Anion Gap
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
AG
About this calculator
The Anion Gap Calculator is an online tool that helps to calculate the anion gap, an important measure in medicine. The anion gap is calculated by the formula: Na − (Cl + HCO₃). This value is useful for detecting the presence of certain medical conditions, such as metabolic acidosis.
The anion gap is a fundamental concept in medicine, particularly in the fields of nephrology and endocrinology. It can be used to evaluate renal function and identify problems of acid-base balance in the body.
It is essential to note that the anion gap is not an absolute value, but rather a relative measure that depends on various factors, including the concentration of sodium, chloride, and bicarbonate in the blood. Therefore, it is crucial to consider the results of the calculator in conjunction with other clinical and laboratory parameters.
If you have any questions about the meaning of your anion gap or how to interpret it, we recommend consulting a healthcare professional. The Anion Gap Calculator is only a supporting tool, not a substitute for medical evaluation.
Frequently asked questions
What is the anion gap and why is it important?
The anion gap is an important measure in medicine that helps to detect the presence of certain medical conditions, such as metabolic acidosis. It is essential to consider the results of the calculator in conjunction with other clinical and laboratory parameters.
When should I use the Anion Gap Calculator?
It may be useful in cases of suspected metabolic acidosis, renal insufficiency or other conditions that affect acid-base balance in the body.
How can I interpret the results of the Anion Gap Calculator?
It is recommended to consult a healthcare professional for a complete and accurate evaluation of the results. The Anion Gap Calculator is only a supporting tool.
What should I do if my anion gap is high or low?
If you have a high or low anion gap, it is recommended to consult a healthcare professional for a complete and accurate evaluation of the results.
Can I use the Anion Gap Calculator without consulting a doctor?
No, it is recommended to consult a healthcare professional before using the Anion Gap Calculator or interpreting the results.