Blood Glucose Conversion Formula:
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Blood glucose concentration can be measured in two different units: milligrams per deciliter (mg/dL) and millimoles per liter (mmol/L). This calculator converts between these two commonly used units in clinical practice.
The conversion formula for blood glucose is:
Where:
Explanation: The conversion factor 18 comes from glucose's molecular weight (180 g/mol) divided by 10 to account for the deciliter to liter conversion.
Details: Understanding both measurement systems is crucial for healthcare professionals working internationally, interpreting research from different regions, and ensuring accurate medication dosing and treatment decisions.
Tips: Enter blood glucose value in mg/dL. The calculator will automatically convert it to mmol/L. Values must be positive numbers.
Q1: Why is the conversion factor 18?
A: The factor 18 comes from glucose's molecular weight (180 g/mol) divided by 10 to convert between deciliters and liters.
Q2: Which countries use which units?
A: mg/dL is primarily used in the United States, while mmol/L is used in most other countries including Canada, UK, Australia, and European nations.
Q3: What are normal blood glucose ranges?
A: Fasting: 70-100 mg/dL (3.9-5.6 mmol/L); 2 hours postprandial: <140 mg/dL (<7.8 mmol/L).
Q4: Does this conversion work for other substances?
A: No, this specific conversion factor (18) is only for glucose. Other substances have different molecular weights and require different conversion factors.
Q5: How accurate is this conversion?
A: The conversion is mathematically exact. However, clinical interpretation should consider measurement variability and individual patient factors.