Anion Gap

Assesses metabolic acidosis etiology

Sodium *

Chloride *

Bicarbonate *

Potassium

Result

Anion Gap

Step-by-step mode. Answer each question and result updates automatically.

Questions

1 Sodium (mEq/L)

2 Chloride (mEq/L)

3 Bicarbonate (mEq/L)

4 Potassium (mEq/L)

Sodium (mEq/L) *

Step 1 of 4

Chloride (mEq/L) *

Step 2 of 4

Bicarbonate (mEq/L) *

Step 3 of 4

Potassium (mEq/L)

Step 4 of 4

NCBI (StatPearls): https://www.ncbi.nlm.nih.gov/books/NBK539757/

Medscape: https://emedicine.medscape.com/article/2087291-overview

Clinical Intelligence

The Anion Gap Calculator is a medical tool used to measure the difference between primary electrolytes in the blood. It is calculated using sodium (Na⁺), chloride (Cl⁻), and bicarbonate (HCO₃⁻), with an optional inclusion of potassium (K⁺).

This value helps in identifying acid-base imbalances, especially metabolic acidosis. It also indicates the presence of unmeasured ions in the blood.

Formula: {"id":"8a017cc2-9a89-471c-886d-b2f742acfaf6","key":"anion_gap","label":"Anion Gap","expr":"na - (cl + hco3)","unit":"mEq\/L","round":2,"showIf":""}

Formula: {"id":"3acc071e-00a8-4d6b-95ec-319dfdc109a1","key":"anion_gap_k","label":"Anion Gap (with K)","expr":"(na + k) - (cl + hco3)","unit":"mEq\/L","round":2,"showIf":"k > 0"}

NCBI (StatPearls): https://www.ncbi.nlm.nih.gov/books/NBK539757/

Medscape: https://emedicine.medscape.com/article/2087291-overview

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Anion Gap

Anion Gap

Sodium (mEq/L) *

Chloride (mEq/L) *

Bicarbonate (mEq/L) *

Potassium (mEq/L)

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