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Blood Alcohol Concentration (BAC) estimates how much alcohol is in the bloodstream, calculated using the Widmark formula. BAC is influenced by units consumed, body weight, time elapsed, and biological sex (different body water percentages).
Vaiheittainen opas
- 1Widmark formula: BAC% = (Alcohol grams) / (Body weight kg × 1000 × r) − 0.015 × hours
- 2r = 0.68 (males), 0.55 (females) — distribution factor
- 31 UK unit = 10ml pure alcohol = ~8g
- 4Alcohol eliminated at ~0.015% per hour (linear, not exponential)
Ratkaistut esimerkit
Syöte
4 pints (4% lager) · 70kg male · 2 hours drinking
Tulos
BAC ≈ 0.087% (over UK legal limit of 0.08%)
Drive limit 0.05% in Scotland, 0.08% in England/Wales
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