For most people, 2 to 4 shots of standard liquor within an hour is enough to feel noticeably drunk. But the real number depends heavily on your body weight, biological sex, whether you’ve eaten, and how fast you’re drinking. A 120-pound woman could be legally impaired after just 2 shots, while a 220-pound man might need 5 or more to reach the same point.
What Counts as One Shot
A standard shot is 1.5 fluid ounces of distilled spirits (vodka, rum, whiskey, tequila, gin) at 40% alcohol by volume, which is labeled as 80 proof. That single shot contains the same amount of alcohol as a 12-ounce beer or a 5-ounce glass of wine. If you’re drinking overproof spirits, flavored liqueurs at different strengths, or getting poured something heavier than 1.5 ounces, the math changes quickly.
How Body Weight Changes the Number
Alcohol spreads through the water in your body. The more you weigh, the more water is available to dilute each drink, which means a lower blood alcohol concentration (BAC) per shot. Here’s roughly what different body weights produce after drinking on an empty stomach within about an hour:
- 120 pounds: 2 shots bring BAC to around 0.08–0.09%, already at the legal driving limit. 4 shots push it to roughly 0.15–0.16%.
- 160 pounds: 2 shots produce a BAC of about 0.06–0.07%. It takes 3 to 4 shots to reach 0.08–0.13%.
- 200 pounds: 2 shots land around 0.05%. You’d likely need 4 to 5 shots to hit 0.10–0.13%.
- 240 pounds: 2 shots produce only about 0.04–0.05%. Even 5 shots may keep you near 0.09%.
These are estimates, not guarantees. Individual variation is real, but the pattern is consistent: lighter people get drunk faster on fewer drinks.
Why Women Typically Feel It Sooner
At the same body weight, women generally reach a higher BAC than men after the same number of drinks. The main reason is body composition. Women carry proportionally more body fat and less water than men of equivalent weight, so there’s less fluid to dilute the alcohol. A 140-pound woman drinking 3 shots may reach a BAC around 0.11%, while a 140-pound man drinking the same amount lands closer to 0.10%. The gap widens with more drinks. Whether differences in the enzymes that break down alcohol in the stomach also play a role is still debated, but the body-water difference alone is enough to create a meaningful gap.
What “Drunk” Actually Feels Like at Each Level
BAC is the most objective way to define intoxication, and it maps to a predictable set of effects:
- 0.02–0.04%: Mild relaxation, slightly altered mood, subtle loss of judgment. Most people feel “a little buzzed” but not drunk. This is typically 1 shot for a smaller person or 1 to 2 for a larger one.
- 0.05–0.08%: Lowered alertness, reduced inhibition, impaired judgment and muscle coordination. You’ll feel it. In every U.S. state except Utah (which uses 0.05%), a BAC of 0.08% is the legal limit for driving.
- 0.10–0.15%: Slurred speech, slowed thinking, reduced reaction time, loss of balance, possible nausea. Most people would call this “drunk.”
- 0.15–0.30%: Confusion, vomiting, drowsiness, significant loss of muscle control. This is heavy intoxication and can be dangerous.
- 0.30–0.40%: Loss of consciousness, risk of alcohol poisoning, and potential death. At this range, the parts of the brain controlling breathing, heart rate, and temperature can begin shutting down.
How Drinking Speed and Food Change Everything
Your liver processes alcohol at a fairly fixed rate: roughly one standard drink per hour for an average-sized person. That means if you take 3 shots in 15 minutes, your body has barely started clearing the first one before the second and third pile on. Spacing those same 3 shots over 3 hours, however, gives your liver time to keep up, and you may never feel more than mildly buzzed.
Eating before or while you drink slows the rate alcohol enters your bloodstream. Solid food is more effective than liquid meals because it slows how quickly your stomach empties its contents into the small intestine, where most absorption happens. A full meal before drinking can meaningfully reduce your peak BAC compared to drinking the same amount on an empty stomach. Some research also suggests food increases the rate your body eliminates alcohol. The practical takeaway: 3 shots after a full dinner hit differently than 3 shots on an empty stomach at a party.
Tolerance Is Not Protection
If you drink regularly, you may not feel as drunk after 3 or 4 shots as someone who rarely drinks. But tolerance is a change in how your brain responds to alcohol, not a change in your BAC. Your blood alcohol level is still just as high, your reaction time is still impaired, and your liver is still working at the same pace. Feeling “fine” after several shots when your BAC is elevated is actually more dangerous, because it can lead you to drink more or to overestimate your ability to drive or make decisions.
When Shots Become Dangerous
Because shots go down fast and the effects take minutes to fully register, it’s easy to overshoot. Alcohol overdose happens when BAC climbs high enough to suppress basic life functions. Warning signs include mental confusion, vomiting, seizures, breathing slower than 8 breaths per minute, gaps of 10 seconds or more between breaths, clammy or bluish skin, inability to wake someone up, and loss of the gag reflex. A person does not need to show all of these symptoms for the situation to be life-threatening.
For a person weighing 140 pounds, 7 to 8 shots consumed quickly could push BAC into the 0.23–0.26% range. For someone at 100 pounds, the same number of drinks could produce a BAC above 0.34%, well into the zone where loss of consciousness and death become real possibilities. These are not numbers that require extreme binge drinking to reach, especially when shots are consumed rapidly in social settings.