Blood Sugar Converter
Convert blood sugar levels between mg/dL and mmol/L.
Includes reference ranges for fasting, post-meal, and A1C equivalents.
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Converted Value
Blood sugar (glucose) conversion between the two most common units of measurement:
mg/dL to mmol/L:
mmol/L = mg/dL ÷ 18.0182
mmol/L to mg/dL:
mg/dL = mmol/L × 18.0182
Normal blood sugar reference ranges:
| Test | Normal | Pre-diabetic | Diabetic |
|---|---|---|---|
| Fasting | <100 mg/dL (<5.6 mmol/L) | 100–125 mg/dL (5.6–6.9) | ≥126 mg/dL (≥7.0) |
| 2hr post-meal | <140 mg/dL (<7.8 mmol/L) | 140–199 mg/dL (7.8–11.0) | ≥200 mg/dL (≥11.1) |
| A1C | <5.7% | 5.7–6.4% | ≥6.5% |
Which unit is used where:
- mg/dL: United States, Japan, France, Germany
- mmol/L: United Kingdom, Canada, Australia, most of Europe
Important: Blood sugar readings can vary by time of day, food intake, stress, and activity. Always consult your healthcare provider for interpretation of your results.