| Determine Your Tolerance | Results | |
|---|---|---|
| Weight: |
|
|
| Sex: | ||
| Metabolic rate: | ||
| Elapsed time: |
hrs min |
|
| Determined Total Consumed Alcohol | ||
| Type: | ||
| Percent alcohol: |
% |
|
| Total servings: | ||
| Alcohol History | ||
|
[no alcohol added]
|
||
| 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.
Please note that I just made a bugfix to the Javascript — the calculator was making an incorrect conversion to kilograms (if kilograms were selected). The bug is fixed now.
I removed ‘typical mixed drink’ from the drinks list — it was unclear whether you add the volume of the mixed drink or the volume of the alcohol added. To calculate mixed drinks, just add in the volume of alcohol added.
You should amend this program to account for different laws in different countries. The legal limit in many parts of the world is 0.05, not 0.08 like in the USA, so you could be liable for a lawsuit for giving misleading information in the “time until you can drive” column. Failing that, you need to add a legal disclaimer.
Inaccurate. Th heavier the drinker you are the slower alcohol metabolizes in your system. You won’t *feel* drunk sooner because of higher tolerance.
While it is true that alcohol tolerance increases, the hepatic metabolism of alcohol also increases. Over time, a heavy drinker will be able to clear more alcohol per hour than a normal drinker because a heavy drinker’s liver will induce more enzymes to break down alcohol.
Great calculator, good layout
*** IF YOU COULD MAKE THIS AN APPLICATION FOR SMART PHONES ***
You could make thousands and thousands of dollars.
genius
hear, hear!!!
Great page. Could you go into more detail on the metabolic rates you have listed to choose from. Can the human body actually metabolize alcohol that fast ie: “frat boy”
Hi,
My company does occasional breathalyser checks, due to 0.00% tolerance.
A mail was sent out today, regarding someone being fired because they were 0.25% over the limit. However, they didn’t say which unit of measurement was used. Is B.A.C always used for breath tests ?
Thanks,
Chris
This is the best! It may be inaccurate in many ways but generally it gives a good idea to people who have no idea how drunk they are. It is also useful if you are planning to get drunk and want to know how much to drink to get the desired feeling. Which may sound stupid but it stops overdoses.
Thanks for this
This bac calcutator is fairly competant.The best online calculator I have seen is The fatal vision bac, were they calculate your bac and then give you a graph of the time you started drinking,to the time you will be completly sober
Very impressive. I was originally tempted to agree with the fellow who said that your tolerance doesn’t affect your BAC. A high tolerance makes you more in control at a high BAC, but I didn’t know that the metabolism develops to process alcohol faster for regular drinkers. The veracity of the calculator can by seen by choosing “0″ as the time. Then the BAC result IS independent of tolerance selection.
I’m working on some drinking related tools too. I have a long ways to go to reach your level of sophistication. Thanks for linking to the math. – Happy