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. Also see our helpful online Total Hardness Calculator.
We welcome your questions regarding industrial water softeners. Contact Industrial Water Services at 800-820-9021 or info@industrialh2osolutions.com for information regarding industrial water softener equipment, repair service, or preventative maintenance (PMT).
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:
- General Industrial & Ultrapure Reverse Osmosis Sizing Guide & Calculator
- Industrial Water Softener Sizing Calculator
- Other Calculators for Total Hardness, Water Softener Sizing, Filters, Salt Savings, and Boiler Savings
Need industrial water service? 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.