World-building is a key component of writing fiction, particularly in the genres of sci-fi and fantasy. That means you have to have culture, history, and everything else that comes with a real world underlying your story.
Including ... measurement units?
Maybe not. Maybe your world is built enough off of ours that it makes sense to stick with the usual feet and inches, pounds and ounces. Or if your world is in a future where scientific reasonableness is king, so you're all metric.
But what if that won't work for your world?
My first novel was largely in an alternate dimension with some shared history, but mostly a huge divergence. And a very science-oriented society. In a particular situation, I needed to make a reference to a measurement of volts.
Volts were named for Alessandro Volta. A dude who didn't exist in that dimension.
First thought: Oh, crap.
Second thought: Okay, what made-up units would make sense in this word I've created?
I considered how the society was fairly practical and straightforward in other naming practices, and I thought about what voltage means. In the end, I came up with a fake unit that seemed to fit both needs.
Have you ever thought about how many units are named after a person? Fahrenheit and Celsius for temperature. Volts, amperes, coulombs, and ohms for various aspects of electricity and charge. Newtons for force, pascals for pressure.
If you don't need to worry about these things in your stories, you're a lucky one. For the rest of us, make sure you think about a natural way for units to evolve in your world.
Have you invented units/measurements for one or more of your stories? How did you go about it?