Water Hardness Converter
Convert water hardness from parts per million (ppm) to grains per gallon (gpg). Simply divide by 17.118 to translate the value.
CalcSimpler Examples
- 180 ppm ⇒ 10.52 gpg
- 60 ppm ⇒ 3.51 gpg
- 350 ppm ⇒ 20.46 gpg
FAQ
What is water hardness?
It measures dissolved minerals like calcium and magnesium, expressed as calcium carbonate.
How do I convert ppm to gpg?
Divide the ppm value by 17.118.
Does a higher gpg mean harder water?
Yes, larger gpg values indicate harder water.
Can this calculator handle very high values?
Yes, but residential water usually stays below 30 gpg.
Additional Information
- 1 gpg equals 17.118 ppm.
- Soft water is generally below 3 gpg, while anything above 10 gpg is considered very hard.
- Knowing hardness helps size water softeners and protect plumbing.
CalcSimpler