How Long Does It Take to Sober Up?

Alex Harmon · Updated June 2026 · Reviewed for accuracy

Published June 2026 · 8 min read

There's a simple, frustrating answer to this question: time is the only thing that sobers you up. Not coffee. Not water. Not sleep or a cold shower. Your liver processes alcohol at a fixed rate, and nothing you do speeds that up.

But "it takes time" isn't very useful on its own. What you probably want to know is: how much time, exactly? That depends on how much you drank, your weight, your sex, and when you started. This guide walks you through the real numbers.

How Your Body Processes Alcohol

When you drink, alcohol is absorbed through the stomach and small intestine into your bloodstream. From there, your liver does the heavy lifting — it's responsible for metabolizing about 90-95% of the alcohol you consume. The remaining 5-10% leaves your body through breath, sweat, and urine (which is how breathalyzers work).

The liver uses two enzymes — alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) — to break alcohol down into acetaldehyde and then into acetate, which your body can safely process. The catch: your liver can only handle a fixed amount per hour. On average, it eliminates approximately 0.015% BAC per hour, regardless of how much you drank or how fast you want it gone.

This rate is roughly equivalent to one standard drink per hour (where one standard drink = 14g of pure alcohol in the US, or about one 355ml beer at 5%, one 150ml glass of wine at 12%, or one 44ml shot at 40%).

How Long Does It Actually Take?

Here's the math. Take your starting BAC, divide it by 0.015, and that's the number of hours until you reach zero. Some common examples:

These are estimates. Individual variation matters — genetics, liver health, body composition, medications, and even the type of alcohol you drank can shift your actual rate up or down by 10-20%.

Does Your Weight Affect How Fast You Sober Up?

Your weight affects your peak BAC — a heavier person reaches a lower BAC from the same drinks because alcohol distributes across more body mass. But weight doesn't significantly change the rate at which your liver eliminates alcohol. Whether you weigh 60kg or 100kg, your liver still clears roughly 0.015% per hour.

What weight does affect: if a 60kg person and a 100kg person both have 4 drinks, the lighter person will start at a much higher BAC — meaning they have further to come down, and it takes longer to reach zero, even though the elimination rate is the same.

The Myths About Sobering Up Faster

These are the most common "tips" you'll see shared online — and none of them work the way people think.

Coffee

Caffeine is a stimulant that counteracts alcohol's sedative effects, making you feel more alert. It does not reduce your BAC. The result is what researchers call a "wide-awake drunk" — someone who feels capable of driving but whose reaction time and judgment are still impaired. Studies have consistently shown caffeine does not accelerate alcohol metabolism.

Cold Showers

A cold shower triggers an adrenaline response that temporarily sharpens your senses. You'll feel more alert — but your BAC is unchanged. Like coffee, it can create a false sense of sobriety that's actually dangerous.

Eating Food

Eating before or during drinking significantly slows alcohol absorption, which lowers your peak BAC. This is genuinely useful. But eating after you're already drunk does nothing — the alcohol is already in your bloodstream. Food affects absorption, not elimination.

Water

Water is important for staying hydrated and reducing hangover severity, but it doesn't speed up metabolism. Your liver's enzyme activity is the bottleneck, and water doesn't change it.

Exercise

Exercise increases respiration and sweating, both of which help eliminate small amounts of alcohol. But the quantities are negligible — exercise might speed elimination by 1-2% at most, with no meaningful impact on how fast you sober up.

The Morning After: Am I Still Drunk?

Many people are surprised to learn they can still be legally impaired the morning after a heavy night. If you went to sleep at 1am with a BAC of 0.15%, you'd still have measurable alcohol in your system at 9am — around 0.03% — even after 8 hours of sleep. Sleep doesn't metabolize alcohol faster; it just passes the time.

A good rule of thumb: if you had more than 5-6 drinks, wait until at least mid-morning before driving. If you're unsure, use a BAC calculator with your specifics, or simply don't drive.

What Actually Helps

Since you can't speed up your liver, the best strategy is to plan ahead. These things genuinely help:

• Eat a substantial meal before drinking — fat and protein slow absorption significantly
• Pace yourself — one drink per hour keeps your BAC roughly stable
• Alternate with water — helps with hydration, not metabolism, but keeps you from drinking too fast
• Know your numbers — use the BAC calculator before the night starts to set a limit
• Book a ride — if there's any doubt, it's not worth the risk

Frequently Asked Questions