Blood Sugar Converter
Convert blood glucose levels between mg/dL and mmol/L.
Fasting Glucose Status: Prediabetes
Reference Ranges
| Category | mg/dL | mmol/L |
|---|---|---|
| Normal (Fasting) | 70–99 | 3.9–5.5 |
| Normal (2h after meal) | < 140 | < 7.8 |
| Prediabetes (Fasting) | 100–125 | 5.6–6.9 |
| Diabetes (Fasting) | ≥ 126 | ≥ 7.0 |
For Informational Purposes Only
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Convert Blood Sugar Levels Between mg/dL and mmol/L
Our Blood Sugar Converter provides a quick and accurate way to translate glucose readings between the two standard units of measurement, mg/dL and mmol/L.
What is a Blood Sugar Converter?
A Blood Sugar Converter is a simple tool that helps individuals, particularly those with diabetes, convert their blood glucose readings between the two most common units: milligrams per deciliter (mg/dL) and millimoles per liter (mmol/L). Since different countries and medical systems use different units, this calculator is essential for understanding health information, research, or readings from different glucose meters.
How It Works: The Conversion Factor
The conversion is based on the molecular weight of glucose. The standard conversion factor is:
1 mmol/L = 18.0182 mg/dL
Our calculator uses this factor to accurately switch between the two units when you enter a value.
Interpreting Your Blood Sugar Levels
The calculator provides a "Fasting Glucose Status" based on American Diabetes Association guidelines. This helps you understand where your fasting reading falls:
- Normal: 70-99 mg/dL (3.9-5.5 mmol/L)
- Prediabetes: 100-125 mg/dL (5.6-6.9 mmol/L)
- Diabetes: 126 mg/dL (7.0 mmol/L) or higher
Frequently Asked Questions
How do you convert blood sugar from mg/dL to mmol/L?
To convert blood sugar from milligrams per deciliter (mg/dL) to millimoles per liter (mmol/L), you divide the mg/dL value by 18.0182. To convert from mmol/L to mg/dL, you multiply by 18.0182. Our converter does this calculation for you automatically.
What are normal blood sugar levels?
For a person without diabetes, a normal fasting blood sugar level is typically between 70 and 99 mg/dL (3.9 to 5.5 mmol/L). Blood sugar levels less than 140 mg/dL (7.8 mmol/L) two hours after eating are also considered normal.
Which countries use mg/dL vs. mmol/L?
The mg/dL unit is primarily used in the United States and a few other countries. The mmol/L unit is the standard in most other parts of the world, including the United Kingdom, Canada, and Australia.
What is the difference between mg/dL and mmol/L?
Both are units for measuring the concentration of glucose in the blood. mg/dL measures the concentration by weight (milligrams per deciliter), while mmol/L measures it by molarity (millimoles per liter).
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