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Electrolytes & Minerals
Normal range 135-145 mEq/L (135-145 mmol/L SI). Specimen: Serum or plasma.
Also known as: serum sodium, na.
Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for Sodium (Na⁺); those can be narrower than the band shown.
| Specimen | Serum or plasma |
|---|---|
| Conventional range | 135-145 mEq/L |
| SI range | 135-145 mmol/L |
| Conversion factor | ×1 (conventional → SI) |
| Critical value | < 120 or > 160 mmol/L (seizure and neurologic risk) |
| Panel | Electrolytes & Minerals |
Convert any Sodium (Na⁺) result between units on the unit converter.
The standard teaching reference range for Sodium (Na⁺) is 135-145 mEq/L in conventional units, or 135-145 mmol/L in SI units. This value is measured in serum or plasma.
For Sodium (Na⁺), the commonly taught critical (panic) value is: < 120 or > 160 mmol/L (seizure and neurologic risk). Critical results are reported to the provider immediately under your facility's policy.
Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population - always use the range printed on the actual result.
Above the range
Below the range
At the bedside
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