Mg/L to Meq/L Calculator

How to Convert Mg/L to Meq/L

The Mg/L to Meq/L Converter calculates the concentration in milliequivalents per liter (meq/L) from concentration, molecular weight, and valence using the following formula:

\[ \text{meq/L} = \frac{\text{C}}{\text{MW}} \times \text{V}\]

Where:

\( \text{C} \): Concentration (converted to mg/L).
\( \text{MW} \): Molecular weight (converted to g/mol).
\( \text{V} \): Valence, the number of equivalents per mole (unitless, typically an integer like 1 or 2).
\( \text{meq/L} \): Milliequivalents per liter.
\( 1000 \): Conversion factor to milliequivalents.

Select the units for concentration (mg/L, g/L, μg/L) and molecular weight (g/mol, kg/mol, mg/mol), then enter the values and valence to calculate meq/L.

Using the Mg/L to Meq/L Converter

This converter is useful in chemistry and environmental science for converting mass-based concentrations to ion-based concentrations in meq/L.

Input the concentration with its unit (mg/L, g/L, or μg/L), molecular weight with its unit (g/mol, kg/mol, or mg/mol), and valence. The calculator converts all inputs to mg/L and g/mol, then computes the meq/L.

Example: Convert 0.04008 g/L of calcium (Ca²⁺) to meq/L, with a molecular weight of 40.08 g/mol and valence of 2.

Concentration: \( 0.04008 \, \text{g/L} = 40.08 \, \text{mg/L} \)
Molecular Weight: \( 40.08 \, \text{g/mol} \)
Valence: \( 2 \)
meq/L: \( \frac{40.08}{40.08} \times 2 = 2 \, \text{meq/L} \)
Result: \( 2 \, \text{meq/L} \)

Use this tool for accurate conversions.

Common Conversion Table

Reference conversions for common ions (all in base units: mg/L and g/mol):

Ion	Concentration (mg/L)	Molecular Weight (g/mol)	Valence	meq/L
Na⁺	22.99	22.99	1	1.000
Ca²⁺	40.08	40.08	2	2.000
Mg²⁺	24.31	24.31	2	2.000
Cl⁻	177.25	35.45	1	5.000
HCO₃⁻	183.03	61.01	1	3.000

Adjust units as needed using the form dropdowns.

Common FAQ

Below are frequently asked questions about Mg/L to Meq/L conversions:

Q: What units can I use?
A: Concentration: mg/L, g/L, μg/L. Molecular weight: g/mol, kg/mol, mg/mol. The calculator converts all to mg/L and g/mol.
Q: Why do I need molecular weight and valence?
A: They determine the mass per mole and the number of equivalents, essential for the meq/L conversion.
Q: Can negative values be used?
A: No, negative values are not meaningful. The calculator enforces positive inputs.
Q: How accurate is this converter?
A: Results are rounded to 6 decimal places using the exact formula.