| Determine Your Tolerance | Results | |
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| Weight: |
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| Sex: | ||
| Metabolic rate: | ||
| Elapsed time: |
hrs min |
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| Determined Total Consumed Alcohol | ||
| Type: | ||
| Percent alcohol: |
% |
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| Total servings: | ||
| Alcohol History | ||
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[no alcohol added]
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Purchase a Breathalyzer
This online BAC calculator is good for estimating your BAC level, but your actual BAC will vary depending on a host of different factors, such as your hydration status, recent meals, fluid intake, kidney function, and much more. If you’re interested in buying a breathalyzer to get a more accurate estimation, I would highly suggest the model listed to the right.
| BAC Chart Values | |
|---|---|
| 0.00 – 0.03% | Normal behavior, no impairment |
| 0.03 – 0.06% | Mild euphoria and impairment; decreased inhibitions |
| 0.06 – 0.10% | Buzzed, euphoric, increased impairment |
| 0.10 – 0.20% | Drunk, emotional swings, slurred speech, nausea, loss of reaction time and motor control |
| 0.20 – 0.30% | Confused, nauseated, poor mentation, blackout |
| 0.30 – 0.40% | Possibly unconscious, unarrousable, loss of bladder function, risk of death |
| Above 0.40% | Unconscious, coma, impaired breathing, risk of death |
Important Notes
- If you’re typing in a custom percent alcohol, remember that the proof of an alcohol is double the percent (e.g. 80 proof alcohol is 40%)
- If you’re entering a mixed drink, only count the number of shots you put in (not the drink’s total volume)
- Everyone is different — BAC calculators are merely an estimate. A breathalyzer or blood test is the only way to have an accurate measurement.
- This calculator assumes the legal limit for driving is 0.08% and 21 years old. Please note that the legal limit for driving may vary depending on state/country and your age.
- All calculations are based on the US Department of Transportation.
my 1st drink and my last drink were roughly 22 hours a part…. i had 200 ml of 40% alcohol a glass of wine 13% and 11 beers 4.15% slept 7 hours and then had another 7 beers 4.15% and quit about 20 hours ago total time 40 and 1 hours… how in the hell do i calculate my bac of of all that?
Why would you want to? Your car keys should be locked up anyway, so doesn’t really matter what your bac is, you are too drunk and foggy to drive for at least 24 hrs.
okay i had 15 beers in 7 hours…. its been 15 hours since last beer and 22 since first. which figure do i enter into bac calculator? doesent my body eliminate alcohol as im consuming it?
Enter 22 hours — as long as you don’t fully eliminate all of the alcohol you’ve consumed, the calculator will show you your BAC from your first drink.
really good calculator. is it downloadable? thanks
Unfortunately, there isn’t a mobile or downloable version at this time.
you guys shouuld definantly make one..this is the most accurate one on the whole internet
The calculator is quite good and correlates within .003 of actual measurements that I get with a new Alcoscan AL7000, which itself has a 10% margin of error. If you give yourself at least a .020 cushion, using this calculator should be safe. That is, if the calculator shows less than .06, you are probably not going to blow .08. But the cops could still give you a DUI charge if they feel like it.
This I the best thing ever never missed a bac while usin this thanks for the people who made it
I have a couple questions. If I on average drink a 12 pack every night and have done so for 5 years, would that constitute a “heavy” drinker? I weigh 150 lbs, and had 12 pints of beer between 4pm and midinght and also ate 2 6inch sub sandwiches while drinking. 20 hours have elapsed since my first beer and 12 hours have elapsed since my last beer. Inputing Heavy drinker results in a BAC of .00, frequent shows a current BAC of .139. Huge difference. Should I split the difference between the 2 results?
There’s really no good ‘rule of thumb’ for determining your alcohol metabolism. Unfortunately, your best bet is to get a breathalizer — this BAC is only for rough estimation.
This calculator is wrong. It assumes that tolerance has some effect on BAC level by using the different categories in metabolic rate. Tolerance does not work that way. Tolerance does not have an impact on BAC the way that Gender, Body Size, Rate of consumption, type of alcohol, quantity of alcohol, and body composition. Assuming all other things are consistent, Someone with a tolerance will still have the same BAC level they just won’t get the same warning signals (i.e., euphoric effect, alcohol induced vomiting, alcohol induced blacking out.) that someone without a tolerance will experience.
It is extremely risky count on if you are choosing a high metabolic rate like frat boy. For example keeping everything the same the difference between Frat Boy (.86 BAC)to Cheap date ( .00 BAC). This is flawed tolerance does not lower your BAC it lowers the response your body has to your BAC. Your body is more “tolerant” to alcohol in your blood (Blood Alcohol Concentration=% of alcohol in your blood) but it is still there and will still come out of your breath when you teak a breathalyzer for a police officer. BE CAREFUL USING THIS!!!
Actually, tolerance is both. Someone may be tolerant and be functional at higher BAC levels. In a similar fashion, however, individuals with chronic alcohol use will also have induction of the hepatic enzymes responsible for metabolizing alcohol. In other words, tolerant drinkers will both be able to tolerate a higher BAC with fewer effects AND have increased metabolic rate.
Celtickane, could you please provide a reference for your comments here.
thanks!
This is the most accurate bac on the internet
so dont complain ..go buy a breathilizer if you dont thinks so
I was thinking about skipping a PBT this morning but I used this calculator and it said I’d be good to go and blow a .000 so I went and I did indeed blow negative. A skipped PBT would’ve been pretty bad so I’m glad I used this calculator to ease my mind.
Can you give me an exact BAC
based on: 193Lbs., Im in very good shape (work out 4-5 days a week), I drink typicly on the weekends around 4-6 beers, Male.
Consumption = 2 Blue Moons (bottles) & 10 Bud Lights (keg beer/12OZ) Time = First beer at 3pm / Last beer at 8:30pm. Had my blood drawn at 2:15 AM. (11 hours from the first beer/ 4 1/2 from my last beer)
Thanks for your help.
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