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What Is an Acceptable Potassium Level?

The acceptable blood potassium level has a small range, between 3.7 to 5.2 mEq/L. levels outside of this range may be the result of an underlying condition or of a medication that you are taking. Tests for potassium are normally done during the electrolyte test. (Ref. 2.)

  1. Significance

    • As an electrolyte, potassium plays a significant role in the body's electrical and cellular functions. With too much or too little potassium, the body can become imbalanced. (Ref. 1.)

    Normal Level

    • The normal level of blood potassium is between 3.7 to 5.2 mEq/L. (Ref. 2.)

    Hyperkalemia

    • If you have blood levels of potassium above 5.2 mEq/L, you have a condition known as hyperkalemia. This may be caused by a blood transfusion, kidney failure, or respiratory acidosis. (Ref. 2.)

    Hypokalemia

    • If you have blood levels of potassium below 3.7 mEq/L, you have a condition known as hypokalemia. Chronic diarrhea, vomiting, and Cushing sydndrome can cause hypokalemia. (Ref. 2.)

    Considerations

    • Because abnormal potassium levels are often the symptom of an underlying condition, your doctor may request additional tests to determine the cause. (Ref. 2.)

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