Blood Sugar Converter: mg/dL ⇆ mmol/L & Reference Chart

Blood Sugar Converter

Instantly convert blood glucose between mg/dL and mmol/L. Color-coded charts, conversion formulas, guidance, and key values for health and diabetes care.
Result: – mmol/L
Widely used glucose units: mg/dL (primarily USA, Japan, South Korea, India) and mmol/L (Europe, Australia, Canada, China, UK). Normal fasting level: mg/dL 70–99 or mmol/L 3.9–5.5. Look up common conversions or explore the chart below.
Visual Comparison: Blood Sugar Ranges
Low
mg/dL
≤69
mmol/L
≤3.8
Normal
mg/dL
70-99
mmol/L
3.9-5.5
Pre-diabetes
mg/dL
100-125
mmol/L
5.6-6.9
Diabetes
mg/dL
≥126
mmol/L
≥7.0

Popular Conversion Lookup Table

mg/dL mmol/L Status
543.0Very Low
703.9Lower Limit (Normal)
854.7Normal
995.5Upper Normal
1106.1Impaired (Pre-diabetes)
1206.7Impaired
1267.0Diabetes Diagnosis
1407.8Post-meal High
18010.0Elevated (Post-meal)

Frequently Asked Questions

How to convert mg/dL to mmol/L?
Multiply the mg/dL value by 0.0555 (or divide by 18). For example: 110 mg/dL × 0.0555 ≈ 6.1 mmol/L.

How to convert mmol/L to mg/dL?
Multiply the mmol/L value by 18. For example: 7.0 mmol/L × 18 ≈ 126 mg/dL.

Why are there different blood glucose units?
The USA commonly uses mg/dL, while many other countries and medical guidelines use mmol/L.

What are healthy fasting levels?
Typically, 70–99 mg/dL (3.9–5.5 mmol/L) for healthy adults. Individual targets may vary by health situation.

What do high or low numbers mean?
Low values (hypoglycemia) can be dangerous, while consistently elevated readings can indicate diabetes or risk for complications. Always consult a medical professional for diagnosis or management.

Unit Usage Differences Worldwide

The mg/dL unit is standard in the United States, Japan, India, and a few other countries, whereas mmol/L is widely adopted in Europe, Canada, Australia, the UK, and China. In many international clinics or research, mmol/L is now preferred for clarity and scientific consistency.

References

  • American Diabetes Association. Classification and Diagnosis of Diabetes: Standards of Medical Care in Diabetes—2024. Diabetes Care. 2024;47(Supplement_1):S19-S38.
  • Diabetes.co.uk. Blood Sugar Converter. Available at: https://www.diabetes.co.uk/blood-sugar-converter.html
  • Nutrisense Journal. How to Read a Blood Sugar Conversion Chart. Available at: https://www.nutrisense.io/blog/blood-sugar-conversion-chart
  • Omni Calculator. Blood Sugar Converter. Available at: https://www.omnicalculator.com/health/blood-sugar
  • Professional Diabetes Care. ADA Glucose Calculator. Available at: https://professional.diabetes.org/glucose_calc
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