Blood Sugar Converter
This blood sugar converter turns mg/dL into mmol/L and back, the two units glucose meters use around the world. It also estimates average glucose from an HbA1c result.
| Unit | Value | Copy |
|---|
How to use the Blood Sugar Converter
- Type the Value you want to convert.
- Pick the unit it is in under From, and the unit you want under To. The swap button flips them.
- The answer updates as you type. The table below it shows the same value in every other unit, each with its own copy button.
- For HbA1c, pick % HbA1c or mmol/mol HbA1c under From to see the estimated average glucose.
How it works
mmol/L = mg/dL ÷ 18.016 mg/dL = mmol/L × 18.016 eAG (mg/dL) = 28.7 × HbA1c (%) − 46.7 HbA1c (%) = 0.09148 × HbA1c (mmol/mol) + 2.152
18.016 is the molar mass of glucose, 180.16 g/mol, divided by 10, because mg/dL is per 100 mL. The eAG formula comes from the ADAG study (Nathan et al., 2008).
Examples
- 100 mg/dL = 5.55 mmol/L.
- 7 mmol/L = 126.11 mg/dL.
- HbA1c 7% = 154.2 mg/dL (8.56 mmol/L) estimated average glucose.
- 53 mmol/mol = 7.0% HbA1c.
Milligrams per deciliter to millimoles per liter conversion table
| Milligrams per deciliter (mg/dL) | Millimoles per liter (mmol/L) |
|---|---|
| 70 mg/dL | 3.885435 mmol/L |
| 80 mg/dL | 4.440497 mmol/L |
| 90 mg/dL | 4.99556 mmol/L |
| 100 mg/dL | 5.550622 mmol/L |
| 126 mg/dL | 6.993783 mmol/L |
| 140 mg/dL | 7.77087 mmol/L |
| 180 mg/dL | 9.991119 mmol/L |
| 200 mg/dL | 11.101243 mmol/L |
| 250 mg/dL | 13.876554 mmol/L |
| 300 mg/dL | 16.651865 mmol/L |
HbA1c, percent (estimated average glucose) to milligrams per deciliter conversion table
| HbA1c, percent (estimated average glucose) (% HbA1c) | Milligrams per deciliter (mg/dL) |
|---|---|
| 5 % HbA1c | 96.8 mg/dL |
| 5.7 % HbA1c | 116.89 mg/dL |
| 6 % HbA1c | 125.5 mg/dL |
| 6.5 % HbA1c | 139.85 mg/dL |
| 7 % HbA1c | 154.2 mg/dL |
| 7.5 % HbA1c | 168.55 mg/dL |
| 8 % HbA1c | 182.9 mg/dL |
| 9 % HbA1c | 211.6 mg/dL |
| 10 % HbA1c | 240.3 mg/dL |
| 12 % HbA1c | 297.7 mg/dL |
Estimated average glucose (eAG) for common HbA1c results.
Which countries use which unit
The United States, Japan, France, and several other countries report blood glucose in mg/dL. The UK, Canada, Australia, and most of Europe use mmol/L. If you read a study or a meter from another country, divide or multiply by 18 to get a rough figure, or use this converter for the exact value.
HbA1c reflects average glucose over the last two to three months. The eAG figure turns it into the same unit as a meter reading, but it is an estimate; individual results vary.
Limitations
- For general information only. This is not medical advice; ask your doctor about your results.
- The mmol/L factor applies to glucose only, not to cholesterol or other blood tests.
- eAG is an estimate from a population study.
Sources
- D-Glucose, PubChem, National Library of Medicine. The molar mass of glucose behind the 18.016 factor.
- eAG/A1C Conversion Calculator, American Diabetes Association. The estimated average glucose formula from the ADAG study.
- IFCC-NGSP conversion, NGSP. The equation between HbA1c in mmol/mol and in percent.
Frequently asked questions
How do I convert mg/dL to mmol/L?
Divide by 18.016. For example, 180 mg/dL ÷ 18.016 = 9.99 mmol/L.
How do I convert mmol/L to mg/dL?
Multiply by 18.016. For example, 5.5 mmol/L × 18.016 = 99.09 mg/dL.
What average glucose does an HbA1c of 6.5% mean?
About 140 mg/dL (7.8 mmol/L), using eAG = 28.7 × 6.5 − 46.7.
Can I use this factor for cholesterol?
No. Cholesterol uses a different factor (38.67), because its molar mass is different.