A1C
6 %
estimatea1c.com / A1C 6
An A1C of 6.0% corresponds to an estimated average glucose of about 126 mg/dL (7.0 mmol/L). That places you in the middle of the prediabetes band (5.7–6.4%) — clearly above normal, clearly below the diabetes threshold of 6.5%.
You may recognize 126 mg/dL as the diagnostic cutoff for diabetes. That cutoff applies to a fasting glucose measurement. Your eAG of 126 is an average across the entire day — meals, nights, everything — which is a different quantity. An all-day average of 126 usually means fasting values in the 100s–110s with higher post-meal excursions, which is exactly the prediabetes picture.
At 6.0% the risk conversation is no longer hypothetical: without changes, a meaningful fraction of people at this level progress to type 2 diabetes within 5–10 years. The encouraging flip side is that prediabetes at this stage is very responsive to weight loss, activity, and diet changes — the same Diabetes Prevention Program results (58% risk reduction) apply.
Because A1C reflects ~3 months of red-blood-cell life, any change you make takes about that long to show up fully in the number. Logging day-to-day readings (or wearing a CGM for a couple of weeks) tells you whether you're winning months before the next lab test does.
| A1C (%) | eAG (mg/dL) | eAG (mmol/L) | IFCC (mmol/mol) |
|---|---|---|---|
| 5.7% | 117 | 6.5 | 39 |
| 5.8% | 120 | 6.6 | 40 |
| 5.9% | 123 | 6.8 | 41 |
| 6.0% | 125 | 7.0 | 42 |
| 6.1% | 128 | 7.1 | 43 |
| 6.2% | 131 | 7.3 | 44 |
| 6.3% | 134 | 7.4 | 45 |
Need a different value? Use the calculator or the full 0.1-step chart.
No. Diabetes is diagnosed at 6.5% and above. 6.0% is prediabetes (the 5.7–6.4% band), meaning elevated risk but not disease.
About 126 mg/dL, or 7.0 mmol/L, averaged across the whole day. This is not the same as the fasting-glucose diabetes cutoff of 126 mg/dL, which applies only to fasting measurements.
A1C reflects roughly three months of average glucose, so changes in diet, activity, or weight need about that long to show their full effect on the number.
SteadyRange logs your glucose and weight, shows time in range and estimated A1C as they move, and exports a clean PDF for your next appointment. Private by default.
Try SteadyRange →Medical disclaimer. This page is general education, not medical advice, and uses population-average formulas (ADAG) to estimate average glucose. Individual factors — anemia, pregnancy, kidney disease, hemoglobin variants — can shift real values. Do not start, stop, or change any medication based on this page. Always consult a qualified healthcare provider about your results, targets, and treatment.