Drugs, too.

Still plenty of imperial sized bullets, ask Charlie.

Don't worry, they'll start measuring things in bullets in no time. Oh wait. 😶

The biggest problem is that we use a mixture of both systems for different things.

As already mentioned. We measure small drinks in fluid ounces, but large bottles of soda in liters.

Those of us with 3D printers set nozzle and bed temps in Celsius, but we set our ovens to cook with in Fahrenheit.

We use metric to describe the length of runs, 5k, 10k, until you get to marathons which are 26.22 miles.

We use feet and inches for construction and woodworking for the most part, but often use millimeters for designing small parts. (at least I do. Fractions of inches are dumb.)

Most science is in the USA is done in metric. But the Mars Climate Orbiter was lost due to software reporting miles as kilometers.

Even the meme about bullets is inconsistent. Some are measured in mm some are measured in fractions or decimals of an inch. like .223 or .30-06

I really wish we could have just powered through and more strictly enforced the metrication process.

A 9mm is 1/12192 of an imperial football field.

(or so my very basic search told me for the sake of a joke, if someone wants to do the math, feel free to prove ddgAI wrong lol)

not true. all us yankers have lost a 10mm socket wrench

10mm >9mm

Best part is that the measurement is only tangentially related to the actual diameter of the bullet; FN 5.7×28mm, 5.56 NATO, and the soviet 5.6×39mm are all 5.7mm across.

Unlike gauge, which is always 1 over the cube root of the barrel diameter divided by the cube root of the density of lead.

Two liter soda

And also engines' volumes.

millimeters for the plugs in my earlobes too

Just let them know their peen will sound far more impressive in cm than inches and they'll switch overnight. It's 10 is far better than 4.

It’s used in hospitals as well.