Blood Glucose Unit Converter
Convert blood sugar levels between mg/dL (US/India) and mmol/L (UK/Australia/Canada) instantly. Includes standard fasting and 2-hour postprandial reference ranges. Free, private, no uploads.
Key Capabilities
Bidirectional mg/dL and mmol/L conversion
Enter a glucose value in either unit and get the equivalent instantly using the precise factor of 18.0182 — the same conversion used by clinical laboratories worldwide.
WHO fasting and postprandial reference ranges displayed
The tool shows WHO diagnostic thresholds for normal, pre-diabetic, and diabetic glucose in both unit systems side by side, so you can immediately see where your value falls.
Works offline after first page load
Conversion runs entirely in your browser with no external calls — useful for patients reviewing lab reports in areas with limited connectivity.
How to Use
Choose your input unit
Select mg/dL (India and US standard) or mmol/L (UK, Australia, Canada standard).
Enter the glucose value
Type the number from your lab report or glucometer. The converted value in the other unit appears immediately.
Compare against the reference ranges
Check the displayed WHO reference table to see whether your value falls in the normal, pre-diabetic, or diabetic range for fasting glucose.
Common Use Cases
- Indian patients reading international lab reportsAn Indian patient returning from treatment abroad with a lab report in mmol/L instantly converts each glucose value to mg/dL — the unit their Indian endocrinologist uses.
- Diabetes patients comparing international glucometer readingsA person with Type 2 diabetes who travels internationally and uses a locally purchased glucometer in a different unit system compares daily readings to their home-country targets.
- Medical students comparing research across countriesA student reading an American clinical study (mg/dL) alongside a UK paper (mmol/L) converts freely to compare outcomes on the same scale without switching browser tabs.
Frequently Asked Questions
What is the difference between mg/dL and mmol/L?
Both units measure blood glucose concentration. mg/dL (milligrams per decilitre) is used in the United States and India. mmol/L (millimoles per litre) is used in the UK, Canada, Australia, and most of Europe. To convert: mg/dL ÷ 18.0182 = mmol/L.
What are normal fasting blood glucose levels?
Normal fasting: 70–99 mg/dL (3.9–5.5 mmol/L). Pre-diabetes: 100–125 mg/dL (5.6–6.9 mmol/L). Diabetes: 126 mg/dL or above (7.0 mmol/L or above). These are World Health Organization (WHO) diagnostic thresholds for venous plasma glucose.
Who uses this converter?
Patients who travel between countries comparing lab reports in different units. Indian patients reviewing international medical literature. People with diabetes monitoring their glucose when using devices calibrated in different units.
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