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Learn what potassium is, why you may need a blood test to check your levels, and what the normal range is. Find out the symptoms and causes of high or low potassium levels, and how to prepare for the test. The normal range is 3.7 to 5.2 milliequivalents per liter (mEq/L) 3.70 to 5.20 millimoles per liter (millimol/L). Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your specific test results. The examples above show the common measurements for results for these tests. Some laboratories use different measurements or may test different specimens. We would like to show you a description here but the site won’t allow us. The normal potassium level for an adult ranges from 3.5 to 5.2 mEq/L (3.5 to 5.2 mmol/L). Potassium is ingested through food and electrolyte-enhanced beverages and excreted primarily through urine. Hyperkalemia rarely causes symptoms, so it can be surprising if a blood test shows high potassium levels.
