Value of $100 in 1916, adjusted to 1940

What happened to prices between 1916 and 1940

Between 1916 and 1940, the Consumer Price Index went from 10.9 to 14. Cumulatively, prices increased 28.4%, which works out to an average of 1.05% per year. Put differently, a dollar in 1916 bought what $0.78 buys in 1940.

1916 was when World War I first showed up clearly in American price tags. Consumer prices rose 7.9% for the year, easily the sharpest increase since the Bureau of Labor Statistics’ CPI history begins in 1913, as factories ran flat out to fill steel, munitions, and food orders from Britain and France. Railroad workers felt the squeeze from rising living costs enough to threaten a nationwide strike; Congress headed it off in September with the Adamson Act, which set an eight-hour standard workday for interstate rail employees, the first federal law of its kind covering private-sector hours. Washington was also preparing more directly for war: the National Defense Act, signed in June, expanded the Army and National Guard and funded new government-owned munitions plants, adding another source of demand to an economy already running hot. Woodrow Wilson won re-election in November largely on having kept the country out of the fighting so far, a promise that would not survive the following spring. A first-class stamp still cost 2 cents, one of the few prices that had not yet moved.

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The destination year: 1940

Consumer prices rose 0.7% in 1940, snapping 1939’s decline and marking the first increase since 1937. The gain was modest, and the CPI still stood 18.1% below its 1929 peak, a reminder of how far the recovery from the Depression’s trough had left to go even as defense orders from Britain and France began reaching American factories. War was already reshaping domestic policy well before it touched American soil. Congress passed the Selective Training and Service Act that September, the country’s first peacetime draft, requiring men aged 21 to 35 to register and authorizing the induction of up to 900,000 men a year, more than a year before Pearl Harbor. That November, Franklin Roosevelt won an unprecedented third term, defeating Republican Wendell Willkie after campaigning on keeping the United States out of the war then consuming Europe and Asia. The promise would not hold much longer: within two years, wartime demand would push consumer prices up faster than at any point since the aftermath of World War I. First-class postage held at 3 cents, and the federal minimum wage stayed at 30 cents an hour, the level set the previous October under the Fair Labor Standards Act.

More about inflation in 1940 →