Why doesn't the U.S. use the metric system?


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Longtime readers of Today You Should Know may recognize this question โ€“ it's a repeat! I just returned from a fantastic trip seeing lovely people and climbing beautiful mountains. Not one word was written as I focused on being present.

Hope you enjoy (re)learning about why the U.S. eats quarter pounders and not ... 113 grammers ๐Ÿ”. Back next week with a new curious question.

๐Ÿ‘‹ Caitlin

Why doesn't the U.S. use the metric system?

๐Ÿ““ The short answer

Pirates are a big reason why the United States never started using the metric system when other countries began using it. And now the U.S. doesnโ€™t use the metric system because of the immense upfront cost of switching and a feeling of patriotism for the current system.

๐Ÿ“š The long answer

This question is best answered in two parts: why didn't the U.S. use the metric system to begin with, and why hasnโ€™t the U.S. switched to the metric system?

Why didn't the United States use the metric system to begin with?

Pirates. Literally pirates are a big reason why the U.S. never started using the metric system. I'll explain.

The metric system was invented by the French in order to standardize measures, which often differed not only from country to country but from town to town. After many attempts, the new system was finally put into place after the French Revolution. Libertรฉ, รฉgalitรฉ, fraternitรฉ (and standardizationรฉ)!

Around the same time, the brand new United States was also dealing with the flaws of their inherited British system of measurements. Thomas Jefferson, a fan of French scientific ideas, lobbied for the U.S. to implement the new system and sent for the French scientist Joseph Dombey to convince others to switch to a more logical system of measurements.

But there was one problem: Joseph Dombey's ship had blown off course and been captured by pirates. He was held prisoner in the Caribbean until he died. Back in United States, people were already used to the British system and so they stuck with ounces and pounds, inches and feet.

Why hasnโ€™t the U.S. switched to the metric system?

To start with, the U.S. actually does (kind of) use the metric system: Americans drink 2-liter soda bottles, run 5Ks, and take 100mg of aspirin. In 1975, Congress passed the Metric Conversion Act, which declared metric as the preferred system of the United States, but President Ford emphasized that conversion was "completely voluntary."

"It is important to stress that the conversion contemplated in this legislation is to be a completely voluntary one. The Government's function, through a U.S. Metric Board that I shall appoint, will be to coordinate and synchronize increasing use of metric measurement in the various sectors of our economy."

While U.S. Metric Board and other groups worked to educate and promote metrication, the absence of mandate (or even a deadline) in the bill to made the push ineffective.

Some companies, like Coca Cola and Pepsi, figured it was a matter of time before all products would be sold by the metric measurements so they sold 2-liter bottles instead of half gallon bottles.

So the U.S. has a patchwork of different measurements โ€“ why hasn't it made the switch to purely using the metric system?

Reason #1: It would cost a lot of money and effort for the U.S. to switch to the metric system.

If we were to make the switch to metric purity, there would have to be a huge upfront investment. Textbooks would need to be reprinted, road signs replaced, etc. The private sector would also need to spend a great deal of money on the switch, and it's easy to predict that there would be intense lobbying to stick with the system we have.

In fact in the 1870s, industrialists who had already stocked their factories with non-metric system equipment used their influence to thwart an effort to make the switch to the metric system.

Reason #2: Some people feel that the metric system is โ€œanti-American.โ€

A sizable portion of Americans have an affinity for the system because of a feeling of patriotism. Anti-metric sentiment stems from a desire for America to stand apart from the rest of the world, perhaps as a display of pride and nostalgia for the current system.

Shortly after the Metric Conversion Act was passed, Senator Chuck Grassley declared, "Forcing the American people to convert to the metric system goes against our democratic principles."

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While the rest of the world may view the U.S. clinging to its current system as penny wise and pound foolish, America has decided that its streak of individualism extends to the yardstick.

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All my best,

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โ€‹Sources for this week's newsletterโ€‹



๐ŸŒ Wikipedia article of the week

โ€‹Naciremaโ€‹

"Nacirema ("American" spelled backwards) is a term used in anthropology and sociology in relation to aspects of the behavior and society of citizens of the United States. The neologism attempts to create a deliberate sense of self-distancing in order that American anthropologists might look at their own culture more objectively... The original use of the term in a social science context was in "Body Ritual among the Nacirema", which satirizes anthropological papers on "other" cultures, and the culture of the United States."


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