Enter the milliequivalents (meq) and select to substance to convert meq to mg. Alternatively, you can enter custom valence and molar mass.

mEq to mg Calculator

Choose a preset or use Custom, then convert mEq and mg in either direction.
Preset values fill automatically. You can still override them.
Fill exactly 3 fields to solve the missing one.
Convert mEq to practical product amounts like mL, tablets, or ampules.
Use this when the formulation is not listed. The mg and mmol outputs use the optional custom factors below.
Potassium (K⁺) mEq ↔ mg Conversion Table
K⁺ mEq to mg K⁺ mg to mEq
1 mEq = 39.1 mg99 mg = 2.532 mEq
2 mEq = 78.2 mg250 mg = 6.394 mEq
5 mEq = 195.5 mg391 mg = 10.000 mEq
8 mEq = 312.8 mg500 mg = 12.788 mEq
10 mEq = 391.0 mg750 mg = 19.181 mEq
12 mEq = 469.2 mg1000 mg = 25.575 mEq
15 mEq = 586.5 mg1500 mg = 38.363 mEq
20 mEq = 782.0 mg2000 mg = 51.151 mEq
24 mEq = 938.4 mg2300 mg = 58.823 mEq
25 mEq = 977.5 mg3000 mg = 76.726 mEq
30 mEq = 1173.0 mg3519 mg = 90.000 mEq
40 mEq = 1564.0 mg4000 mg = 102.302 mEq
45 mEq = 1759.5 mg4692 mg = 120.000 mEq
50 mEq = 1955.0 mg4700 mg = 120.205 mEq
60 mEq = 2346.0 mg5000 mg = 127.877 mEq
80 mEq = 3128.0 mg6000 mg = 153.453 mEq
90 mEq = 3519.0 mg7000 mg = 179.028 mEq
100 mEq = 3910.0 mg7820 mg = 200.000 mEq
120 mEq = 4692.0 mg8000 mg = 204.604 mEq
200 mEq = 7820.0 mg10000 mg = 255.754 mEq
Formula (K⁺): mg = mEq × 39.1 and mEq = mg ÷ 39.1.
Sodium (Na⁺) mEq ↔ mg Conversion Table
Na⁺ mEq to mg Na⁺ mg to mEq
10 mEq = 230 mg500 mg = 21.739 mEq
50 mEq = 1150 mg1000 mg = 43.478 mEq
100 mEq = 2300 mg1500 mg = 65.217 mEq
154 mEq = 3542 mg2300 mg = 100.000 mEq
200 mEq = 4600 mg3000 mg = 130.435 mEq
Formula (Na⁺): mg = mEq × 23 and mEq = mg ÷ 23.

Meq to Mg Conversion Formula

The formula to convert milliequivalents to milligrams is:

mg = (meq * Atomic/Molecular Weight) / Valence

Variables:

  • mg is the mass in milligrams
  • meq is the amount in milliequivalents
  • Atomic/Molecular Weight is the atomic or molecular weight in mg/mmol
  • Valence is the valence of the substance

To convert meq to mg, multiply the milliequivalents by the atomic or molecular weight and then divide by the valence of the substance.

What is a Milliequivalent?

A milliequivalent (meq) is a unit of measure that reflects the amount of a substance based on the number of ions or electrons that the substance can supply in a chemical reaction. It is commonly used in chemistry and medicine, particularly in the context of electrolyte concentrations in fluids.

How to Calculate Milligrams from Milliequivalents?

The following steps outline how to calculate milligrams from milliequivalents.

  1. First, determine the amount in milliequivalents (meq).
  2. Next, determine the valence of the substance.
  3. Then, determine the atomic or molecular weight in mg/mmol.
  4. Use the formula: mg = (meq * Atomic/Molecular Weight) / Valence.
  5. Finally, calculate the mass in milligrams (mg).
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Milliequivalents (meq) = 5 meq

Valence = 2

Atomic or Molecular Weight (mg/mmol) = 24.305 (Magnesium)