HbA1c to Average Blood Sugar Calculator
Health & FitnessConvert HbA1c to an estimated average blood glucose level, and see diabetes diagnostic ranges.
Estimated Average Glucose
Estimated average blood glucose over the past ~3 months. Educational reference only, not a substitute for clinical judgment.
Category
Normal
General category based on standard diagnostic thresholds.
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Odeh Ahwal0people find this calculator helpful
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Frequently Asked Questions
What does HbA1c actually measure?
HbA1c measures the percentage of hemoglobin that has glucose attached to it, reflecting average blood sugar levels over roughly the past 2 to 3 months, since that is how long red blood cells typically persist in circulation.
What HbA1c level indicates diabetes?
An HbA1c of 6.5% or higher is generally used as a diagnostic threshold for diabetes, 5.7% to 6.4% is considered prediabetes, and below 5.7% is considered normal.
Why is HbA1c useful compared to a single blood sugar reading?
A single blood sugar reading only reflects that moment, while HbA1c reflects a longer-term average, making it less affected by short-term factors like a recent meal or acute illness.
Is this calculator a substitute for medical advice?
No. This is an educational reference implementation of the standard HbA1c-to-average-glucose formula, not a substitute for a physicians clinical assessment or an official diabetes diagnosis.
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