Estimate the anion gap quickly so you can think about whether a metabolic acidosis looks high gap, normal gap, or low.
Estimate the anion gap quickly so you can think about whether a metabolic acidosis looks high gap, normal gap, or low.
Enter the values you already know, then move straight to the result below without changing context.
Save this result to your free dashboard or bookmark the tool for later.
Save actions are explicit only. Public calculator use stays free and does not require login.
The calculator subtracts chloride and bicarbonate from sodium, with an optional potassium-inclusive version if you enter potassium.
Sodium, chloride, bicarbonate, and whether potassium is included all change the result.
Use it when you want to sense-check a metabolic acidosis pattern or check a teaching case quickly.
These answers are kept concise so you can check the basics quickly and move on.
No. It is an educational calculator only and should never replace clinical judgement or senior review.
Yes. Reference ranges and escalation thresholds can vary by hospital, lab, and patient group.
Use the result as a quick sense check only. If the patient is unwell, act on the clinical picture first.
No. Always follow local policy and senior advice.
These links keep the next step close at hand so you can move from planning back into revision or further checking without losing your place.
Calculate the anion gap with or without potassium and see whether the result sits in a low, normal, or high planning band.
