Blood alcohol content
Metric of alcohol concentration in blood
Why this is trending
Interest in “Blood alcohol content” spiked on Wikipedia on 2026-07-20.
Categorised under Geography & Places, this article fits a familiar pattern. wt.cat.geography.2
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Key Takeaways
- Blood alcohol content ( BAC ), also known as blood alcohol concentration or blood alcohol level , is the concentration of alcohol in a person's blood, measured for legal or medical purposes.
- In the United States and many other countries, it is commonly reported as a percentage, such as 0.
- Legal limits for driving vary by country, ranging from zero tolerance policies to 0.
- Units of measurement BAC is the mass of alcohol per unit volume of blood.
- Reporting conventions vary by country.
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Source summary
WikipediaBlood alcohol content (BAC), also known as blood alcohol concentration or blood alcohol level, is the concentration of alcohol in a person's blood, measured for legal or medical purposes.
BAC is expressed as the mass of alcohol per unit volume of blood. In the United States and many other countries, it is commonly reported as a percentage, such as 0.08% (equivalent to 0.8 g/L). Legal limits for driving vary by country, ranging from zero tolerance policies to 0.08%. Levels above 0.40% (4 g/L) may be fatal.
BAC is the mass of alcohol per unit volume of blood. The SI unit is kilogram per cubic metre (kg/m3), though it is commonly reported as grams per liter (g/L). Reporting conventions vary by country.
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