HbA1c ↔ Blood Glucose Converter
Bidirectional conversion · ADA 2023 Classification & Target Guidance
Conversion direction
HbA1c → Blood Glucose
Enter HbA1c % to get avg glucose
Blood Glucose → HbA1c
Enter avg glucose to get HbA1c %
Enter HbA1c value
% (e.g. 5.7 to 14.0)
Patient type
General adult
Elderly (65+)
Pregnant
CKD / Renal
CVD history
Previous HbA1c (optional — for trend analysis)
Leave blank if not available
Typically tested every 3 months
ⓘ HbA1c reflects average blood glucose over the past 2–3 months. A single fasting glucose test shows only that moment — HbA1c gives the complete picture of long-term sugar control.
Please enter a valid value.
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HbA1c
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eAG (mg/dL)
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eAG (mmol/L)
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Your target
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HbA1c classification spectrum
HbA1c target for your patient type
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Trend analysis
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Clinical flags
ⓘ For clinical decision support only. Not a substitute for physician judgment.
eAG formula: eAG (mg/dL) = 28.7 × HbA1c − 46.7 (Nathan DM et al., Diabetes Care 2008;31:1473–1478).
Classification per American Diabetes Association Standards of Medical Care 2023.
HbA1c may be unreliable in haemoglobinopathies, haemolytic anaemia, and certain other conditions.
Targets are individualised — consult treating physician for patient-specific goals.