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BAC Estimate — result sheet
Estimate blood alcohol concentration with a transparent Widmark-style planning equation.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Estimated BAC = alcohol grams/(distribution factor x body mass grams) x 100 - 0.015 x hours.
The result displays the assumptions that drive the estimate rather than presenting a legal or measured BAC.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Distribution assumption — 2 choices
- Body weight — kg; minimum 35; maximum 300
- Standard drinks — minimum 0; maximum 20
- Alcohol per drink — g; minimum 1; maximum 100
- Hours since drinking began — hours; minimum 0; maximum 24
Worked example
| Input | Value |
|---|---|
| Distribution assumption | male |
| Body weight | 75 |
| Standard drinks | 2 |
| Alcohol per drink | 14 |
| Hours since drinking began | 2 |
The calculator estimates BAC from 28 grams of alcohol and two hours of elimination.
Assumptions and limits
- A standard drink is whatever alcohol mass the user enters.
- Absorption, food, medications, sex variation, and elimination differ by person.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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