Your body eliminates roughly one standard drink per hour, and nothing speeds that up. If you’ve had five drinks, you’re looking at about five hours before the alcohol is fully out of your system. The exact timeline depends on how much you drank, your body size, your sex, and whether you ate beforehand, but the one-drink-per-hour rule is a reliable baseline.
The One-Drink-Per-Hour Rule
Your liver does almost all the work of processing alcohol. It breaks ethanol down into a toxic intermediate compound, then quickly converts that into a harmless substance that eventually leaves your body as carbon dioxide and water. This process runs at a remarkably steady pace: about one standard drink every 60 minutes.
A “standard drink” means 12 ounces of regular beer, 5 ounces of wine, or 1.5 ounces of liquor. If your drinks were stronger or larger than that (a double cocktail, a high-ABV craft beer, a generous pour of wine), each one counts as more than one standard drink. That matters a lot for your timeline. What felt like “three drinks” over dinner could easily have been five or six standard drinks, adding hours to your sobering-up window.
Here’s a rough guide for an average-sized person who stopped drinking at midnight:
- 3 standard drinks: sober around 3 a.m.
- 5 standard drinks: sober around 5 a.m.
- 8 standard drinks: sober around 8 a.m.
- 10 standard drinks: sober around 10 a.m.
These are estimates from when you stop drinking, not from when you started. Alcohol you consumed in your last hour of drinking still needs its full processing time.
Why Some People Sober Up Faster
The one-drink-per-hour average applies broadly, but your personal rate can shift meaningfully based on a few factors.
Body size and composition. Alcohol dissolves in water, so people with more body water (which correlates with more lean muscle mass) dilute it more effectively. A larger person with more muscle will generally have a lower blood alcohol concentration from the same number of drinks. The Widmark factor, which researchers use to estimate blood alcohol levels, is typically around 0.7 for average-weight men and 0.6 for average-weight women. For someone with a higher body fat percentage, it drops further, meaning alcohol concentrates more in the blood.
Biological sex. Men tend to eliminate alcohol faster than women in absolute terms (grams per hour), largely because they have greater lean body mass and larger liver volumes. Women also carry a lower proportion of body water at the same body weight, so they reach higher blood alcohol concentrations from an identical amount of alcohol. The practical difference: a woman and a man who weigh the same and drink the same amount will not sober up on the same schedule. She’ll start at a higher peak and may take longer to come back down.
Age. As you get older, your proportion of lean muscle decreases and body fat increases. Since body water drops along with it, older adults distribute alcohol into a smaller water volume, leading to higher concentrations and a potentially longer clearance time.
Food Makes a Real Difference
Eating before or while you drink doesn’t help you sober up faster once alcohol is already in your bloodstream, but it significantly affects how drunk you get in the first place. Food slows the movement of alcohol from your stomach into your small intestine, where most absorption happens. That delay gives your liver more time to start processing alcohol before it all hits your blood at once, resulting in a lower and later peak blood alcohol level.
This is why drinking on an empty stomach hits so much harder. Without food, alcohol rushes into your small intestine and gets absorbed rapidly. You reach a higher peak concentration, which then takes longer to come all the way back down to zero. So while food doesn’t change your metabolism rate, it can effectively shorten your total “undrunk” timeline by keeping your peak lower.
Coffee, Cold Showers, and Other Myths
Nothing you do after drinking will make your liver work faster. Coffee, cold water, exercise, fresh air, vomiting: none of these reduce your blood alcohol level. Time is the only thing that clears alcohol from your system.
Caffeine deserves special attention because the myth is so persistent. Coffee can make you feel more alert, which is why people reach for it. But feeling awake is not the same as being sober. Research on mice given the human equivalent of eight cups of coffee after alcohol found they seemed more alert but performed just as poorly on navigating a maze as intoxicated mice who didn’t get caffeine. In humans, a large dose of caffeine may partially counteract alcohol’s effect on memory, but dizziness and impaired judgment remain.
The danger with coffee is that it tricks you into thinking you’re more capable than you are. You feel less drowsy, so you assume you’re fine to drive. Your blood alcohol level hasn’t budged.
How Long Alcohol Shows Up on Tests
Even after you feel sober, alcohol or its byproducts can still be detectable. Standard testing windows vary by method:
- Blood test: up to 12 hours
- Breath test: 12 to 24 hours
- Urine test: 12 to 24 hours
These windows can vary based on how much you drank and your individual metabolism. For most people, a moderate night of drinking (three to four standard drinks) will clear a breathalyzer by the next morning. A heavier session could still register well into the following day. If you’re wondering whether you’d pass a breathalyzer the morning after, the math is straightforward: count your standard drinks, note what time you stopped, and add one hour per drink. If that timestamp hasn’t passed yet, you likely still have alcohol in your system.
A Realistic Timeline for a Night Out
Say you go out and have six standard drinks between 8 p.m. and midnight. Your body started processing alcohol from the first sip, so by midnight it may have already cleared two or three of those drinks. That leaves roughly three to four hours of processing still ahead of you, putting you at zero somewhere between 3 and 4 a.m.
But if you had those same six drinks between 10 p.m. and midnight, your body only had time to process about two drinks during that window. You’d have four drinks still in the queue at midnight, meaning you wouldn’t be fully clear until around 4 a.m.
The pattern matters as much as the total. Spreading drinks over more hours gives your liver a head start. Front-loading them means a higher peak and a longer wait. Either way, the math is the same: roughly one standard drink, one hour, no shortcuts.