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Tool: BAC Calculator — 免費線上計算機 | HomeCalcPro | 列印時間:
BAC Calculator — 免費線上計算機 | HomeCalcPro
BAC Calculator精準試算，提供行業標準公式與即時測算結果。
Parameters & Body Metrics
Health & Fitness Targets
Evidence-BasedEnter your parameters above to compute your target metrics.
Widmark Blood Alcohol Formula
Transparent mathematical methodology explained in plain English.
BAC % = [ (Grams Alcohol Consumed / (Weight in Grams × r)) × 100 ] - (Beta × Hours Elapsed)Clinical equation where r is gender body water factor (0.68 for males, 0.55 for females) and Beta is the average metabolic clearance rate of ~0.015% BAC per hour.
Variables Explained:
- Standard Drinks Consumed: 1 standard drink = 14 grams pure alcohol (12 oz beer at 5%, 5 oz wine at 12%, 1.5 oz liquor at 40%).
- Body Weight (kg / lbs): Total body mass.
- Hours Elapsed: Time elapsed since first drink.
Male (80 kg / 176 lbs) Consuming 3 Standard Beers over 2 Hours
Calculating peak BAC and estimated time to 0.00% BAC.
- Gross BAC: (42 g / (80,000 g × 0.68)) × 100 = 0.0772%.
- Metabolized in 2 Hours (0.015%/hr): 2 × 0.015% = 0.0300%.
- Current BAC: 0.0772% - 0.0300% = 0.047%.
- Hours to 0.00% Zero BAC: 0.047% / 0.015%/hr = ~3.1 additional hours.
常見問題解答 (FAQ): BAC Calculator
Click any question below to expand quick answers, formulas, and expert tips.
What is the legal driving BAC limit in the United States and UK?
In the US and UK, the legal BAC driving limit is 0.08% (except Utah at 0.05% and Scotland at 0.05%). Commercial drivers have a stricter 0.04% limit.
Can coffee, cold showers, or exercise speed up alcohol metabolism?
No, the liver metabolizes alcohol at a fixed constant rate of approximately 0.015% BAC per hour; only time can lower blood alcohol content.