Anion Gap Calculator
Calculate anion and delta gaps.
Calculator
Enter the serum electrolyte values in mEq/L.
Reference Information
The anion gap (AG) represents the concentration of all the unmeasured anions in the plasma.
Anion Gap Reference Ranges
| Population | Range |
|---|---|
| Nonpregnant Adult | 10 - 17 mmol/L |
| First Trimester | 10 - 20 mmol/L |
| Second Trimester | 10 - 18 mmol/L |
| Third Trimester | 11 - 18 mmol/L |
During pregnancy the Anion gap shows a net increase of 1 to 2 mmol/L from the nonpregnant state.
Causes of a High Anion Gap (MUDPILERSO)
- Methanol
- Uremia
- Diabetic Ketoacidosis (DKA) or starvation ketosis
- Paraldehyde, Phenformin
- Isopropyl Alcohol, Isoniazid, Infection
- Lactic Acidosis
- Ethylene Glycol, ethyl alcohol
- Rhabdomyolysis
- Salicylates
- Other Causes: Hyperalbuminemia, administered anions
Disclaimer
All calculations must be confirmed before use. The estimated results are not a substitute for clinical judgment.
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