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Blood Sugar Converter (mg/dL ↔ mmol/L)

Convert blood glucose from mg/dL to mmol/L.

Last updated: 12 Aug 2026

Quick answer

To convert blood sugar from mg/dL to mmol/L, divide by 18. For example, 126 mg/dL ÷ 18 = 7.0 mmol/L. Enter your mg/dL reading above to convert.

Convert blood glucose between the Indian/US unit (mg/dL) and the international unit (mmol/L) by dividing by 18. This is for information only and not medical advice.

How to convert blood sugar units

  1. 1 Enter your blood sugar reading in mg/dL.
  2. 2 We divide by 18.
  3. 3 Your value in mmol/L appears instantly.

Frequently asked questions

How do I convert mg/dL to mmol/L?
Divide the mg/dL value by 18. For example, 126 mg/dL ÷ 18 ≈ 7.0 mmol/L.
What is a normal fasting blood sugar?
Generally under 100 mg/dL (5.6 mmol/L) fasting is considered normal; consult a doctor for interpretation.
Is this medical advice?
No — this tool only converts units. Always consult a healthcare professional about your readings.

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