>>76529594 (OP)
>How do you measure your body fat?
Oh boy, I have been there. tl;dr: You can't, really.
BIA sucks, Dexa scams also suck (but DXA is fuckign expensive so watch people recommend it to everyone). Caliper is the only thing that kinda sorta works. If you don't have one, pinch with your fingers and measure with a yardstick for a ballpark, it's not that different in practise, really.
Problem is mainly that depending on where you pinch and even how deep you measure the fold (crest or ase), the outcome can be very different. For example, my abdominal fold is around 17mm at the base, directly at the sin, but only 10-12 mm at the crest. But there is just a 1mm diff between the low tech-pinch+yardstick approach and an actual caliper, I just tried it out.