Blood Alcohol Calculator Canada (BAC Level & Legal Limit) 🇨🇦

Use this Canadian blood alcohol calculator to estimate your BAC level, time to sober up, and whether you’re over the 0.08% impaired driving limit. Check your blood alcohol concentration before you drive with SmartBAC.

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ℹ️ Information

CONTEXT
🌎 Country
Show results in
ABOUT YOU
Sex
Weight

Start time of drinking (optional) Time of your first drink (not required)

🕒

🍹🍸🍺 Drinks

Drink {{index+1}} 🍷

🍺 🍷 🥃 🍺 🍹 Standard cocktail usually contains single shot of hard liquor. 🥂
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%

The results will show up here...
📈 Results

Current BAC

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Measured for Now

Legal limit

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Based on Canada law

Elimination rate

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Assumed average

Standard Drinks

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Approx. consumed

pure_alcohol

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pure_alcohol_consumed
For your own safety, we recommend using a rate no higher than the average.
🟢 Status indicators
🔴 Above the legal limit – do not drive.
🟡 Close to the legal limit – driving not recommended.
🟢 Safe to drive, but stay cautious.
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{{ result.time }} {{ result.drunkenness }} {{ result.statusLabel }}
Create a pop-up notification
📉 Sobriety Over Time
👮 Health impact and legal consequences
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Legal limit reached in: {{ legalLimitTimeLabel }} Sober in: {{ sobrietyTime }} Peak BAC: {{ peakBAC }}

💡 Tips: drink water, eat, and avoid driving until you are below the legal limit and ideally sober.

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Attention‼️ The results are only approximate, so make sure you are sober before driving.

About results ▼

📊 Current BAC

Your Current BAC shows your estimated blood alcohol concentration right now as a percentage. This number reflects how much alcohol is in your bloodstream and is used to assess impairment.

🚔 Legal limit

In the United States and Canada, the standard legal driving limit for fully licensed adults is 0.08 % BAC. Exceeding this can result in DUI/DWI penalties, including fines and license actions.

🧪 Elimination rate

This shows the assumed average rate your body metabolizes alcohol — typically ~0.015 % BAC per hour. It’s an estimate of how fast your BAC decreases over time.

🍺 Standard Drinks

The number of Standard Drinks represents the approximate number of typical servings you’ve consumed (e.g., one beer, glass of wine, or shot), based on local standards for drink size.

🧴 Pure Alcohol

This is the amount of pure alcohol (in ounces) your body has absorbed so far, giving you a measure of total alcohol consumed.

⏱ Time vs. Sobriety Table

The table lists how your BAC is expected to change with each hour passed — and when a Start time of drinking is provided, it aligns these estimates with the exact time of day you began drinking. For example, if you started at 6:00 PM, the column will show your projected BAC at 6:00 PM (Now), 7:00 PM (1h), 8:00 PM (2h), etc., so you can clearly see when your BAC is likely to cross legal and safer thresholds as the day progresses. Icons or status indicators show whether the level is safe for driving at those specific clock times, making it easier to plan your departure or rest period.

📈 Sobriety Over Time Graph

A visual line chart plotting your estimated BAC decline over hours. It helps you see when your BAC drops below legal and safer levels.

😵 How Alcohol Affects You

This reference table shows ranges of BAC and typical effects on your body and behaviour — from mild alertness changes to significant impairment at higher levels.

⏰ Legal limit reached in / Sober in / Peak BAC

These summaries give quick key estimates:

  • Legal limit reached in: the time until your BAC likely falls below the legal driving limit.

  • Sober in: total time until BAC reaches ~0.000 %.

  • Peak BAC: the highest BAC value recorded in the session.

Data used for calculations

In order to accurately calculate the effects of alcohol on the body, the following important data are required:

  1. Weight (kg):: Body mass has a direct impact on the absorption of alcohol. Higher weight determines a slower effect of alcohol on the body.
  2. Gender: The bodies of women and men process alcohol differently. Alcohol is broken down more slowly in women's bodies due to a lower amount of enzymes that break down alcohol.
  3. Amount of alcohol consumed (ml): It is necessary to indicate the exact volume of the alcoholic drink consumed in milliliters.
  4. Alcoholic strength (%): This indicator shows the concentration of ethanol in the drink. It is an important factor in determining the total amount of pure alcohol consumed.
  5. The time of the first alcoholic drink (optional): If you do not provide the first-drink time, the calculator presents sobriety relative to the elapsed time (hours passed) since the start of drinking, comparing levels by hours rather than mapping them to specific times of day.

These data are essential for accurately calculating the effects of alcohol on the body and assessing its impact on different individuals.

Drunk Driving in Canada

For drivers 21 years or older:

  • It is illegal to drive with a blood alcohol concentration (BAC) of 0.08% or higher nationwide.
  • Most provinces and territories also impose penalties for BACs as low as 0.05%.

For drivers under 21 years old:

  • Zero tolerance in most provinces and territories (BAC must be 0.00%).

Impaired Driving Laws in Canada

  1. Fines
    • Minimum federal fine: $1,000 for a first offense.
    • Higher fines for repeat or aggravated offenses (no legal limit, but can reach several thousand dollars).
  2. License Suspension
    • First offense: Minimum 1-year suspension (length varies by province and severity).
    • Repeat offenses: Longer suspensions, including permanent revocation in severe cases.
  3. Jail Time
    • Possible for first offenses (up to 10 years for indictable offenses).
    • Mandatory jail time for repeat offenders or injury/death cases.
  4. Community Service
    • May be required as part of sentencing, depending on province and case.
  5. Mandatory Education or Treatment Programs
    • Required before license reinstatement in many provinces and territories.
  6. Ignition Interlock Devices (IID)
    • Frequently required for reinstatement, especially for repeat or high-BAC offenses.
    • Can be mandatory even after a first offense in some provinces.

Tips for Responsible Drinking

  • Limit your alcohol consumption – follow the “one drink per hour” rule.
  • Consume alcohol with meals to slow down its absorption.
  • Drink a glass of water after each alcoholic drink.
  • Do not drive after consuming even a small amount of alcohol.

Source: World Health Organization (WHO).

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