100 mm WG equals

Answer 1

mmWG is a pressure unit. its something like mm Hg, however in mmWG, W refers to water and G refers to gauge pressure. Hence, mm WG refers to the gauge pressure in terms of milimeters of water.

Answer 2

100 mm WG equals 1 kilopascal (kPa). So, if you're trying to impress someone with fancy units, go ahead and drop that knowledge bomb. Otherwise, just remember that 100 mm WG is equal to 1 kPa and carry on with your day.