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Sodium (Na) Unit Converter
Sodium (Na+) is the major extracellular cation in the body, vital for maintaining fluid balance, osmotic pressure, and proper nerve and muscle function.
Clinically, Sodium disorders (**Hyponatremia** and **Hypernatremia**) are common and potentially life-threatening. This converter facilitates switching between the standard SI molar units (mmol/L) and mass units (mg/dL) used in some research or older laboratory reports.
SI Units / Standard
RecommendedFor Sodium, 1 mmol/L is equivalent to 1 mEq/L.
Mass Units
Clinical Context
Reference Range (Serum): Typically 135 – 145 mmol/L (mEq/L).
Critical Values:
• Hyponatremia: < 135 mmol/L. Severe < 120 mmol/L can cause seizures/coma.
• Hypernatremia: > 145 mmol/L. Often indicates dehydration.
Conversion Logic:
Atomic Weight of Sodium: ~22.99 g/mol.
1 mmol/L = 1 mEq/L (Valence = 1).
1 mmol/L ≈ 2.299 mg/dL.
Clinical References
How to Use This Converter
Follow these steps to normalize Sodium values.
Enter Values
Input your laboratory results into the corresponding unit field (e.g., mmol/L).
Automatic Conversion
The calculator instantly updates all other fields. For Na+, mEq/L and mmol/L will show the same value.
Reset
Use the Clear button to reset all fields.
Frequently Asked Questions
Yes. Sodium has a valence of 1, so 1 millimole equals 1 milliequivalent.
It is a key part of the electrolyte panel and helps evaluate hydration status, kidney function, and adrenal function.