Blood Alcohol Concentration (BAC) Calculator
Estimate your BAC over time based on drinks consumed, body weight, and sex.
Enter your details and click “Calculate BAC Timeline” to see results.
Model Details: This calculator uses a Widmark-style calculation with linear absorption (configurable per drink) and a standard elimination rate of 0.015% BAC/hour.
Disclaimer: This is an estimation only. Actual BAC is affected by numerous factors including metabolism, food intake, and hydration. Do not use this calculator to determine fitness to drive or operate machinery.
The Celtic Kane BAC Calculator is a lightweight, browser-based blood alcohol concentration (BAC) estimator that models alcohol absorption and elimination, lets you add multiple drinks with ABV and volume, and visualizes BAC over time using Plotly.js.
Celtic Kane BAC Calculator — What it is and how to use it
What the Celtic Kane BAC Calculator does
The Celtic Kane BAC Calculator provides an on-page estimate of your blood alcohol concentration after one or more drinks. It uses a Widmark-style approach — converting drink volumes and ABV to grams of ethanol, estimating absorption over a short window, and applying a standard elimination rate — then displays a clear BAC-over-time chart powered by Plotly.js. The tool is optimized to fit common WordPress content widths and works responsively between typical sidebars.
Why this calculator helps
People search online for “how much will I have to drink before I’m over the limit?” and “how long until sober?” This tool answers that search intent with visual, interactive output: you enter your weight, choose sex (for body water fraction), add the drinks you consumed or plan to consume (volume and ABV), and the Calculator estimates peak BAC and how BAC falls over time. The Plotly.js chart gives immediate visual feedback: a helpful way to compare different scenarios (for example, changing a 5% beer to a 12% wine).
How the calculator models BAC (brief technical overview)
- Alcohol mass: converts drink volume (ml) and alcohol by volume (ABV%) into grams of ethanol by multiplying by ethanol density (about 0.789 g/ml).
- Absorption window: each drink is linearly absorbed over a configurable absorption time (default 45 minutes). This models how alcohol does not instantly enter the bloodstream.
- Distribution: the Widmark approach divides absorbed alcohol by body water (weight × a sex-dependent r factor) to estimate BAC as a percentage.
- Elimination: a default elimination rate (0.015% BAC per hour) is subtracted across time to model metabolism and clearance.
This approach balances simplicity and realism and is suitable for educational and planning use. It is not a clinical or legal measurement.
Step-by-step — using the Celtic Kane BAC Calculator in WordPress
1. Add the code to your WordPress site
Paste the provided HTML/JavaScript into a WordPress Custom HTML block (or into a safe code snippet plugin). The container is styled with max-width: 720px so it will typically fit cleanly between two sidebars and remains responsive on mobile.
2. Enter your personal data
Set your weight and choose units (kg or lb). Select sex (male/female) — this sets a standard body-water constant (r). These choices influence how alcohol distributes in the body.
3. Add drinks
Click + Add drink for each alcoholic beverage. For each drink, enter:
- Time (HH:MM) — time since the session’s start; 00:00 means at start.
- Volume (ml) — e.g., 330 ml for a beer, 150 ml for a glass of wine.
- ABV (%) — e.g., 5% for a lager, 12% for wine.
- Absorption minutes — how quickly that drink is absorbed (default 45 minutes). Lighter drinks and those with food can be slower.
4. Calculate and interpret results
Click Calculate. The calculator will return:
- Peak BAC (maximum estimated BAC during the session).
- Estimated time of peak after session start.
- Estimated time to be essentially sober (BAC near zero).
The Plotly chart shows BAC as a line with a filled area for quick visual reading.
Tips for better estimates
- Be honest with input values (volume and ABV matter a lot).
- Use realistic absorption times: carbonated drinks or drinking on an empty stomach usually absorb faster.
- Remember elimination varies by individual; 0.015%/hour is an average value — athletes or certain medications can alter metabolism.
Limitations and disclaimers
This calculator is an estimation tool only. It is not a breathalyzer or medical device. BAC depends on many variables not modeled here (for example, genetics, liver function, food intake, medications). Do not use this calculator to decide whether to drive or perform safety-critical tasks. Always follow local laws and guidance, and when in doubt, avoid driving and use a professional test or designated driver.
Disclaimer: The Celtic Kane BAC Calculator provides approximate estimates for informational purposes only. It is not legal, medical, or professional advice. For legal determinations of impairment, use certified testing methods.
Why we used Plotly.js
Plotly.js delivers clear, interactive charts with a small footprint and accessibility features. The library allows smooth rendering of BAC curves, zooming, and quick rendering on mobile and desktop. Because the calculator is placed inside standard WordPress content widths, Plotly’s responsive rendering keeps the visual useful without breaking layout.
Final thoughts
The Celtic Kane BAC Calculator is a practical, embeddable estimator for WordPress sites. It gives users a quick way to explore “what-if” drinking scenarios, visualize BAC over time, and learn how volume, ABV, and timing affect intoxication levels. Remember: always be conservative with alcohol decisions — calculators inform, but common-sense and legal requirements govern safety.
FAQ
Q: Is the Celtic Kane BAC Calculator accurate for legal use?
A: No. This calculator gives approximate values for general educational purposes only. It is not a replacement for certified testing (breathalyzer, blood test) used for legal or medical purposes.
Q: What formula does the tool use?
A: It uses a Widmark-style approach (alcohol grams ÷ (r × weight)) to estimate BAC and subtracts a standard elimination rate (0.015% BAC/hour). Absorption is modeled linearly per drink over a configurable window.
Q: Why are male/female options included?
A: The tool uses different body water distribution constants (r) to reflect typical physiological differences; this influences estimated BAC.
Q: Can I adjust the elimination rate or absorption model?
A: The provided version uses fixed defaults that suit most educational scenarios. Developers can modify the JavaScript to adjust elimination or absorption parameters to match alternative research values.
Q: How should I place this on my WordPress site?
A: Paste the full HTML/JS into a Custom HTML block, or into a code-snippet plugin that safely inserts scripts. The container is sized with max-width:720px to fit between sidebars; adjust the max-width in the CSS if needed for your theme.
Q: Is the code safe to use on my site?
A: The snippet is client-side JavaScript and Plotly from CDN. It does not send personal data to servers. If you have security policies, host Plotly locally or use a CSP-compatible CDN.