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Anion Gap Formula

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The anion gap is a value calculated from the results of multiple individual medical lab tests. Check FAQs

AG = Na - (Cl + HCO 3-)

AG - Anion Gap?Na - Na?Cl - Cl?HCO_3- - Bicarbonate?

Anion Gap Example

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With units

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Here is how the Anion Gap equation looks like with Values.

Here is how the Anion Gap equation looks like with Units.

Here is how the Anion Gap equation looks like.

9 = 136 - (100 + 27)

9mEq/L = 136mEq/L - (100mEq/L + 27mEq/L)

9 = 136 - (100 + 27)

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Anion Gap Solution

Follow our step by step solution on how to calculate Anion Gap?

FIRST Step Consider the formula

AG = Na - (Cl + HCO 3-)

Next Step Substitute values of Variables

∴

AG = 136mEq/L - (100mEq/L + 27mEq/L)

Next Step Convert Units

∴

AG = 136mol/m³ - (100mol/m³ + 27mol/m³)

Next Step Prepare to Evaluate

∴

AG = 136 - (100 + 27)

Next Step Evaluate

∴

AG = 9mol/m³

LAST Step Convert to Output's Unit

∴

AG = 9mEq/L

Anion Gap Formula Elements

Variables

Anion Gap

The anion gap is a value calculated from the results of multiple individual medical lab tests.

Symbol: AG

Measurement: Molar ConcentrationUnit: mEq/L

Note: Value can be positive or negative.

Formulas to find Anion Gap

Na or Sodium Ion is the ion which is formed when the sodium atom loses its outer electron.

Symbol: Na

Measurement: Molar ConcentrationUnit: mEq/L

Note: Value can be positive or negative.

Formulas to find Na

Chloride ion is the anion which is formed when the element chlorine gains an electron.

Symbol: Cl

Measurement: Molar ConcentrationUnit: mEq/L

Note: Value can be positive or negative.

Formulas to find Cl

Bicarbonate

Bicarbonate is an intermediate form in the deprotonation of carbonic acid.

Symbol: HCO_3-

Measurement: Molar ConcentrationUnit: mEq/L

Note: Value can be positive or negative.

Formulas to find Bicarbonate

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How to Evaluate Anion Gap?

Anion Gap evaluator uses Anion Gap = Na-(Cl+Bicarbonate) to evaluate the Anion Gap, The anion gap is the difference in the measured cations (positively charged ions) and the measured anions (negatively charged ions) in serum, plasma, or urine. Anion Gap is denoted by AG symbol.

How to evaluate Anion Gap using this online evaluator? To use this online evaluator for Anion Gap, enter Na (Na), Cl (Cl) & Bicarbonate (HCO_3-) and hit the calculate button.

FAQs on Anion Gap

What is the formula to find Anion Gap?

The formula of Anion Gap is expressed as Anion Gap = Na-(Cl+Bicarbonate). Here is an example- 9 = 136-(100+27).

How to calculate Anion Gap?

With Na (Na), Cl (Cl) & Bicarbonate (HCO_3-) we can find Anion Gap using the formula - Anion Gap = Na-(Cl+Bicarbonate).

Can the Anion Gap be negative?

Yes, the Anion Gap, measured in Molar Concentration can be negative.

Which unit is used to measure Anion Gap?

Anion Gap is usually measured using the Milliequivalents per Liter[mEq/L] for Molar Concentration. Mole per Cubic Meter[mEq/L], Mole per Liter[mEq/L], Mole per Cubic Millimeter[mEq/L] are the few other units in which Anion Gap can be measured.

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Anion Gap Formula

Anion Gap Example

Anion Gap Solution

Anion Gap Formula Elements

Other formulas in Blood Differential Test category

How to Evaluate Anion Gap?

FAQs on Anion Gap

Variable Name