For most people, the body clears about one standard drink per hour. Someone with a blood alcohol concentration (BAC) of 0.10, roughly the level after four or five drinks, would need 5 to 10 hours to reach 0.00. The exact timeline depends on how much you drank, your body size, your sex, and whether you ate beforehand.
The Basic Math of Sobering Up
Your liver does nearly all the work of breaking down alcohol, and it operates at a fixed pace. BAC drops at an average rate of 0.015 per hour, though individual rates range from 0.010 to 0.020 per hour. That means someone who stops drinking at a BAC of 0.08, the legal limit in 49 U.S. states, would take roughly 4 to 8 hours to hit zero. At 0.15, a level where most people feel significantly impaired, you’re looking at 7.5 to 15 hours.
A useful shorthand: for every standard drink you consume, expect about one hour of processing time. One standard drink in the U.S. contains about 14 grams of pure alcohol. That’s a 12-ounce beer at 5% ABV, a 5-ounce glass of wine, or a 1.5-ounce shot of liquor. A strong craft beer or a generous pour of wine counts as more than one standard drink, so your actual number may be higher than you think.
Why It Takes Longer for Some People
Several biological factors shift the timeline in either direction. The biggest ones are body size, body composition, sex, genetics, and whether you’ve eaten.
Women generally reach higher BAC levels than men after drinking the same amount, and they take longer to process it. This comes down to body composition: women on average carry less water and more body fat than men of similar weight, so alcohol is more concentrated in their bloodstream. Hormonal differences also play a role in how quickly the liver works through each drink.
Genetics matter more than most people realize. Your liver relies on two key enzymes to break alcohol down. First, one enzyme converts alcohol into a toxic byproduct called acetaldehyde. Then a second enzyme converts that byproduct into something harmless. Variations in the genes coding for these enzymes are common across different populations and can meaningfully speed up or slow down the entire process. If you’ve ever noticed that alcohol seems to hit you harder or linger longer than it does for friends who drink the same amount, enzyme differences are a likely explanation.
Certain medications can also slow alcohol metabolism, leading to higher BAC levels that last longer. Overall nutrition and liver health round out the picture. A healthy, well-nourished liver clears alcohol more efficiently than one that’s overworked or damaged.
How Food Changes the Timeline
Eating before or while you drink is one of the few things that genuinely makes a difference. Food in your stomach slows the rate at which alcohol passes into the small intestine, where most absorption happens. This means your BAC rises more gradually instead of spiking, which helps your liver keep pace.
The effect is substantial. Eating while drinking can increase the rate of alcohol elimination from your bloodstream by 25 to 45%, according to research from Johns Hopkins. That could shave a couple of hours off the total sobering time after a night of moderate drinking. It won’t prevent intoxication, but it meaningfully reduces how drunk you get and how long it lasts.
What Doesn’t Speed Things Up
Coffee, cold showers, exercise, and fresh air are popular remedies that do nothing to lower your BAC. The CDC is clear on this point: caffeine mixed with alcohol does not reduce alcohol’s effects on your body. Coffee may make you feel more alert, which can actually be dangerous because it masks how impaired you still are. You might feel ready to drive while your BAC tells a very different story.
There is no way to force your liver to work faster. The only thing that sobers you up is time.
Practical Timelines by Number of Drinks
These are rough estimates for an average-sized adult, assuming standard drinks consumed over a couple of hours:
- 2 drinks: approximately 2 to 3 hours to reach 0.00 BAC
- 4 drinks: approximately 4 to 6 hours
- 6 drinks: approximately 6 to 9 hours
- 8 drinks: approximately 8 to 12 hours
- 10 drinks: approximately 10 to 15 hours
These ranges account for natural variation in metabolism rates. If you’re smaller, female, haven’t eaten, or are taking certain medications, lean toward the higher end of each range. If you’re larger, male, and had a full meal, the lower end is more realistic.
Feeling Sober vs. Actually Being Sober
One of the trickiest parts of alcohol metabolism is that you can feel mostly normal while your BAC is still elevated. As your body adjusts to rising alcohol levels over the course of a night, you start to feel less drunk even though your BAC hasn’t dropped much. This is called acute tolerance, and it’s the reason people overestimate how sober they are the morning after heavy drinking.
If you had six or seven drinks and stopped at midnight, your BAC could still be above the legal driving limit at 6 or 7 a.m. The legal limit is 0.08 in every state except Utah, where it’s 0.05. Feeling fine after a few hours of sleep does not mean you’re safe to drive. The math matters more than how you feel.
For anyone trying to plan ahead, the safest approach is to count your drinks, note when you stopped, and give yourself at least one hour per standard drink before getting behind the wheel, ideally longer. If you drank heavily, waiting until the following afternoon is not an overreaction.