Estimate Your Blood Alcohol Level

Alcomato uses a medically-informed simulation model to estimate your BAC based on your body profile, drinking timeline, and food intake. Enter your details below to get started. Remember: this is an estimate only and should never be used to decide whether you are safe to drive.

Full BAC Calculator & Guide

Your Profile

⚫ Sex

⚖ Weight

lbs

154 lbs

┃ Height

ft in

5' 7"

📅 Age

years

↑ Alcohol Tolerance

Drinking Timeframe

🕑 Start time

📅 End time

Food Intake

How much did you eat before/while drinking?

☕

Empty

Barely ate

🍴

Little

Snacks only

🍕

Normal

Regular meal

🥣

A Lot

Full meal

Food slows alcohol absorption and can reduce peak BAC by up to 30%

What did you drink?

Your Results

MINIMAL

0.00‰

Current Blood Alcohol

This is an estimate only. Do not drive or operate machinery if you have consumed alcohol. Individual metabolism varies significantly.

↑ Peak Permille

0.00 ‰

🕐 Estimated Sober

Now

Based on average metabolism rate

Hour-by-Hour Breakdown

Frequently Asked Questions

How accurate is this calculator?

Alcomato uses a medically-informed simulation model (Widmark formula with Watson TBW correction) that accounts for your sex, weight, height, age, and tolerance. However, individual metabolism varies significantly — treat results as estimates only.

What is BAC / Permille?

BAC (Blood Alcohol Concentration) measures the amount of alcohol in your bloodstream. It can be expressed as a percentage (BAC %) or in permille (‰). 0.08% BAC equals 0.8‰ permille.

Does food really affect BAC?

Yes. Eating before or while drinking slows alcohol absorption from the stomach into the bloodstream. A full meal can reduce your peak BAC by up to 30% compared to drinking on an empty stomach.

Can I use this to decide if I'm safe to drive?

No. This calculator provides estimates only. Many factors affect your actual BAC including medications, hydration, and health conditions. If you have consumed any alcohol, do not drive.

What does tolerance level mean?

Tolerance affects your alcohol metabolism rate. Regular drinkers metabolize alcohol faster due to increased liver enzyme activity. Choose "Low" if you rarely drink, "High" if you drink frequently.

How long does alcohol stay in your system?

Alcohol is typically metabolized at a rate of about 0.15‰ per hour, but this varies based on weight, sex, liver health, and drinking frequency. Even after you feel sober, trace amounts may remain detectable in breath, blood, or urine for hours longer.