What's a good A1C?
A1C estimates your average glucose over two to three months. The ranges below explain what counts as typical, and how an estimate from your own readings compares.
In short: Below 5.7% is typical; 5.7–6.4% is prediabetes; 6.5%+ is the diabetes range.
A1C measures the share of your hemoglobin with glucose attached, which reflects your average glucose over roughly three months. The common reference points are below 5.7% (typical), 5.7–6.4% (prediabetes), and 6.5% or above (the diabetes range). People managing diabetes often work toward an individualized target with their clinician.
Between lab draws, you can estimate an A1C-style number from your own average glucose. SteadyRange shows this as an estimated A1C. It uses a published formula and usually lands within a few tenths of a lab result; a gap between the two is normal because they measure related but slightly different things.
An estimate is a guide for spotting trends, not a replacement for a blood test. Your clinician uses a lab A1C alongside the rest of your picture to set targets.