Free Anion Gap Calculator Online
Determine serum anion gaps based on sodium, chloride, and bicarbonate ion concentrations.
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Serum Electrolyte Balance Calculations
Evaluate metabolic panels and metabolic acidosis variables. Always verify clinical calculations with an attending medical professional.
Frequently Asked Questions (FAQ)
What is the Anion Gap?
The anion gap is a clinical metric calculated from basic metabolic panel electrolyte levels. It represents the difference between measured cations (positive ions) and measured anions (negative ions).
What is the standard formula?
The standard serum formula is: Anion Gap = Sodium - (Chloride + Bicarbonate).
What is a high anion gap indicate?
A high anion gap (above 12 mEq/L) suggests metabolic acidosis, potentially caused by ketones, lactic acid, toxins, or renal failure.
Does potassium affect the calculation?
Potassium is sometimes included in the formula (Na + K - Cl - HCO3). However, because potassium levels are small, the sodium-only formula is standard in clinical settings.
Is patient medical data secure?
Yes, all math is calculated locally in your browser. We store no medical logs.