What measurements does KSP use? (i.e. Does 215 thrust means 215 lb-f?)

[maltesh]

This is just a coincidence, the meter wasn't designed after that length. It is that, somehow, it happened to be the same. I think the meter is (or was) defined by the circumference of Earth divided by something i think.

Originally, the meter was defined as one ten-millionth the distance from the north pole to the equator, (through the Paris Meridian, I think).

Currently, the meter is defined as the distance light travels in a vacuum in 1/299792458 of a second.

[ramipro]

That's right, I knew it was something about one of Earth's longitudes.

[EndlessWaves]

Right, it's a lot easier to say 5 foot 8 than 1.7272 meters for someone's height, and easier to measure a foot or an inch without a ruler than a meter or a centimeter.

But of course any time you have to upscale or downscale beyond inches and feet the system falls apart.

You'd usually say One point seven, which is exactly the same as five foot eight.

And it's not easy to measure without a ruler in any standard unit, that just comes down to what you have practice in.