Is the measure tool supposed to round?

If I create a wall that are 10188 mm and measure it, it shows 10190. If I open the wall it says distance between points 10188.

xStart='20.4'
yStart='1018.8'
xEnd='20.4'
yEnd='0.0'
height='260.0'
thickness='40.8'

Other walls it measures correctly, so I'm a ...