Milliequivalents (meq or mEq) Weight Chart

The vital body substances are measured in terms of equivalents. When the amount of substance in equivalents has very small size, the term milliequivalents is used. It is expressed in terms of meq or mEq. 1 equivalent = 1000 milliequivalents. In terms of grams the equivalent weight is equal to 1000 milliequivalent weights. This unit is mostly used for the measurement of compounds in biological fluids such as potassium in the blood. Listed below are several commonly used electrolytes and their milliequivalent weights.

Ion or CompoundmEq W.(g)
Na+0.023
HC03-0.061
K+0.039
NaCl0.0585
Ca++0.020 
KCl 0.0745 
Mg++ 0.012
CaCl.2H2O0.0735
NH4+0.018
NH4Cl 0.0535 
Cl0.0355
MgSO4.7H20 0.123
Lactate 0.089
NaHCO30.084
Acetate0.059
Ca Gluconate0.224
Citrate0.063
Phosphorus0.031

Formula:

mEq = Weight (grams) / mEq Weight (grams) Milli Equivalent weight (mEq W) = Atomic Weight (g) / (Valence) × 1000

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