Glucose Level Converter

Blood Glucose Level Converter

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The Difference between mmol/L and mg/dL

Both sets of units provide a measure of the concentration of glucose in the blood, but they do so in slightly different ways. When we use mmol/L, we’re referring to molarity, which indicates the number of molecules of a substance within a specified volume. In this case, it’s the number of molecules within 1 liter. On the other hand, mg/dL gives the concentration by the ratio of weight to volume, specifically in milligrams per deciliter.

In the UK, mmol/L is the more commonly used measurement, while in the USA and continental Europe, mg/dL is predominantly used. To break it down further:

  • mmol/L (Millimoles Per Liter): This is the international standard unit for measuring the concentration of glucose in the blood, also known as millimolar (mM). This unit is widely used in the UK.
  • mg/dL (Milligrams per Deciliter): This is the unit used in the USA to measure the concentration of glucose in the blood, specifically in milligrams per deciliter.
For those without diabetes, blood glucose typically varies from 4 mmol/L to 6 mmol/L. Controlling blood sugar (or blood glucose) is crucial in the human body to minimize the risk of complications. Here are the formulas to convert between mmol/L and mg/dL:
  • To convert mmol/L to mg/dL: mg/dL = mmol/L / 18
  • To convert mg/dL to mmol/L: mmol/L = 18 × mg/dL