turn that peak into metal and it comes to about 704 million troy ounces, or roughly 21,900 tonnes. Gold is so dense that the whole pile would fit in a cube about 34 feet on a side, about as tall as a three-story house. A three-story house of solid gold, with no doors, no windows and a security guard who never gets a lunch break. That cube was the cage behind every chip on Earth.

Today the US Treasury holds 261,498,926 ounces, about 8,100 tonnes, according to its monthly gold report. That’s a cube about 25 feet on a side. The house is still standing, one floor shorter, and about 63% of the 1949 gold is gone. It’s the family home after the kids moved out and took most of the furniture. The parents still call it “the big house.” A real estate listing would call it cozy.

Why did Bretton Woods take until 1958 to work?

Because after the war almost nobody had any chips. Europe needed American food, fuel and machines, and it needed dollars to pay for them. Economists at the time called it the “dollar shortage.” The US handed out chips on purpose. From 1948 to 1954 it gave 16 Western European countries about $17 billion in grants, most of it through the Marshall Plan. At $35 an ounce, that was enough dollars to claim about 69% of the gold America held at its 1949 peak.

Meanwhile most countries kept tight rules on swapping one currency for another. The casino was open, but most players could only cash out at their own table. Western European currencies finally became freely convertible for trade in December 1958, and the Fed’s history dates the system’s real start to that year.

Count it up. The delegates signed in July 1944. The system was fully running by the end of 1958, fourteen years later, and it was over in August 1971, twelve years and eight months after that. Bretton Woods spent longer warming up than it spent running, like a gym membership that takes fourteen years to activate and gets canceled during the free smoothie. The treadmill was barely warm.

Where did America’s gold go?

Out the cage, a little every day. From the September 1949 peak to December 1970, the US gold stock fell from about $24.6 billion to about $11.1 billion. That is about 387 million ounces, or 12,000 tonnes, gone in a little over 21 years.

Spread evenly, the US lost about 1.5 tonnes of gold a day, every day, for 21 years. That’s roughly a small car’s weight in gold leaving the vault each morning, weekends and Christmas included. The guards could have set their watches by it. At the October 24, 2026 price of about $3,997 an ounce, the gold that left between 1949 and 1970 would be worth about $1.55 trillion.

The worst single year was 1958, the year the casino fully opened. The gold stock dropped by about $2.2 billion, close to 2,000 tonnes, or about five and a half tonnes a day. That’s roughly an elephant’s weight in gold walking out of the vault every day for a year, and nobody asked the elephant for a receipt.

By 1960 there were more dollars in foreign hands than gold in the cage. Economic historian Barry Eichengreen found that 1960 was the first year foreign claims on the US, private and official, were bigger than its monetary gold. The markets noticed fast. On October 20, 1960, gold traded at $40 an ounce in London, 14% above the price on the sign.

That is the moment every casino dreads: the poker players doing arithmetic. If the cage has fewer ounces than there are chips, the only smart chip is the one you cash in first.

What was the Triffin dilemma?

It was the trap built into the casino’s floor plan. The world’s trade was growing, and every country wanted more dollars to trade with and to keep as savings. The only way the world could get more dollars was for the US to send out more than it took in: buying imports, lending abroad, paying for troops and aid. So the system needed the US to keep handing out chips.

But each new chip made the $35 sign a little less believable. The gold in the cage wasn’t growing to match. Stop handing out chips, and the tables run short and trade slows. Keep going, and one day the players want gold the cage doesn’t have. The economist Robert Triffin laid out this trap in 1960, more than a decade before it broke, which is a long time to watch a casino run low on the one thing it promised.

Into the weeds: why holding dollars beat holding gold, for a while

In the 1950s a dollar could be even better than gold for a central bank. Dollars could sit in US Treasury bills and earn interest. Gold earns none. As long as everyone trusted the $35 promise, holding dollars meant collecting interest on something as good as gold, a savings account that was also a gold bar. The catch: the promise held only while most holders didn’t test it.

What did the US do to keep gold at $35 an ounce?

Almost everything except change the sign. In March 1962 the Fed began setting up currency swap lines with foreign central banks, nine of them by the end of that year, so they could hold dollars without the risk of a loss and wouldn’t ask for gold. The government restricted American investment abroad and bank lending overseas. West Germany agreed not to buy gold from the US.

The biggest effort was the London Gold Pool. Starting November 1, 1961, the US and seven European central banks agreed to sell gold into the London market whenever the price rose above $35, to keep the outside price matched to the sign. Over its life the pool sold about $2.5 billion of gold, and the US supplied about $1.6 billion of it, according to Eichengreen’s count. That’s about 1,400 tonnes of American gold sold at $35 an ounce. At the October 24, 2026 price it would be worth about $183 billion. It’s like keeping the neighborhood gas price at 35 cents by quietly filling everyone’s tank from your own garage, then wondering why the garage is empty.

France pulled out of the pool in 1967 and kept converting dollars to gold. Britain devalued the pound that November. In March 1968 the run got so heavy that London closed its gold market for two weeks, the pool ended, and on March 18, 1968 Congress dropped the rule that US currency be backed 25% by gold. After that there were two gold prices: $35 between governments, and whatever the market said for everyone else. The sign on the wall stayed up. It just applied to a smaller and smaller room.

Why did Bretton Woods end?

Because the cage ran low and the players kept coming. In the summer of 1971 foreign governments were lining up to swap dollars for gold, and on August 11 Britain asked for $3 billion of it, about 2,700 tonnes’ worth at $35. On August 15, President Nixon announced that the US would stop swapping dollars for gold “temporarily.” Our piece on why the US left the gold standard in 1971 tells that weekend in detail.

There were two attempts to put the sign back up at a new number. In December 1971 the Smithsonian Agreement raised the official price to $38 an ounce. In February 1973 the US raised it again, to $42.22. A few weeks later, in March 1973, the major currencies stopped trying to hold fixed rates and began to float, as the State Department’s historians describe it. The rules were formally rewritten at a 1976 IMF meeting in Jamaica.

The US Treasury still values its gold on its books at $42.22 an ounce, the last number ever painted on the sign. The cage window has been shut for over half a century, and the price on the wall hasn’t been touched since 1973, like the price tag still stuck to a sweater from a store that closed before you were born.

What was a dollar worth under Bretton Woods, and what is it worth now?

At $35 an ounce, a dollar was legally 888.67 milligrams of gold, a little under a gram, about the weight of a paper clip. At the October 24, 2026 price of about $3,997 an ounce, a dollar buys about 7.8 milligrams, roughly a third of a grain of rice. The dollar now buys about 114 times less gold than the sign promised.

Prices in general rose too, so this isn’t all gold’s doing. By the consumer price index, the $35 of 1944 equals about $665 today. Yet an ounce costs about six times that, even after inflation. Measured at the grocery store, the dollar lost about 95% since 1944. Measured in gold, it lost 99.1%, a 99% off sale nobody signed up for, on the thing already in your wallet. Our dollar value by year calculator runs both measures for any year you like.

What did Bretton Woods mean outside the US?

For most of the world it meant a number that didn’t move for years, then moved all at once. Here are some of the pegs, from the rate history Wikipedia compiles, next to the European Central Bank’s reference rate on October 30, 2026:

Country	Under Bretton Woods	October 30, 2026
Japan	¥360 per dollar, April 1949 to 1971	¥157.25
United Kingdom	$4.03 per pound, then $2.80 (1949), then $2.40 (1967)	$1.34
West Germany	4.20 marks per dollar, then 4.00 (1961), then 3.67 (1969)	about 1.75 marks’ worth of euros
Switzerland	4.373 francs per dollar throughout	0.82 francs
Canada	floated 1950 to 1962, then pegged at US$0.925 until 1970	US$0.72
Mexico	12.50 pesos per dollar, 1954 to 1976	18.91 pesos

Japan’s rate sat at 360 yen for 22 years, long enough for a baby born the day it was set to graduate from college, still paying the same price for a dollar. Switzerland’s franc, fixed at 4.373 to the dollar, now trades at about 0.82. A dollar buys about a fifth as many Swiss francs as it did when the sign went up.

Countries whose money was tied to the pound got the pound’s bad news by mail. In 1949 most of the sterling area, including Australia, New Zealand, Ireland, India and South Africa at the time, devalued alongside Britain; in 1967 many did not, according to the history of the sterling area. Canada went its own way earlier than anyone, letting its dollar float in 1950, a rebel move in a casino where every other table played by the house rules.

Was Bretton Woods a good system?

Here is the strongest case for it, stated fairly. The Bretton Woods years ran alongside the long postwar boom in Western Europe and Japan, trade grew quickly, and the competitive devaluations of the 1930s mostly stopped. Many economists argue the gold link was the system’s weak part rather than its strength, because a fixed amount of gold could never keep up with a growing world. Floating currencies since 1973 have carried far more trade than Bretton Woods ever did.

All true. Now the part that matters for anyone holding gold. The promise at the center of the system worked only as long as nobody used it. Governments that took the US at its word and cashed in early, France most of all, got ounces. The ones that held dollars as asked were paid back, in effect, at about one-hundred-fourteenth of the gold. And the rules were changed at a weekend retreat and a handful of meetings, with no vote by anyone holding the chips.

That is why people still keep physical gold and silver: an ounce in your hand has no cage, no cashier and no sign that can be repainted. Bretton Woods was a casino with the best manners in history. It still had a house, and the house still closed the window. The chips work at every table in the world today, and the only players who left with gold were the ones who cashed in before the window shut.

Sources

• The conference (730 delegates, 44 nations, July 1 to 22, 1944, extended from July 19), the IMF quotas and the Keynes and White plans: Wikipedia, Bretton Woods Conference; Federal Reserve History, “Creation of the Bretton Woods System”.
• The 1% band, the $35 price and the three-quarters share of official gold: Federal Reserve History; Federal Reserve History, “Nixon Ends Convertibility”.
• The 1958 start, the swap lines and the end of the gold pool: Federal Reserve History, “The Bretton Woods System Launched”; Federal Reserve History.
• US monetary gold stock, July 1944 to December 1970: FRED M1476BUSM027NNBR (1914 to 1946) and FRED M1476CUSM144NNBR (1947 to 1970), Federal Reserve Bulletin data via the NBER.
• US Treasury gold today, 261,498,926 fine troy ounces on August 31, 2026: US Treasury, Status Report of US Government Gold Reserve.
• Foreign claims exceeding US gold in 1960, and the US share of gold pool sales ($1.6 billion of $2.5 billion): Barry Eichengreen, “From Benign Neglect to Malignant Preoccupation,” NBER Working Paper 7630, 2000.
• Marshall-era grants ($17 billion, 1948 to 1954), the gold pool dates, March 1968, the Smithsonian price of $38 and the pegged rates: Wikipedia, Bretton Woods system; Wikipedia, London Gold Pool.
• The 1973 float: US Office of the Historian. Canada’s float and repeg: Wikipedia, Canadian dollar. Mexico’s 12.50 pesos: Wikipedia, Mexican peso. The sterling area: Wikipedia, Sterling area.
• Exchange rates on October 30, 2026: European Central Bank reference rates via Frankfurter. Gold price, $3,996.90 an ounce on October 24, 2026: gold-api.com. Consumer prices: BLS CPI-U, 1944 average 17.6, 2026 estimate 334.4.

Figures read October 31, 2026; the gold price is the site’s October 24, 2026 pin. Derived figures (ounces, tonnes, cube sizes, tonnes per day, today’s values, the milligrams per dollar and the 14-year and 12-year spans) are our own arithmetic from the sources above, at 31.1035 grams per troy ounce and 19.32 tonnes per cubic meter of gold.

Questions people actually ask

What was the Bretton Woods system in simple terms?

It was a set of rules agreed in July 1944 in which other countries fixed their currencies to the US dollar and the US promised to swap dollars for gold at $35 an ounce for foreign governments. It also created the International Monetary Fund and the World Bank.

When did the Bretton Woods system start and end?

The agreement was signed on July 22, 1944, and the system became fully operational in December 1958, when Western European currencies became freely convertible. It ended when the US stopped swapping dollars for gold on August 15, 1971, and fixed exchange rates were abandoned in March 1973.

Was the dollar backed by gold under Bretton Woods?

Yes, for foreign governments and central banks, which could exchange dollars for gold at $35 an ounce. Ordinary Americans could not, because owning gold bullion had been illegal in the US since 1933.

Why did the Bretton Woods system fail?

The world needed more dollars every year, and the US supplied them by spending more abroad than it earned, but its gold did not grow to match. By 1960 foreign claims on the US exceeded its gold, and from 1949 to 1970 its gold stock fell by about 12,000 tonnes. In August 1971 the US stopped paying out gold.

What is the Triffin dilemma?

It is the trap described by the economist Robert Triffin in 1960: the country that issues the world’s reserve currency has to keep sending it abroad so the world has enough, but the more it sends, the less believable its promise to redeem that currency becomes.

How much gold did the US have under Bretton Woods?

The US monetary gold stock peaked in September 1949 at about $24.6 billion at $35 an ounce, about 704 million ounces or 21,900 tonnes. By December 1970 it had fallen to about $11.1 billion. The US Treasury held 261,498,926 ounces, about 8,100 tonnes, on August 31, 2026.

What replaced the Bretton Woods system?

Floating exchange rates. After the US stopped redeeming dollars for gold in 1971 and a short-lived attempt to reset the rates at the Smithsonian Agreement, the major currencies began floating against each other in March 1973. The change was formalized at an IMF meeting in Jamaica in 1976.

What was the bancor?

The bancor was the international currency proposed by the British economist John Maynard Keynes before the 1944 conference, to be issued by a world clearing bank. The US preferred a smaller fund built from gold and existing currencies, and the bancor was never created.

Did the IMF and the World Bank come from Bretton Woods?

Yes. The 1944 conference created the International Monetary Fund and the International Bank for Reconstruction and Development, which is now part of the World Bank Group. Both still exist, even though the fixed-rate system they were built to support ended in the early 1970s.