Q about external headset stack height
 

I am trying to figure out the relative HT sizes of a bike with an integrated headset vs that with an external headset.

The latter bike has a 150mm HT - now, if I add a Chris King 1 1/8" AHeadset with a claimed total stack height of 31.4mm, would that result in a setup that is roughtly equivalent to a 181.4mm HT on a bike with integrated headsets (assuming all else is equal)?

Seems to, but I just want to double-check, to make sure I am not missing anything.

Thanks.