Blood Alcohol Calculator

Estimate your blood alcohol content (BAC)

🔒 Files never leave your browser
1 standard drink = 12 oz beer (5%) = 5 oz wine (12%) = 1.5 oz spirits (40%)

This tool is for informational purposes only. BAC varies based on many factors. Never drink and drive. Consult a healthcare professional.

How to Use Blood Alcohol Calculator

Enter details

Select gender and enter weight.

Add drinks

Enter number and type of drinks consumed.

Set time

Enter drinking duration to get BAC estimate.

Why Choose AllTools Blood Alcohol Calculator?

  • ✓ Widmark formula
  • ✓ Multiple drink types
  • ✓ Time-based metabolism
  • ✓ Impairment levels
  • ✓ Legal limit comparison
  • ✓ No data stored

Why Use This Tool

  • ★ Your health data never leaves your device
  • ★ Completely free with no usage limits
  • ★ No account or registration required
  • ★ Based on established medical formulas and guidelines
  • ★ Not a substitute for professional medical advice

Related Resources

Calculate age → Convert units → Countdown timer →

Frequently Asked Questions

How accurate is the BAC estimate? ▼
This uses the Widmark formula which provides an estimate. Actual BAC varies with food, metabolism, medications, and other factors.
Is there a file size limit? ▼
No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.
Which browsers are supported? ▼
All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.
Can I use this offline? ▼
Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.
Is my data secure? ▼
Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.
Does this work on mobile? ▼
Yes. All AllTools tools are fully responsive and work on phones and tablets.

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