Enter the milligrams (mg) of substance, valence, and molecular weight into the calculator to determine the mEq.
mEq Formula
The following formula is used to calculate the milliequivalent (mEq) of a substance.
mEq = mg * V / MW
- where mEq is the milliequivalent
- mg is the milligrams of substance
- V is the valence of the substance
- MW is the molecular weight of the substance
mEq Definition
mEq is short for milliequivalent. The milliequivalent is a measure of the combining power of an element relative to the activity of 1 mg of hydrogen. This term is most often associated with electrolytes.
Example Problem
How to calculate mEq?
- First, determine the mg of the substance.
In this example, there is a total of 25mg of substance.
- Next, determine the valence.
The valence of this material is 3.
- Next, determine the molecular weight.
The molecular weight is found to be 40 mg/mol.
- Finally, calculate the mEq.
Using the formula above, the milliequivalent is calculated to be:
mEq = mg * V / MW
mEq = 25*3/40
mEq = 1.875
