Explore the potassium normal range , its health implications, and how it affects your well-being. Understand your health better—read the article now. 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 ... Why Do I Need a Potassium Blood Test ? The potassium test measures the amount of potassium in your blood to see if levels fall within the normal range or are abnormally high (hyperkalemia) or abnormally low (hypokalemia). 1 As part of the BMP, the potassium test is commonly performed during routine checkups to assess your general health. Learn about the Potassium Test, a blood test that measures the level of potassium in your blood. Find out the normal range , why you may need the test, how it is done, and what the results mean.