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    BACtrack S80 BreathalyzerBACtrack S80 Breathalyzer
    Best Selling

    BACtrack S80

    $129.99
    BACtrack C8 BreathalyzerBACtrack C8 Breathalyzer
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    BACtrack C8

    $99.99
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    BACtrack C6

    $69.99
    BACtrack Trace BreathalyzerBACtrack Trace Breathalyzer

    BACtrack Trace

    $99.99
    BACtrack Mobile BreathalyzerBACtrack Mobile Breathalyzer
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    BACtrack Mobile

    $99.99
    BACtrack Scout BreathalyzerBACtrack Scout Breathalyzer
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    BACtrack Scout

    $84.99
    BACtrack Element BreathalyzerBACtrack Element Breathalyzer

    BACtrack Element

    $84.99
    BACtrack Go BreathalyzerBACtrack Go Breathalyzer

    BACtrack Go

    $39.99
    BACtrack Keychain BreathalyzerBACtrack Keychain Breathalyzer

    BACtrack Keychain

    $39.99
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    BACtrack Nano

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    BACtrack View iPhone App

    BACtrack View

    With BACtrack View, you can share a video-verified record of your sobriety directly from your smartphone.

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HOW MANY DRINKS
DOES IT TAKE TO REACH 0.08%?

Conventional wisdom says that it should take an "average person" about 3-4 drinks to reach 0.08% BAC... but is that true for you personally? Are you sure?

Factors That Affect BAC

Many people wonder "how many drinks does it take to get legally drunk?", but with so many factors affecting blood alcohol content (BAC), and because alcohol affects everyone differently, the answer will be different for each person. Luckily, a breathalyzer from BACtrack can give you an accurate estimate of your BAC without having to know your age, height, weight, gender, what kind of alcohol you drank etc.

Age

Body Weight

Gender

Metabolism

Fat / Muscle Content

Medications

Type & Strength of Drink

Size of Drink

How Fast You Drink

Food

BACtrack Mobile Smartphone Breathalyzer

Stop Guessing & Start Knowing

Unlike drink charts and online calculators, BACtrack breathalyzers don’t use generalizations or rules of thumb that may not reflect you personally.

Instead, they measure the amount of alcohol actually in your breath and then estimate your BAC, with pro-grade accuracy. No other method is quite so fast, convenient and reliable.

SHOP BREATHALYZERS

WATCH: How Does the Alcohol % in Beer Affect Your BAC?

We asked Kevin to drink several light American lagers (4.2% ABV), while we asked Pat to drank several strong IPAs (6.9% ABV)... you know, for science. We then tracked their BAC for the next four hours. Watch to see the results!
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Free Shipping on All US Orders

We offer free shipping in the Continental US via USPS first class mail. Orders placed by 12pm PST will usually ship the same business day. You can expect to receive your order in 3-7 business days.
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1 Year Warranty

If during the first year of operation any BACtrack unit ceases to function properly, we will repair or replace the defective product at no charge. To obtain warranty service, please contact customer support at 877-334-6876 or support@bactrack.com.
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30-Day Money Back Guarantee

If you are not 100% satisfied with your BACtrack, we'll gladly exchange it or give you a refund for the full purchase price paid, whichever you prefer, within 30 days from the original shipping date.
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Worldwide Shipping

BACtrack ships to most countries around the world. There are additional charges for international orders which will be displayed at time of checkout. Orders will take longer than normal to reach destinations outside the United States.

Find the Right BACtrack For You

BACtrack S80 BreathalyzerBACtrack S80 Breathalyzer
Best Selling

BACtrack S80

$129.99
BACtrack C8 BreathalyzerBACtrack C8 Breathalyzer
New

BACtrack C8

$99.99
BACtrack C6 BreathalyzerBACtrack C6 Breathalyzer
New

BACtrack C6

$69.99
BACtrack Trace BreathalyzerBACtrack Trace Breathalyzer

BACtrack Trace

$99.99
BACtrack Mobile BreathalyzerBACtrack Mobile Breathalyzer
Top Rated

BACtrack Mobile

$99.99
BACtrack Scout BreathalyzerBACtrack Scout Breathalyzer
New

BACtrack Scout

$84.99
BACtrack Element BreathalyzerBACtrack Element Breathalyzer

BACtrack Element

$84.99
BACtrack Go BreathalyzerBACtrack Go Breathalyzer

BACtrack Go

$39.99
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BACtrack Keychain BreathalyzerBACtrack Keychain Breathalyzer

BACtrack Keychain

$39.99
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BACtrack Nano BreathalyzerBACtrack Nano Breathalyzer
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BACtrack Nano

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Read Customer Reviews

Why wouldn't you want to know?

Owning a BACtrack doesn't make you an alcoholic, it makes you a responsible drinker. This should be a no-brainer for who anyone who drinks.

- Lauren from Los Angeles, CA

Easy to use & carry around

This tiny breathalyzer is perfect for on the go. It's easy to use and read. I love having it around with friends after work so everyone can drive safely.

- Katrina from Denver, CO

An Eye Opener

I recently went to a dinner with a friend who got a DWI on the way home. I was very surprised as we only had 1-2 drinks each and shared some wine. I started using a BACtrack and was astonished that my BAC was much higher than I was estimating. The level of drinks or feeling tipsy that I would normally have not driven was actually much higher than 0.08. This device is amazing in that it now helps me clearly understand how many drinks over what period of time I need to be safe.

- Charlie from Cranford, NJ

Super convenient and easy to use

I love having this for mimosas at brunch and dinner and drinks. It helps me keep track of how I'm feeling and whether or not to cut myself off.

- Brunch Queen from Boise, ID

Peace of mind

It's ideal for anyone who is concerned about doing the right thing (for themselves, other road users and their vehicles). Not only does it show when you need to call a driver or get a cab, it also helps you see how and when you react to a drink or two.

- Gaz from Wellington, New Zealand

Money well spent!

Wouldn't go without it after having had one for years now. Even if you only occasionally drink, you should have this. Your results might surprise you!

- Johnny from Lexington, KY

Great for dinner parties

Everyone who's been drinking uses it before they're allowed to leave my house. A literal life saver.

- Alice from Tacoma, WA

So much peace of mind

It has been so educational to own a BACtrack and has helped me to ensure that I am never in a situation where I might endanger myself or others. It has also helped me to better determine the kind of limits I want for myself even when I'm not driving.

- Sam from San Francisco, CA
Read All Breathalyzer Reviews >

Frequently Asked Questions

  • How accurate are BACtrack devices?
  • How often do they need to be calibrated?
  • Which BACtrack is right for me?

BACtrack uses carefully-engineered technology to deliver reliable, consistent BAC results, with unparalleled accuracy.

Several independent agencies have tested commercially available breathalyzers against an evidential police breathalyzer device and found BACtrack is the most accurate. To learn more, click here.

Our general recommendation is that you get your BACtrack calibrated every 12 months or so, but it really depends on how your BACtrack is performing. With proper care and usage, we've seen that our devices can go for 1000's of tests before needing calibration.

All BACtrack products are calibrated in our San Francisco offices by professionally trained technicians. To learn more, click here.

We have a wide range of breathalyzers for every alcohol testing need. You can begin by using the filters on our Store Page to better narrow down your choice. If you're still having trouble, please give us a call at 415-693-9756 and we'd be happy to help you find the right BACtrack for you.

WATCH: Are Personal Breathalyzers Accurate?

FOX 2 Detroit and Allen Park police teamed up for a study including five people drinking alcohol to test a BACtrack C6 keychain breathalyzer against the police-issued machines to see just how accurate personal breathalyzers actually are. SPOILER ALERT: The C6 matched the police breathalyzer every step of the way.

Read More From Our Blog

Can You Trick a Breathalyzer?

Can You Trick a Breathalyzer?

Misconceptions persist about what breathalyzers can and can’t do and how a person might be able to "beat" one in a roadside test. The following...

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How Many Drinks Does it Take to Reach 0.08 %BAC?

How Many Drinks Does it Take to Reach 0.08 %BAC?

In an era of heightened awareness about the perils of drinking and driving, the decimal 0.08 requires no explanation. Smartphone Breathalyzers | Professional Breathalyzers |...

Read More

Factors that Affect BAC

Factors that Affect BAC

Blood alcohol content (BAC) is a measure of the amount of alcohol that is present the blood, based on the volume of alcohol consumed over a...

Read More