BAC Calculator
Estimate your blood alcohol content easily
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Frequently Asked Questions
What is blood alcohol content (BAC)?
Blood Alcohol Content (BAC) measures the percentage of alcohol in your bloodstream. A BAC of 0.08% means 0.08 grams of alcohol per 100ml of blood.
What blood alcohol content is considered drunk?
In most U.S. states, a BAC of 0.08% or higher is considered legally impaired for drivers. Even lower levels can impair judgment and coordination.
What blood alcohol content is lethal?
A BAC of 0.40% or higher is potentially fatal. However, severe impairment can begin at lower levels depending on the individual.
How is blood alcohol content calculated?
BAC is estimated using weight, number of drinks, time, and biological sex. Widmark’s formula is commonly used in calculators.
What is a high blood alcohol content level?
A BAC above 0.15% is typically classified as high and often results in severe impairment, nausea, and potential unconsciousness.
How to lower blood alcohol content?
The only effective way to lower BAC is time. Hydration, rest, and food might ease symptoms but do not speed up alcohol metabolism.
What does blood alcohol content mean legally?
Legally, BAC defines intoxication thresholds, particularly for drivers. Exceeding the limit may result in DUI charges and legal consequences.
How long does it take for blood alcohol content to return to zero?
On average, the body processes 0.015% BAC per hour. It may take 6–8 hours or more to return to 0.00%, depending on the starting level.
Is it safe to drive with a BAC under the legal limit?
Not always. Even a BAC as low as 0.02% can impair concentration and reaction time. Safety should always be prioritized.
Can a BAC calculator replace a breathalyzer?
No. While calculators provide estimates, certified breathalyzers are more reliable for real-time, legal, or medical assessments.