HbA1c calculator — average glucose & what your result means
Enter your HbA1c to see your estimated average glucose in both mmol/L and mg/dL, which category it falls into (normal, prediabetes or diabetes), and what an endocrinologist would typically do at that level.
— % HbA1c
Medical disclaimer: This calculator is for general educational purposes only and does not constitute medical advice or a diagnosis. Results are estimates based on the values you enter and standard formulas and reference ranges, which vary between laboratories and between individuals. Always discuss your results with a qualified healthcare professional. If you are experiencing a medical emergency, call 9-1-1.
Get an endocrinologist to review your HbA1c — $45
Upload your HbA1c and related results and get a written opinion from a PGIMER/AIIMS-trained endocrinologist within 6 hours — what your number means, what to test next, and exactly what to ask your GP. No referral needed.
Frequently asked questions
What is HbA1c and what does it measure?
HbA1c reflects your average blood glucose over roughly the past 2–3 months. It is reported as a percentage; a higher value means higher average glucose. It is used both to diagnose and to monitor diabetes.
What HbA1c means prediabetes or diabetes in Canada?
By Diabetes Canada criteria, below 6.0% is normal, 6.0–6.4% is prediabetes, and 6.5% or higher is in the diabetes range (usually confirmed with a second test). The US ADA uses 5.7–6.4% for prediabetes, so borderline values can be labelled differently.
How is HbA1c converted to average glucose?
This tool uses the international ADAG formula: estimated average glucose (mg/dL) = 28.7 × A1c − 46.7, and (mmol/L) = 1.59 × A1c − 2.59. It is an estimate of your average, not a replacement for finger-stick or sensor glucose readings.
Can Ginie Health review my diabetes results?
Yes. A written opinion from a PGIMER/AIIMS-trained endocrinologist costs $45 CAD, delivered within 6 hours, with no referral needed — useful for understanding your HbA1c and planning next steps while you wait for a Canadian appointment.