HbA1c to Average Blood Sugar Calculator | DocSetSugar
Ghost Excerpt
Most people have no idea what their HbA1c actually means in daily blood sugar numbers. A physician who reversed 14.2% to 5.3% explains — with an instant converter in both mg/dL and mmol/L.
Free Medical Calculator
HbA1c to Average Blood Sugar Converter
Instantly understand what your HbA1c means in the glucose units you actually use — mg/dL and mmol/L. The same conversion I ran the night my glucometer read 420 mg/dL.
Enter Your HbA1c
Drag the slider to your HbA1c value and press Convert. The ADA-validated ADAG formula runs instantly.
<5.7%Normal
5.7–6.4%Prediabetes
≥6.5%Diabetes
Avg. Blood Sugar
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mg/dL (US standard)
Avg. Blood Sugar
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mmol/L (UK / AU)
HbA1c Reference Benchmarks
Where key clinical thresholds — and my personal journey — sit on the scale.
5.3%My current level ✓
5.7%Normal upper limit
6.4%Prediabetes max
7.0%ADA diabetes target
9.0%High-risk zone
14.2%My Day 1 — reversed
How I Got From 14.2% to 5.3% in 75 Days
No medication. Evidence-based fasting, a strict low-glycemic-load diet, and structured post-meal movement. The complete clinical and personal story.
Read My Reversal Story →Frequently Asked Questions
HbA1c (glycated haemoglobin) measures the percentage of haemoglobin in your red blood cells that has glucose permanently bonded to it. Because red blood cells live for roughly 3 months, HbA1c reflects your average blood sugar over that entire period — not just a single snapshot. An HbA1c of 7.0% means approximately 7% of your haemoglobin is coated in glucose.
This calculator uses the ADA-validated ADAG study formula: eAG (mg/dL) = (28.7 × HbA1c%) − 46.7. To convert to mmol/L, divide by 18.018. This formula was validated across 507 adults with type 1, type 2, and no diabetes in the ADAG study published in Diabetes Care.
The ADA recommends a target below 7% for most non-pregnant adults with diabetes. A target of 6.5% or lower is appropriate for those who can achieve it without significant hypoglycaemia. My personal goal — which I achieved in 75 days — was 5.3%, firmly in the non-diabetic range. Individual targets should be set with your physician.
Yes — I reduced my HbA1c from 14.2% to 5.3% in 75 days through structured water fasting, a very-low-glycemic-load diet, and post-meal walking. The evidence for lifestyle intervention in type 2 diabetes reversal is robust. However, very high starting HbA1c (>10%) carries significant risk if managed without medical supervision — always consult your physician before stopping medication.
If you have diabetes or prediabetes, the ADA recommends testing every 3 months if blood sugar is not well controlled, or every 6 months if you are stable and at target. During my active reversal phase, I tested monthly to track progress closely and adjust my protocol in real time.
Medical Disclaimer
This calculator uses the ADA-validated ADAG study formula and is for educational purposes only. Individual HbA1c-to-glucose relationships vary. eAG is an estimate and is not a substitute for laboratory testing or personalised medical advice from your physician. — Dr. Bilal Khalid (M.D), DocSetSugar.