Blood Sugar Converter (mg/dL ↔ mmol/L)
Medical-grade calculator for converting blood glucose readings. Features WHO reference ranges and hypoglycemia alerts.
About
Managing diabetes or monitoring metabolic health often requires navigating two distinct measurement standards: the gravimetric unit (mg/dL) used primarily in the United States and Japan, and the molar unit (mmol/L) used internationally. A misunderstanding of these values can lead to dangerous errors in insulin dosage or dietary choices. This tool ensures patient safety by providing accurate conversions using the molecular weight of glucose. It includes visual feedback zones corresponding to clinical definitions of hypoglycemia (low blood sugar), euglycemia (normal range), and hyperglycemia (high blood sugar), helping users instantly contextualize their numbers. Disclaimer: This tool is for informational purposes only and does not constitute medical advice.
Formulas
The conversion depends on the molecular mass of glucose (126C112H166O), which is approximately 180.156 g/mol. In clinical practice, the factor 18 is standard.
To convert from US units to International units:
Reference Data
| Condition | mg/dL Range | mmol/L Range | Action Context |
|---|---|---|---|
| Severe Hypoglycemia | < 54 | < 3.0 | Seek Medical Help |
| Hypoglycemia | 54 - 70 | 3.0 - 3.9 | Consume Fast Acting Carbs |
| Fasting Normal | 70 - 100 | 3.9 - 5.6 | Healthy Range |
| Prediabetes | 100 - 125 | 5.6 - 6.9 | Monitor Diet |
| Diabetes (Fasting) | > 126 | > 7.0 | Consult Doctor |
| Post-Prandial (2h) | < 140 | < 7.8 | Target after Eating |
| High Glucose | 140 - 200 | 7.8 - 11.1 | Hyperglycemia |
| Very High | > 200 | > 11.1 | Ketone Risk |
| Emergency | > 600 | > 33.3 | HHS / DKA Risk |