1. What is Alcohol Concentration Conversion?

This calculator converts alcohol concentration between micrograms per liter (μg/L) and micromoles per liter (μmol/L). The conversion is based on the molecular weight of ethanol (46.07 g/mol).

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• μg/L — Micrograms per liter (mass concentration)
• μmol/L — Micromoles per liter (molar concentration)
• 46.07 — Molecular weight of ethanol (g/mol)

Explanation: The conversion accounts for the molecular weight of ethanol to translate between mass-based and molar-based concentration units.

3. Importance of Alcohol Concentration Units

Details: Different laboratories and countries report alcohol concentrations in different units. Converting between these units is essential for accurate interpretation of results in clinical and forensic settings.

4. Using the Calculator

Tips: Enter the alcohol concentration in μg/L (micrograms per liter). The calculator will automatically compute the equivalent value in μmol/L (micromoles per liter).

5. Frequently Asked Questions (FAQ)

Q1: Why is 46.07 used in the conversion?
A: 46.07 g/mol is the molecular weight of ethanol (C₂H₅OH), which is needed to convert between mass and molar units.

Q2: What are typical alcohol concentration ranges?
A: Legal driving limits vary by country but are typically 0.2-0.8 g/L (blood) or equivalent in breath measurements.

Q3: Does this work for other alcohols?
A: No, this calculator is specific for ethanol. Other alcohols (methanol, isopropanol) have different molecular weights.

Q4: When would I need this conversion?
A: When comparing studies or results from different labs that use different units, or when protocols require specific units.

Q5: How precise is this conversion?
A: The conversion is mathematically exact, assuming pure ethanol. Real samples may contain other substances that could affect measurements.