Grams to mEq Calculator
Convert grams to milliequivalents (mEq) using molecular weight and valence. Perfect for chemistry students, pharmacists, clinicians, and laboratory professionals.
Formula: mEq = (Grams x 1000 x Valence) / Molecular Weight
Grams to Milliequivalents Converter
Enter the mass of the substance
Molecular weight of the substance
Number of charges the ion carries
Advanced Settings
mEq Result
Enter mass, molecular weight, and valence
then click "Calculate" for mEq
Grams to mEq
When working in chemistry or medicine, mass alone does not tell the full story. Two substances may weigh the same, yet react very differently. That is why we use milliequivalents (mEq) — they measure chemical combining power, not just weight.
The Formulas Used
Milliequivalents depend on valence — the number of charges an ion carries. The calculation involves two steps:
mEq = (2 x 1000 x 1) / 23
Result: 86.96 mEq
Grams to mEq Conversion Table
Quick reference for common substances:
| Substance | Grams | MW | Valence | mEq |
|---|---|---|---|---|
| Na+ | 1 | 23 | 1 | 43.48 |
| Na+ | 2 | 23 | 1 | 86.96 |
| K+ | 1 | 39.1 | 1 | 25.58 |
| K+ | 2 | 39.1 | 1 | 51.15 |
| Ca2+ | 1 | 40 | 2 | 50.00 |
| Ca2+ | 2 | 40 | 2 | 100.00 |
| Mg2+ | 1 | 24.3 | 2 | 82.30 |
| Mg2+ | 0.5 | 24.3 | 2 | 41.15 |
| Cl- | 1 | 35.5 | 1 | 28.17 |
| Cl- | 3.55 | 35.5 | 1 | 100.00 |
| HCO3- | 1 | 61 | 1 | 16.39 |
| HCO3- | 6.1 | 61 | 1 | 100.00 |
| Fe2+ | 1 | 56 | 2 | 35.71 |
| Fe3+ | 1 | 56 | 3 | 53.57 |
| PO4 3- | 1 | 95 | 3 | 31.58 |
| SO4 2- | 1 | 96 | 2 | 20.83 |
| Na+ | 0.5 | 23 | 1 | 21.74 |
| Ca2+ | 0.5 | 40 | 2 | 25.00 |
| K+ | 3.91 | 39.1 | 1 | 100.00 |
| Mg2+ | 2.43 | 24.3 | 2 | 200.00 |
| Cl- | 5 | 35.5 | 1 | 140.85 |
In clinical settings, electrolyte balance is measured in mEq because it reflects chemical strength, not just weight. In water treatment, mEq helps determine hardness and treatment requirements. Accurate conversion prevents dosage errors and ensures proper chemical balance in medical and industrial applications.