Electrolyte Balance Calculator
Evaluate serum electrolytes (Na, K, Cl, HCO₃) and calculate anion gap. Identify imbalances and compare with clinical reference ranges.
Step 1: Enter Electrolyte Values (mmol/L)
Anion Gap Formula
AG = Na – (Cl + HCO₃) (normal 8–12 mmol/L)
(Potassium is not included in the classic AG, but used for balance)
Step 2: Clinical Options
Common Imbalances
• Hyponatremia: Na <135
• Hyperkalemia: K >5.0
• High AG acidosis: AG >12
• Low AG: AG <8 (consider lab error or hypoalbuminemia)
Electrolyte & Anion Gap Results
Anion Gap (AG)
Electrolyte Panels Comparison
| Panel / Condition | Na (mmol/L) | K (mmol/L) | Cl (mmol/L) | HCO₃ (mmol/L) | Anion Gap |
|---|
Anion Gap & Electrolyte Formulas
Anion Gap = Na – (Cl + HCO₃)
Normal range: 8–12 mmol/L (without K)
• High AG (>12) : metabolic acidosis (lactic, ketoacidosis, toxins)
• Normal AG : diarrhea, renal tubular acidosis
• Low AG (<8) : hypoalbuminemia, lab error, myeloma
Electrolyte normal ranges (adult)
Sodium: 135–145 | Potassium: 3.5–5.0 | Chloride: 98–108 | Bicarbonate: 22–29
Na/K ratio: normally ~30–35; deviations may indicate pathology.
Example Calculation
Typical normal values
Na=140, K=4.0, Cl=102, HCO₃=24
AG = 140 – (102+24) = 14 → borderline high? Wait, 140-126=14. Normal AG 8-12, so 14 is slightly elevated. In practice, albumin adjustment needed. This tool uses classic AG.
Interpretation: Always consider clinical context.
Need help interpreting electrolyte results?
Our team of medical professionals can provide context and guidance for abnormal electrolyte values. Always consult a qualified healthcare provider for diagnosis.
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