<P> The international standard way of measuring blood glucose levels is in terms of a molar concentration, measured in mmol / L (millimoles per litre; or millimolar, abbreviated mM). In the United States, Germany and other countries mass concentration is measured in mg / dL (milligrams per decilitre). </P> <P> Since the molecular weight of glucose C H O is 180, the difference between the two units is a factor of 18, so that 1 mmol / L of glucose is equivalent to 18 mg / dL . </P> <P> Normal value ranges may vary slightly among different laboratories . Many factors affect a person's blood sugar level . The body's homeostatic mechanism of blood sugar regulation (known as glucose homeostasis), when operating normally, restores the blood sugar level to a narrow range of about 4.4 to 6.1 mmol / L (79 to 110 mg / dL) (as measured by a fasting blood glucose test). The normal sugar level in blood for an average person is not a single numeric number universally . </P> <P> The normal blood glucose level (tested while fasting) for non-diabetics, should be between 3.9 and 7.1 mmol / L (70 to 130 mg / dL). The mean normal blood glucose level in humans is about 5.5 mmol / L (100 mg / dL); however, this level fluctuates throughout the day . Blood sugar levels for those without diabetes and who are not fasting should be below 6.9 mmol / L (125 mg / dL). The blood glucose target range for diabetics, according to the American Diabetes Association, should be 5.0--7.2 mmol / l (90--130 mg / dL) before meals, and less than 10 mmol / L (180 mg / dL) after meals (as measured by a blood glucose monitor). </P>

What is normal blood sugar level in usa
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