RYGB BAC Calculator

For individuals who have had Roux-en-Y Gastric Bypass surgery

⚠️ CRITICAL WARNING

This calculator provides ONLY a crude, unsafe estimate and must NEVER be used to decide if you can drive.

There is no validated formula that properly accounts for RYGB. This tool uses rough approximations from small studies and may be drastically wrong for your individual physiology.

Safe rule: If you have had more than 1-2 standard drinks, especially with any drunk feeling or memory gaps, do not drive until at least the next day after a full night's sleep, regardless of what this calculator says.

Australian Standard Drink = 10g of pure alcohol (12.5ml)
Enter the number of each drink type you consumed below. The calculator will automatically compute your total standard drinks.

What Did You Drink?

Beer - Light Strength (2.7%)

285ml Pot/Middy - 0.6 std drinks each:

375ml Can/Bottle - 0.8 std drinks each:

425ml Schooner - 0.9 std drinks each:

570ml Pint - 1.2 std drinks each:

Beer - Mid Strength (3.5%)

285ml Pot/Middy - 0.8 std drinks each:

375ml Can/Bottle - 1.0 std drink each:

425ml Schooner - 1.2 std drinks each:

570ml Pint - 1.6 std drinks each:

Beer - Full Strength (4.8%)

285ml Pot/Middy - 1.1 std drinks each:

375ml Can/Bottle - 1.4 std drinks each:

425ml Schooner - 1.6 std drinks each:

570ml Pint - 2.1 std drinks each:

Wine (13%)

150ml Standard Glass - 1.5 std drinks each:

250ml Large Glass - 2.5 std drinks each:

Champagne/Sparkling (12%)

150ml Glass - 1.4 std drinks each:

Spirits (40%)

30ml Shot - 1.0 std drink each:

Total Standard Drinks:

0.0

Estimated BAC (RYGB-Adjusted)

0.000