Comment Re:0.001km = 0.01hm = 1m = 10dm = 100cm = 1000mm (Score 2) 909
Just use 12 as your base. Have 36cm instead of 1 foot in whatever it is you are making and then you can divide exactly by all those fractions you like.
but who wants to deal with 250 um on a construction site?
Anyone working to 0.25mm won't be doing it on a construction site. It is 0.00984251969 inches.