International Blood and Breath Alcohol Conversions
Select Country and Specimen then enter reported concentration below:

Country Specimen Concentration Units Legal Limit  
  - Information:
  • There is no safe limit when it comes to driving after drinking alcohol. Alcohol impairment begins at concentrations far below the legal limits of most countries.
  • The legal limits are for adult drivers and may not reflect the law at every location. Commercial operators must use the legal limits for their country and mode of transportation.
  • Changes or additions to countries must be sent to James Earnest, Knowledge Management Research Team Coordinator at the FAA. The country's name, legal limit in that country‚Äôs reporting units for BAC, BrAC, and BAC/BrAC ratio are required. Last updated 07/15/2016

- Acknowledgments:
  • This information is distributed under the sponsorship of the NSC and the ADID in the interest of information exchange.
  • The equations and software used in this web page were provided by the Federal Aviation Administration's Civil Aerospace Medical Institute, Aerospace Medical Research Division.

- Disclaimer:
  • The NSC, ADID, and FAA assume no liability for the contents or use thereof.