Skip to content
Manage My Life

How do I convert a ppm water hardness number to a gpg to set the water softener?

My water softener asks for a gpg hardness number. My water test results give me a ppm hardness figure. How do I convert the ppm to gpg?

Building Supplies
Sign in to answer a question
1 Answer from this member:
Lyle W
1.0ppm = 0.058419gpg. To convert from ppm to gpg use the following formula:

ppm x 0.058419gpg/ppm = gpg

For example, 60ppm would equal 3.5gpg (60 X 0.058419).
by Lyle W Earned 10,866 community points in Building Supplies
October 13th, 2008
0 votes
Didn't find what you are looking for? Ask a question
Get up to
% off
On Building Supplies