Veritasium explains that the US signed the Metre Convention in 1875 and that all US customary units are officially defined in terms of metric standards. It also touches on the standard kilogram.
Why Hacker News points people here: HN commenters link it to show that the US is effectively metric because its customary units are defined from SI.
“The US system (pounds) are defined by a conversion from the metric system.”
Explains that US customary units are defined from metric ones
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As you can see here. In Veritasium American kilogram.The US system (pounds) are defined by a conversion from the metric system. this video
Cites itchiphJul 2017
“And it turns out that our common units are defined in terms of the metric system.”
Shows US common units are defined in terms of metric
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The US is one of the original signers of the Metric Treaty, so technically we are metric. And it turns out that our common units are defined in terms of the metric system. this video
Cites ithiccuphippoMay 2019
“see this Veritasium episode”
Covers the standard kilogram and national replicas
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I think they needed to take the replicas from other countries like the US to the master one in Paris for comparison every year. Edit: see this Veritasium episode this video
Cites itfreeflightNov 2019
“Funny story about that, the US is actually metric”
Shows the US is officially metric
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Funny story about that, the US is actually metric [0] Still doesn't stop the nutters from opposing it because it's supposedly a tool by the NWO to take over the world, with the US remaining as sole resistance [1] [0] this video [1] link
Cites itPointyFluffNov 2022
“Here's a colorful video”
Colorful explanation that the US is officially metric
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We use metric in the "American Space Program". I cannot think of an engineering or scientific endeavor in the US that DOESN'T use the metric system. The US is officially, metric; ansi converts back for the uneducated. Here's a colorful video: this video Here's boring government text: link