Ever heard someone say, “I can handle my liquor”? Spoiler alert: that’s not always true. The only reliable way to know when to stop is by understanding your BAC (Blood Alcohol Concentration)—a number that tells you how much alcohol is actually in your bloodstream. And trust us, it matters more than you think.

What Is BAC?

BAC stands for Blood Alcohol Concentration, and it’s measured as a percentage. For example, a BAC of 0.05% means there’s 0.05 grams of alcohol per 100 ml of blood. Sounds small, but it can have big effects.

BAC Breakdown

Here’s what typical BAC levels look like and what they do to your body:

• 0.02%: Slight mood lift, light relaxation
• 0.05%: Mild buzz, reduced alertness
• 0.08%: Legal limit in many countries—loss of coordination and judgment
• 0.10%: Slurred speech, slower reaction time
• 0.15%+: Significant impairment, nausea, potential blackout territory
• 0.20%+: Confusion, vomiting, severe risk of alcohol poisoning

Factors That Affect BAC

• Weight & gender: Smaller bodies process alcohol faster
• Food in your stomach: More food = slower absorption
• Drink type & speed: Shots hit faster than sips
• Mixers & medication: Can increase or mask effects

Even the same amount of alcohol affects people differently. That’s why it’s important to stay alert and self-aware—not just go by how you “feel.”

How to Track Your BAC

• Use apps or online calculators (many are free!)
• Count standard drinks, not glasses
• Know that it takes about 1 hour per drink to metabolize
• Stop drinking well before you hit your limit

When to Say “When”

• You feel unusually dizzy or lightheaded
• You’ve had more than 2–3 drinks in a short span
• You’re skipping food or water
• Friends are giving you “that look”

Saying “I’m done for tonight” isn’t boring—it’s wise. It keeps you sharp, safe, and selfie-ready for brunch tomorrow.

Final Word

BAC is like your alcohol speedometer. You wouldn’t drive a car without checking your speed—so don’t drink without checking your limit. Know when to say when, and you’ll be the one with a great night and a clear memory.