HbA1c & Estimated Average Glucose
Convert HbA1c to estimated average glucose in mg/dL or mmol/L. Understand your diabetes control in the same units as your glucose meter.
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Target <7% for most adults Reflects 2-3 month average eAG ≈ daily meter average
Ready to run the numbers?
Why: eAG translates HbA1c into familiar glucose units. A 7% A1c corresponds to ~154 mg/dL average glucose.
How: ADAG formula: eAG (mg/dL) = 28.7 × HbA1c − 46.7. Converts between % and mmol/mol.
Run the calculator when you are ready.
✅ Normal
HbA1c 5.2% - No diabetes
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⚠️ Prediabetes
HbA1c 6.0% - At risk
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💚 Well Controlled
HbA1c 6.5% - At target
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🟡 Fair Control
HbA1c 7.5% - Above target
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🔴 Poor Control
HbA1c 9.0% - High risk
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💉 Type 1 Diabetes
HbA1c 7.2% on insulin
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🔬 IFCC Units
HbA1c 53 mmol/mol
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Sample Scenarios
✅ Normal
HbA1c 5.2% - No diabetes
⚠️ Prediabetes
HbA1c 6.0% - At risk
💚 Well Controlled
HbA1c 6.5% - At target
🟡 Fair Control
HbA1c 7.5% - Above target
🔴 Poor Control
HbA1c 9.0% - High risk
💉 Type 1 Diabetes
HbA1c 7.2% on insulin
🔬 IFCC Units
HbA1c 53 mmol/mol
🩸 HbA1c Input
🏥 Diabetes Information
🌿 Lifestyle
⚠️ Existing Complications
Your Results
HbA1c
53 mmol/mol
eAG (mmol/L)
Target HbA1c
Gap to Target
📊 Estimated Glucose Ranges
⚠️ Complication Risk Assessment
📈 Visual Analysis
Time in Range (Estimated)
eAG vs Target
📋 Recommendations
Excellent! At or below target HbA1c
🥗 Nutrition Tips
Follow balanced meal plan with consistent carbohydrate intake
Choose whole grains over refined carbohydrates
Include protein and fiber with each meal
Limit added sugars and sugary beverages
Consider Mediterranean or DASH eating pattern
🏥 Screening Recommendations
Annual dilated eye exam
Annual urine albumin-to-creatinine ratio
Annual lipid panel
Blood pressure monitoring
Disclaimer: This calculator provides estimates based on the ADAG study formula. Individual glucose patterns may vary. Always consult your healthcare provider for diabetes management decisions. HbA1c can be affected by certain conditions (anemia, hemoglobinopathies) that may make eAG less accurate.
For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
🏥 Health Facts
7% HbA1c ≈ 154 mg/dL eAG
— ADAG
HbA1c reflects 2-3 month average
— ADA
Understanding HbA1c and eAG
HbA1c (hemoglobin A1c) reflects your average blood glucose over the past 2-3 months. The estimated Average Glucose (eAG) translates this into units you might see on a glucose meter, making it easier to understand day-to-day glucose control.
HbA1c
- • Reflects 2-3 month average
- • Gold standard for monitoring
- • Reported as % or mmol/mol
- • Target <7% for most diabetics
eAG
- • Same units as glucose meters
- • Easier to understand
- • Calculated from HbA1c
- • mg/dL or mmol/L
HbA1c Reference Ranges
| Normal | <5.7% | <39 mmol/mol | <117 mg/dL |
| Prediabetes | 5.7-6.4% | 39-46 mmol/mol | 117-137 mg/dL |
| Diabetes | ≥6.5% | ≥48 mmol/mol | ≥140 mg/dL |
ADA Treatment Targets
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