Blood Glucose Converter & HbA1c Target Calculator
Instantly convert between mg/dL (used in the US, Germany/West, France) and mmol/L (used in the UK, Canada, Australia, Germany/East). Calculate your Estimated Average Glucose (eAG) using the clinical ADAG formula endorsed by the American Diabetes Association (ADA) and Deutsche Diabetes Gesellschaft (DDG).
Measurement Context
Clinical targets shift depending on whether you tested before or after eating.
Milligrams per deciliter. Standard in the United States and Western Germany.
Millimoles per liter. Standard in Britain, Canada, Australia, and Eastern Germany.
Fasting glucose between 100–125 mg/dL (5.6–6.9 mmol/L).
Indicates insulin resistance or prediabetes. Lifestyle changes (dietary fiber, physical activity, weight management) can often prevent progression to Type 2 Diabetes.
ADA & DDG Clinical Blood Sugar Target Chart
| Condition / Timing | mg/dL Range | mmol/L Range | Clinical Assessment |
|---|---|---|---|
| Normal Fasting | 70–99 mg/dL | 3.9–5.5 mmol/L | Optimal healthy fasting |
| Prediabetes (Impaired Fasting) | 100–125 mg/dL | 5.6–6.9 mmol/L | Lifestyle counseling indicated |
| Diabetes Diagnostic Threshold (Fasting) | ≥ 126 mg/dL | ≥ 7.0 mmol/L | Diagnostic on repeat lab testing |
| ADA Pre-Meal Target (Diabetic) | 80–130 mg/dL | 4.4–7.2 mmol/L | Standard ADA non-pregnant target |
| ADA Post-Meal Target (Diabetic 1–2h) | < 180 mg/dL | < 10.0 mmol/L | Target to prevent vascular injury |
| Hypoglycemia Level 1 | < 70 mg/dL | < 3.9 mmol/L | Take 15g fast-acting carbs |
Tired of typing blood sugar numbers or converting mg/dL manually?
Subra Space AI scans your glucometer LCD screen (Accu-Chek®, Contour® Next, OneTouch®, FreeStyle®, and more) instantly using on-device computer vision. It automatically auto-converts between mg/dL and mmol/L, flags pre-meal vs. post-meal trends, and saves everything securely on your phone with 0-byte cloud upload.
Clinical Calculation Notice
This converter provides mathematical unit equivalence ($mg/dL \div 18.0182 = mmol/L$) and estimated average glucose approximations ($eAG = 28.7 \times A1C - 46.7$) based on published clinical trials. It does not replace individualized clinical management or doctor-directed insulin dosing. Never alter insulin, sulfonylurea, or medication dosages based on an online calculator without consulting your treating physician or endocrinologist.