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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. The chart guide below outlines normal potassium ranges for both men and women, along with important gender-specific variations that can affect your levels. While the standard reference range of 3.5-5.0 mmol/L applies broadly, factors such as muscle mass, hormonal fluctuations, and physical activity can create meaningful differences between men and women. The chart includes both US (mEq/L) and international (mmol/L) units for global reference, though these values are numerically equivalent ... 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.