Blood Sugar Converter
Convert blood glucose levels between mg/dL and mmol/L.
Medical Disclaimer: This tool is for informational purposes only. Always consult your healthcare provider for medical advice and interpretation of blood sugar readings.
Fasting Blood Sugar Ranges
Low
<70 mg/dL
<3.9 mmol/L
<70 mg/dL
<3.9 mmol/L
Normal
70-99 mg/dL
3.9-5.5 mmol/L
70-99 mg/dL
3.9-5.5 mmol/L
Prediabetes
100-125 mg/dL
5.6-6.9 mmol/L
100-125 mg/dL
5.6-6.9 mmol/L
Diabetes
≥126 mg/dL
≥7.0 mmol/L
≥126 mg/dL
≥7.0 mmol/L
| Category | mg/dL | mmol/L |
|---|---|---|
| Hypoglycemia (Low) | < 70 | < 3.9 |
| Normal Fasting | 70 - 99 | 3.9 - 5.5 |
| Prediabetes | 100 - 125 | 5.6 - 6.9 |
| Diabetes | ≥ 126 | ≥ 7.0 |
After Meal Blood Sugar (2 hours)
| Category | mg/dL | mmol/L |
|---|---|---|
| Normal | < 140 | < 7.8 |
| Prediabetes | 140 - 199 | 7.8 - 11.0 |
| Diabetes | ≥ 200 | ≥ 11.1 |
Conversion Formula
mg/dL to mmol/L: divide by 18.0182
mmol/L to mg/dL: multiply by 18.0182
The conversion factor of 18.0182 comes from the molecular weight of glucose (180.16 g/mol) divided by 10.
Which Unit is Used Where?
| Unit | Countries |
|---|---|
| mg/dL | USA, Japan, France, Egypt, Colombia |
| mmol/L | UK, Canada, Australia, China, most of Europe |
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