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Endocrinology & Metabolism
HbA1c to Average Glucose
Endocrinology
HbA1c ↔ Average Glucose Converter
ADA ADAG study formula: bidirectional HbA1c and eAG conversion
HbA1c → eAG
eAG → HbA1c
Please enter HbA1c between 3 and 20%.
Please enter eAG between 60 and 600 mg/dL.
✓ Result
Glycemic Spectrum
3%5.7%6.5%8%10%20%

ADA Targets

  • General adult with diabetes: <7.0%
  • Elderly / complex patients: <8.0%
  • Pregnancy: <6.5% (or <6.0% if no hypoglycemia risk)
Reference Table
HbA1c (%)eAG (mg/dL)eAG (mmol/L)Category
5.0975.4Normal
5.71176.5Prediabetes threshold
6.01267.0Prediabetes
6.51407.8Diabetes threshold
7.01548.6ADA target
8.018310.2Poor control
9.021211.8Very poor control
10.024013.3Very poor control
Formula — ADAG Study, ADA 2008
eAG (mg/dL) = 28.7 × HbA1c(%) − 46.7
eAG (mmol/L) = eAG(mg/dL) ÷ 18.018
HbA1c(%) = (eAG + 46.7) ÷ 28.7

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