mg to mEq calculator


Free online mg to mEq calculator – Convert milligrams (mg) to milliequivalents (meq), Enter the mg and select substance then click the calculate button.

mg to mEq formula

To convert milligrams (mg) to milliequivalents (mEq), you can use the following formula:

mEq = (mg * V) / At Wt


  • mg = milligrams
  • mEq = milliequivalent
  • At Wt = Atomic Weight or molecular weight
  • V= Valance number

How to convert mg to mEq?

To convert milligrams (mg) to milliequivalents (mEq), you need to know the Atomic weight and valence of the substance

Here’s a step-by-step guide:

  • Select the substance : (eg – Na)
  • Determine the mg
  • Next, look up the atomic weight of the substance (use the periodic table)
  • Next, Determine the valence (ex – valence of magnesium is 2)
  • Next, use the above formula

Solved Example

Example – 100mg of sodium (Na). Sodium has a valence of 1 and an atomic weight of 23. To convert it to mEq (milliequivalent).

solved –

  • milligrams = 100 mg
  • atomic weight of sodium = 22.99 g/mol
  • Number of valence = 1

Put all values into the formula

mEq = (100mg * 1) / 22.99 = 4.3497 mEq
mEq ≈ 4.3497 mEq

100mg of sodium is equivalent to approximately 4.3497 mEq.

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