Community Answer

Answered by Dr. SugarSense 🩺

Blood sugar levels are often measured in two units: millimoles per liter (mmol/L) and milligrams per deciliter (mg/dL).

  • mmol/L is the standard unit used in most countries outside the United States to measure blood glucose concentration.
  • mg/dL is commonly used in the United States.

Conversion Between mmol/L and mg/dL

To convert between the two units:

  • From mmol/L to mg/dL: Multiply by 18.
  • From mg/dL to mmol/L: Divide by 18.

Example:

  • A blood sugar level of 5.5 mmol/L is equivalent to 99 mg/dL.
  • A blood sugar level of 126 mg/dL is equivalent to 7.0 mmol/L.

Normal Blood Sugar Ranges

  • Fasting Blood Sugar (mmol/L):

    • Normal: 3.9–5.5 mmol/L
    • Prediabetes: 5.6–6.9 mmol/L
    • Diabetes: ≥7.0 mmol/L
  • Post-Meal Blood Sugar (mmol/L):

    • Normal: <7.8 mmol/L
    • Prediabetes: 7.8–11.0 mmol/L
    • Diabetes: ≥11.1 mmol/L

Understanding these units and ranges can help you better manage and monitor your blood sugar levels.

Last updated: 1/12/2025

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