What this source centre covers
We use official public-health, government, clinical, and peer-reviewed sources where practical. The links below support the site's recurring concepts: standard drinks, alcohol units, BAC and country-specific guidance. They are not a substitute for the source list shown on the page you are reading.
Core calculation and alcohol-information sources
| Source owner | Used for | Where to start |
|---|---|---|
| U.S. National Institute on Alcohol Abuse and Alcoholism (NIAAA) | U.S. standard-drink reference and related educational context. | What Is a Standard Drink? |
| U.S. National Highway Traffic Safety Administration (NHTSA) | BAC and impaired-driving safety context; never used to clear a person to drive. | Drunk Driving |
| Peer-reviewed research | Limits of reconstructed, self-report-based BAC estimates. | Hustad & Carey (2005) validity study |
Country-reference sources
Country pages use local public-health references for displayed standard-drink or unit context. Definitions and guidance are not interchangeable across countries.
| Country or region | Primary reference | Related site page |
|---|---|---|
| United States | NIAAA: What Is a Standard Drink? | U.S. standard drinks |
| United Kingdom | NHS: Calculating alcohol units | UK alcohol units guide |
| Australia | Australian Government: Standard drinks guide | Australia standard drinks |
| Canada | Canadian Centre on Substance Use and Addiction: Canada’s Guidance on Alcohol and Health | Canada alcohol guidance |
| New Zealand | Health New Zealand: Drinking responsibly | New Zealand standard drinks |
| Ireland | HSE: Low-risk alcohol guidelines | Ireland standard drinks |
| Singapore | HealthHub: Alcohol—hazards and benefits | Singapore standard drinks |
How we review and update pages
- Before publishing, we identify the exact user question, the calculation or factual claim, and the strongest practical primary source.
- We check that the source supports the wording, link the source visibly, and date the page review.
- We run a recurring visible-source check for core BAC, standard-drink and country-reference pages. A moved, failed or materially changed source prompts a human review.
- When a formula, source or material statement changes, we update the relevant page and its review date. We do not change a date merely to make a page appear fresh.
Methodology, limits and corrections
The methodology page explains the site's Widmark-style educational estimate, formula inputs and limits. The editorial policy explains the standards for safety, sponsorship and corrections.
If you find a source that has moved, a factual error, or a calculation that needs clarification, email hello@thebaccalculator.com with the page URL and supporting information. Material corrections are made on the affected page; a calculator result is never presented as a clinical measurement.