| Determine Your Tolerance | Results | |
|---|---|---|
| Weight: |
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| Sex: | ||
| Metabolic rate: | ||
| Elapsed time: |
hrs min |
|
| Determined Total Consumed Alcohol | ||
| Type: | ||
| Percent alcohol: |
% |
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| Total servings: | ||
| Alcohol History | ||
|
[no alcohol added]
|
||
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.
A couple of days ago I was drinking and kept a tally of how much alcohol of what % I drank. Today, out of curiosity I calculated the amount of actual alcohol I consumed(ml*%alcohol.)
I was wondering if this calculator would still be acurate if I used the adjusted amount and set the alchohol content to 100%. Or are there other problems with what I am trying to do?
What constitutes or how do you classify a frequent drinker, heavy drinker or otherwise, are there any parameters?
I need an explanation
Condsider the following:
180 lbs
social drinker
1 hr
Beer
4.5%
10 can(s) 12 oz
I get BAC of 0.237%
I then put in 10 again and I get 0.49%
It looks like it remembered the first 10 and added the other 10 making 20 beers I think.
Does it not clear previous results or am I not using this BAC correctly.
Also, what is the Recalculate button for. I cannot seem to make it out.
Is there somewhere that explains how to use this caclulator.
Thanks
Sorry
I figured out I have to hit the “Clear Alcohol Total” button before I do a new caclulation.
I still am not sure what the “Recalculate” Button is
You can use the “Recalculate” button if you change and of the parameters (length of time from first drink, tolerance, etc.)
I understand that there is no good rule of thumb for determining alcohol metabolism. Having said that, can you provide any estimations or ‘rules’ that you used to determine the difference between Heavy Drinker and Frat Boy? It seems that many people feel that your calculator is quite accurate, but, as I do not have a breathilizer, it would be helpful to have some rough guidelines to determine where one might fall in the spectrum. Thanks!
I feel the same as Mike. The calculator seems accurate and allows a high degree of precision but the one ‘squishy’ area is the Metabolic rate. For starters, as a female, ‘frat boy’ is still an option. But more seriously, I don’t understand what I’m selecting here. As the difference between “Frequent drinker” and “heavy drinker” is rather great, I feel like the calculator is compromised by a bit of fuzziness that could be cleared up. I drink a lot. Is that ‘heavy’ or ‘frequent’? I don’t know…
I think if you are drinking a 5th a day, you can consider yourself a frat boy. A pint is still a heavy drinker. And so on.
Hello
I love this site and also enjoy drinking beer. I had a dui last year and have the interlock device in my car for 2 years. This calculator is perfect !!! It tells me what my limitations are and if followed one is sober at the end of the hours entered. Bravo Celtic Kane you are a friend for life. Thank Rich
This is good. Would you please release the source code if you’ve decided not to do a mobile app. There is a lot of garbage out there. Your BAC calculator is excellent. One must determine their metabolic rate on their own, but if they go with ‘social drinker’ the results will be in their favor in the majority of cases.
The source code is available as Javascript via “View Source” on the webpage, although I would like attribution if the source code is directly used for any mobile applications.
what is the difference betweet a heavy drinker and a frat boy???????
@steve
The “Metabolic rate” selection has an impact on how long the effects will last (i.e. the ‘x’ axis) and subsequently what your estimated BAC is based on how long you’ve been drinking. If you select “Cheap date”, your BAC calculation will remain much higher after 3hrs of drinking compared to a “Frat boy” because your body takes longer to break down the alcohol.
Define how elapsed time is figured. Some calculators say its from the time you started drinking and others say it from the last drink you consumed? Which is it. Need clarity please.
Elapsed time is the time from your first drink, assuming your alcohol level doesn’t go below zero during the elapsed time