Blood Sugar Converter & HbA1c Calculator
Instantly convert blood glucose (mg/dL to mmol/L) and estimate HbA1c. Features ADA risk assessment and local history tracking.
Recent Calculations
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About
Managing diabetes requires constant monitoring of blood glucose levels, but different regions use different units. The US and France typically use mg/dL, while the UK, Canada, and Australia use mmol/L. This tool provides instant bidirectional conversion and estimates the HbA1c (Glycated Hemoglobin) percentage, which reflects average blood sugar over the past 2-3 months.
It classifies results based on American Diabetes Association (ADA) guidelines, alerting users to potential Hypoglycemia (dangerously low) or Hyperglycemia (high). Proper interpretation of these numbers is vital for insulin dosage and diet management.
Formulas
The relationship between the molecular weight of glucose and volume allows for a linear conversion factor:
The estimated HbA1c is derived from the average glucose (eAG) using the formula:
Reference Data
| Category | mg/dL Range | mmol/L Range | HbA1c Approx |
|---|---|---|---|
| Hypoglycemia | < 70 | < 3.9 | n/a |
| Normal (Fasting) | 70 – 100 | 3.9 – 5.6 | < 5.7% |
| Prediabetes | 101 – 125 | 5.7 – 6.9 | 5.7 – 6.4% |
| Diabetes | ≥ 126 | ≥ 7.0 | ≥ 6.5% |