mEq to mg conversion calculator

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Formula for mEq to mg conversion

To convert milliequivalents (mEq) to milligrams (mg) for a specific substance, you need to account for its molecular weight (MW) and valence (V). The general formula is:

mg = (mEq × MW) / Valence

Where:

  • mg = Mass in milligrams
  • mEq = Number of milliequivalents
  • MW = Molecular weight in grams per mole (g/mol)
  • V = Valence of the substance

This formula adjusts the conversion based on the substance’s chemical properties, ensuring accurate results.

Common Example: Potassium (K)

For potassium (K), the molecular weight is 39.1 g/mol, and its valence is 1 (since it’s a monovalent ion). The formula simplifies to:

mg of potassium = mEq of potassium × 39.1

Here are some examples:

  • 5 mEq: 5 × 39.1 = 195.5 mg
  • 10 mEq: 10 × 39.1 = 391 mg
  • 20 mEq: 20 × 39.1 = 782 mg

How to Use the mEq to mg Conversion Calculator

The calculator simplifies the process. Follow these steps:

  1. Select the substance (e.g., potassium, calcium).
  2. Enter the mEq value.
  3. Click “Calculate” to get the mg equivalent.

Substances You Can Convert

The calculator supports a variety of substances, each with its own molecular weight and valence:

  • Potassium (K)
  • Calcium (Ca)
  • Magnesium (Mg)
  • Sodium (Na)
  • Chlorine (Cl)
  • Phosphorous (P)
  • Sulfur (S)
  • Sulfate (SO₄)
  • Zinc (Zn)
  • Lithium (Li)
  • Potassium chloride (KCl)
  • Sodium chloride (NaCl)

Since molecular weight and valence differ for each substance, the conversion factor varies. Always choose the correct substance for precise calculations.

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