HbA1c Calculator

Estimate HbA1c to average glucose. Educational screening only — not medical advice.

Glycemic Conversion

ADAG Study
Reflects 90-120 day weighted serum glucose baseline
Bidirectional synchronous calculation
Estimated Average Glucose
140
mg / dL
Prediabetes / Suboptimal Glycemic Control
International eAG Standard: 7.8 mmol / L
ADA Target Recommendation: < 7.0% for most non-pregnant adults
Estimated Fasting Plasma Glucose: ~126 mg / dL

Educational context

How this calculator works and what the numbers mean

This tool helps you explore HbA1c & eAG using widely published formulas and screening ranges. Results are for learning and self-awareness — they are not a diagnosis and do not replace advice from a qualified clinician.

All math runs in your browser on DoseFirst. Results are rounded for display and meant for learning — not for prescribing, dosing medicines, or making treatment decisions on your own.

Formula used:
eAG (mg/dL) = 28.7 × HbA1c − 46.7

Sources & disclaimer

Where the method comes from and how to use results safely

Reference:

Peer-reviewed guidelines and reference equations commonly cited in public health and clinical education.

Educational use only

DoseFirst calculators are for general education and self-screening. They are not medical advice, do not diagnose conditions, and do not replace care from a qualified health professional.

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