Blood Sugar Conversion Calculator
Convert blood sugar levels between mg/dL and mmol/L.
Includes reference ranges for fasting, post-meal, and A1C equivalents.
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Blood Sugar Conversion
Blood sugar (glucose) is measured in two different units depending on your country.
Conversion formulas:
mmol/L = mg/dL ÷ 18.0182
mg/dL = mmol/L × 18.0182
Reference ranges:
| Measurement | Normal | Pre-diabetic | Diabetic |
|---|---|---|---|
| Fasting | Below 100 mg/dL (5.6 mmol/L) | 100–125 mg/dL (5.6–6.9) | 126+ mg/dL (7.0+) |
| 2 hrs after meal | Below 140 mg/dL (7.8 mmol/L) | 140–199 mg/dL (7.8–11.0) | 200+ mg/dL (11.1+) |
| Random | Below 140 mg/dL (7.8 mmol/L) | — | 200+ mg/dL (11.1+) |
Which unit is used where:
- mg/dL: United States, Japan, France, Germany, Israel, India
- mmol/L: UK, Canada, Australia, China, most of Europe
A1C to average blood sugar:
Average mg/dL = (A1C × 28.7) - 46.7
| A1C | Average mg/dL | Average mmol/L |
|---|---|---|
| 5.0% | 97 | 5.4 |
| 6.0% | 126 | 7.0 |
| 7.0% | 154 | 8.6 |
| 8.0% | 183 | 10.2 |
| 9.0% | 212 | 11.8 |