[eklikewhoa]

4dKH

1dKH is 17.9ppm so x's that by 4

 

[Left C]

I've always used 17.86 instead of 17.9, but for most of our purposes 17.9 is close enough.

Here's another way to do it also. You can take dKH and divide it by 0.056 to get ppm. Also, you can mulitply ppm by 0.056 to get dKH.

 

[cliner]

Thanks for the tip.