Standard Drink Equivalents
| Drink | Amount | Alcohol |
|---|---|---|
| Regular beer (5%) | 12 oz | 0.6 oz |
| Wine (12%) | 5 oz | 0.6 oz |
| Spirits/Liquor (40%) | 1.5 oz | 0.6 oz |
| Malt liquor (7%) | 8–9 oz | 0.6 oz |
BAC Calculator
Estimate your blood alcohol content (BAC) for awareness and safety. This tool uses the Widmark formula to estimate BAC based on drinks, body weight, gender, and time elapsed. Never drive if you've been drinking.
Blood Alcohol Content Estimator
Frequently Asked Questions
What is a standard drink?
In the US, one standard drink contains 0.6 fluid ounces (14 grams) of pure alcohol. This equals: 12 oz of regular beer (5%), 5 oz of wine (12%), or 1.5 oz of distilled spirits (40%). Many cocktails and craft beers contain more than one standard drink worth of alcohol.
How fast does the body process alcohol?
The liver metabolizes alcohol at roughly 0.015% BAC per hour on average. No amount of coffee, exercise, food, or cold showers speeds this up — only time works. Someone at 0.08% BAC needs approximately 5+ hours to reach 0.00%. Food before drinking slows alcohol absorption but doesn't reduce total alcohol processed.
About the Bac Calculator
This free bac calculator helps you get accurate results instantly without needing to work through the math manually. Whether you need a quick estimate or a precise figure, having a reliable tool on hand saves time and reduces errors compared to manual calculation.
How to Use This Calculator
- Enter your values in the input fields above. Each field is labeled to guide you.
- Double-check your inputs — results are only as accurate as the numbers you enter.
- Click the Calculate button to see your result instantly.
- Use the result for your planning, budgeting, or decision-making.
Why Accurate Calculations Matter
Small errors in math calculations can compound into significant problems. A 1% miscalculation in a budget or measurement can translate to hundreds or thousands of dollars in wasted resources, or result in having to redo work entirely. This calculator uses the standard formulas and methods to give you reliable results you can trust.
Tips for Getting the Best Results
- Use consistent units throughout (all in feet, all in dollars, etc.)
- For estimates, add a 10% buffer to account for real-world variables
- Save your result by taking a screenshot or writing it down before closing the page
- For decisions involving significant money or safety, verify results with a qualified professional
Frequently Asked Questions
Is this calculator free? Yes — completely free with no account, login, or payment required. Use it as many times as you need.
How accurate are the results? This calculator uses the standard formulas for bac calculations. Results are accurate for typical use cases. For specialized or high-stakes applications, consult a professional.
Does it work on mobile? Yes. This calculator is fully responsive and works on smartphones, tablets, and desktops.