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BAC a zotavenie po alkohole

🍺Alcohol & BAC Recovery Calculator

⚠️ Estimated BAC only. Never drink and drive.

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Weight (kg)

Hours drinking

What is BAC & Alcohol Recovery?

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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).

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

How to BAC & Alcohol Recovery

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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)

Worked Examples

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Example 1

Given:4 pints (4% lager) · 70kg male · 2 hours drinking

Výsledok:BAC ≈ 0.087% (over UK legal limit of 0.08%)

Drive limit 0.05% in Scotland, 0.08% in England/Wales

BAC effects

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BAC %	Typical effects
0.02–0.05	Relaxation, mild impairment
0.05–0.08	Judgement impaired, coordination reduced
0.08–0.15	Legally drunk in most countries, clear impairment
0.15–0.25	Significant impairment, nausea possible
> 0.25	Risk of unconsciousness, death risk > 0.40%

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Pro Tip

BAC estimates are highly variable between individuals. Never use BAC calculators to make decisions about driving — use a calibrated breathalyser or simply do not drive after drinking.

References

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Deep Dive

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Formula-verified for precision

Reviewed October 2026

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