Alculator - BAC Calculator

Alculator is a BAC (Blood Alcohol Content) calculator for responsible drinkers in the United States.

BAC CALCULATION
Calculate your estimated BAC using the Widmark formula. The app shows a confidence range to help you understand the estimate.

TIME TO LEGAL
See when your BAC will drop below your state's legal limit:
• 0.08% - Standard limit
• 0.05% - Utah limit
• 0.04% - Commercial drivers (CDL)
• 0.00% - Under 21 / Zero tolerance

US STATE DUI LAWS
Browse DUI laws for all 50 US states and DC. View BAC limits and penalty information.

DRINK DATABASE
Select from 99+ drinks including beers, wines, spirits, cocktails, and hard seltzers. Add custom drinks as needed.

OFFLINE MODE
Works without internet. All data stays on your device.

FEATURES:
• BAC calculation with confidence range
• Time-to-legal countdown
• Time-to-sober countdown
• State DUI law reference
• Drink database
• Custom drink entry
• Session logging
• Driver modes (Standard/Commercial/Under21)
• Dark mode
• Home screen widgets

DISCLAIMER:
This app provides ESTIMATES only based on the Widmark formula. Individual results vary based on metabolism, health, food intake, medications, and other factors. This is NOT a substitute for a breathalyzer. Never rely solely on this app to determine if you are safe to drive. When in doubt, do not drive.

Download Alculator today and drink responsibly.

Recent changes:
• More accurate BAC and "time until legal" estimates
• Correct countdowns for under-21 limits in every state
• Fresh new look: session gauge, drink illustrations and icons
• The free version now shows a few ads; Pro removes them
• Bug fixes and polish