Understanding your result
How the conversion works
mmol/mol = (HbA1c% − 2.15) × 10.929
eAG (mmol/L) = 1.59 × HbA1c% − 2.59
eAG (mmol/L) = 1.59 × HbA1c% − 2.59
HbA1c reflects your average blood glucose over the past 2–3 months. Guide zones: below 5.7% (39) is normal; 5.7–6.4% (39–47) is prediabetes; 6.5% (48) or above indicates diabetes. Many people with diabetes aim for a target around 6.5–7% — yours is set with your clinician.
⚕️ For information only. Only a doctor can diagnose diabetes, using your full results and history. Discuss your HbA1c and target with your GP or diabetes team.
Questions
What HbA1c is diabetes?
An HbA1c of 6.5% (48 mmol/mol) or higher on testing indicates diabetes; 5.7–6.4% (39–47) is prediabetes.
What is eAG?
Estimated average glucose — your HbA1c translated into the everyday mmol/L or mg/dL numbers you'd see on a glucose meter.
Sources
Evidence-based · last reviewed July 2026