Conversions and Guides – Water Chemistry CaCO3 Equivalents

Multiply the mg/l of the substances listed below by the corresponding factors to obtain mg/l as CaCO3. For example, 70 mg/l of Mg + + would be (70) (4 10) = 287 mg/l as CaCO3. Try our free online total hardness calculator and our calculator to determine the correct size of an industrial water softener.

Need assistance? Contact Industrial Water Solutions at 800-820-9021 or info@industrialh2osolutions.com for:

We service and sell industrial water softeners, industrial reverse osmosis, industrial water UV systems, and other industrial water systems throughout the U.S. including Indiana, Kentucky, Michigan, Ohio, and Illinois.

Also see our helpful resources and industrial water technical articles for industrial water softeners, reverse osmosis, deionization, filters, brine tanks, and more.

substance factor substance factor
Al+ + + 5.56 K+ 1.28
Al2(SO4)3(a) 0.88 KCl 0.67
Al2(SO4)3(a) 0.88 KCl 0.67
AlCl3 1.13 K2CO3 0.72
Al(OH)3 1.92 Mg+ + 4.10
Ba+ + 0.73 MgCl2 1.05
Ba(OH)2 0.59 MgCO3 1.19
BaSO4 0.43 Mg(HCO3)2 0.68
Ca+ + 2.50 MgO 2.48
CaCl2 0.90 Mg(OH)2 1.71
CaCO3 1.00 Mg(NO3)2 0.67
Ca(HCO3)2 0.62 MgSO4 0.83
CaO 1.79 Mn+ + 1.82
Ca(OH)2 1.35 Na+ 2.18
CaSO4(a) 0.74 NaCl 0.85
Cl– 1.41 Na2CO3 0.94
CO2 2.27 NaHCO3 0.60
CO–3 1.67 NaNO3 0.59
Cu+ + 1.57 NaOH 1.25
Cu+ + + 2.36 Na2SO4(a) 0.70
CuSO4 0.63 NH3 2.94
F- 2.66 NH4 2.78
Fe+ + 1.79 NH4OH 1.43
Fe+ + + 2.69 (NH4)2SO4 0.76
Fe(OH)3 1.41 NO-3 0.81
FeSO4(a) 0.66 OH 2.94
Fe2(SO4)3 0.75 PO—4 1.58
FeCl3 0.93 SO–4 1.04
H+ 50.0 Zn+ + 1.54
HCO-3 0.82

(a)anydrous

You may also find our industrial water calculators helpful:

Need industrial water service? Preventative maintenance? Someone to design or size industrial water treatment equipment? Contact us at info@industrialh2osolutions.com or call us at 800-820-9021 for parts or service today! We service Indianapolis, Indiana, the Midwest, and throughout the U.S.

Contact Us Now Get a Quote

BBB A+ Logo
info@industrialh2osolutions.com
1-800-820-9021