BAC vs BrAC: Main Differences

Drivers who have been pulled over for drunk driving may have heard the abbreviations BAC and BrAC but are unsure what they imply. We’ll go through how they’re determined and how they may be influenced. We will also go over BAC devices and blood alcohol levels. Any questions about blood alcohol level or blood alcohol concentration raised by drivers can be addressed here, however, if any readers have more queries, an expert from Clear2Drive can assist.

How is BAC and BrAC Measured?

The two ways of measuring blood alcohol levels in the body are comparable, but there are some significant variances. Let’s take it one step at a time.

Blood Alcohol Concentration (BAC) – A measure of intoxication caused by alcohol. If a person has a blood alcohol concentration (BAC) of.10, or one-tenth of a percent, this signifies that they have 10 g of alcohol per 100 mL of blood or one-part alcohol for every 1,000 parts of blood in their system. In most places, a blood alcohol concentration of .08 is considered legally inebriated, and anything above .40 is possibly lethal. Alcohol BAC levels may be determined through urine or blood tests, or they can be inferred from a breathalyzer test.

Breath Alcohol Concentration (BrAC) – The quantity of alcohol in your system is likewise measured by BrAC, but it does so by measuring alcohol in your exhalations. When you consume alcohol, it enters your bloodstream and is taken to your brain and lungs. When you exhale after drinking, alcohol will be in your breath. A BrAC device will detect the quantity of alcohol in your breath and calculate your Blood Alcohol Concentration.

Even modest quantities of alcohol may cause a failed test when utilizing an ignition interlock device (IID) to detect BrAC. Do you know what your state’s legal BAC (blood alcohol concentration) is? You should be informed of the local drinking and driving laws in order to prevent getting arrested for DWI or a DUI. There is no fundamental distinction between DUI and DWI; various states merely have different names for alcohol-related charges.

effect of bac levels

Blood Alcohol Charts

Many recommendations and BAC charts are available indicating how many drinks you may have and still be under the legal limit for DUI, or DWI, such as one drink per hour, however, these standards are generic and do not account for all changes in body type and metabolism.

While the legal BAC level is a consistent measurement, the effects of alcohol on diverse bodies and personalities are anything but. The easiest approach to prevent driving while drunk is to remain sober if you’re driving, or find another route home if you’re not confident you can drive safely.

BAC Field Sobriety Test

The police may request a test every time someone is pulled over or stopped on suspicion of DUI, or DWI. A field sobriety test, a breathalyzer test, and a blood or urine test are all examples of such tests. Breathalyzer tests, blood tests, and urine tests all measure the amount of alcohol in the body. The legal BAC limit is .08 percent in every state except Utah. The legal limit is .05 percent in Utah.

What to Do If You Failed a BAC Test Recently

If you’ve just failed a breath alcohol test and are facing a DUI charge, Clear2Drive may assist you. Please get in touch with us right away if you need assistance.

A breath alcohol ignition interlock device (BAIID) or (IID) is generally used to detect alcohol in the breath. It determines your breath alcohol level by measuring the quantity of alcohol in the air you exhale.

If you have an ignition interlock device, you must test your BrAC and pass in order to start your vehicle. Your findings might be influenced by a number of things. Of course, drinking is one, but other seemingly harmless actions may also have an influence on your rating, so be cautious.

Your BAC and how you metabolize alcohol may be affected by a variety of factors, including:

Drinking on an empty stomach – Alcohol will enter your system quickly since there is nothing to absorb it. When your stomach is full of food, it keeps the alcohol you drink in your stomach longer, preventing it from traveling as swiftly through your bloodstream. This is why folks who consume alcohol on an empty stomach experience its effects more immediately.

Time – Although everyone metabolizes alcohol differently, spacing out your drinks throughout the night will keep your BAC lower than if you drank them all at once.

Hydration – Many individuals recommend drinking water in between alcoholic drinks. This not only keeps you hydrated, but it also compels you to drink in little increments. This may assist you in keeping your blood alcohol concentration (BAC) within a healthy limit.

Breathing pattern – Holding your breath or hyperventilating (breathing fast) might have an effect on your test findings.

Medication – Prescription pharmaceuticals or other recreational drugs may interact with alcohol, making you more susceptible to its effects.

A blood, breath, or urine test is used to determine the level of alcohol in the blood. It determines the quantity of alcohol present in 1,000 parts of blood. A blood alcohol concentration (BAC) of .08 is considered legally impaired. However, at only .02 percent BAC, individuals begin to experience the effects of alcohol. You may experience poor judgment, distraction or struggle to keep up with tasks.

You should do the following to prevent failing either test:

  1. Drink Responsibly – Staying sober is the greatest way to pass your driving test. However, if you want to drink, spread out your beverages, restrict the amount of drinks you have, and make sure you’re not drinking on an empty stomach.
  2. Rinse and Wait – Because the device is highly sensitive, you should rinse your mouth with water and wait 15 minutes after eating before doing your breath test.
  3. Do NOT Drink and Drive – If you’ve had too much to drink, don’t drive. Instead, arrange safe transport home.


If you’ve previously been convicted of a DUI or DWI and have an ignition interlock device, you must use it to test your breath on a regular basis. Because all failures are recorded, it’s natural to be worried about possible contamination.

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