Blood Sugar & A1C Converter
Convert blood glucose between mg/dL and mmol/L, and HbA1c to estimated average glucose (eAG) — with the ADA diagnostic ranges.
For general information only — not medical advice. Results are estimates; talk to a doctor or qualified health professional about your own health.
How to use
- 1Choose the conversion.
- 2Enter the value from your meter or lab report.
How it's calculated
mmol/L = mg/dL ÷ 18.016. eAG (mg/dL) = 28.7 × A1C − 46.7 (ADAG study). A1C in mmol/mol = (A1C% − 2.15) × 10.929.
Frequently asked questions
What A1C is normal?
Below 5.7% is normal, 5.7–6.4% indicates prediabetes, and 6.5% or higher on two tests indicates diabetes (ADA).
What's a normal fasting glucose?
Below 100 mg/dL (5.6 mmol/L). 100–125 mg/dL is prediabetes; 126 mg/dL (7.0 mmol/L) or higher on two tests suggests diabetes.
Which countries use mmol/L?
The UK, Canada, Australia and most of Europe use mmol/L; the US uses mg/dL.