HbA1c ↔ eAG calculator
Result
7.0% (DCCT)
eAG: ~8.6 mmol/L (~154 mg/dL)
NICE target: ≤48 mmol/mol (6.5%) for most T2DM. ≤53 (7%) if on insulin.
How to use it
- 1
Enter HbA1c in mmol/mol (IFCC). UK/EU labs report in mmol/mol. US labs use %.
- 2
eAG conversion. ADAG study formula: eAG (mg/dL) = 28.7 × HbA1c(%) − 46.7.
- 3
HbA1c limitations. Unreliable in haemoglobinopathies, haemolysis, iron deficiency, and recent transfusion.
When to use it
- Diabetes diagnosis
- HbA1c ≥48 mmol/mol (6.5%) on two occasions = diabetes (WHO 2011).
- Monitoring glycaemic control
- Reflects average glucose over prior 8–12 weeks.
- Patient education
- eAG in mmol/L helps patients relate HbA1c to glucose meter readings.
A reference for clinicians and students, not medical advice. A score supports a decision; it does not make one. Check every result against the patient in front of you and your local protocol.
At a glance
- Specialty
- Endocrinology and metabolism
- Inputs
- 1
- Type
- Formula
