I believe the US legally defines the US customary units by metric counterparts anyway. https://www.nist.gov/pml/owm/si-units-length https://www.nist.gov/pml/owm

I believe the US legally defines the US customary units by metric counterparts anyway. https://www.nist.gov/pml/owm/si-units-length https://www.nist.gov/pml/owm/si-units-length Still, I'm probably the 1% of 1% of Americans who uses Celsius in daily life, except where I cannot (my car won't let me do hybrid miles and Celsius, ugh).