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No alcohol estimate

Estimate based only on the drinks and timing you entered. It is not a measurement of your actual BAC.

Estimated BAC

0.0 mg/100 ml

Add an alcoholic drink to populate the alcohol estimate.

Do not use this estimate to decide whether you are safe or legally allowed to drive, work, operate equipment, or perform safety-sensitive activities.

Modelled trend if no more drinks are added

Add drinks to see your modelled BAC trend.

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Drink log

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Pro-Tip

Eating a meal before drinking may slow absorption and lower peak BAC. It does not change total elimination time.

What you can do next

Explore Your Full Picture

Recovery EstimateSee how the estimate changes over time.Recovery EstimateHydrationSuggested fluid context based on this session.HydrationHangover RiskEstimated next-day risk from this session.Hangover RiskAlcohol ImpactUnderstand the short-term body load.Alcohol Impact

* Legal limits vary by driver type, vehicle and state. This tool cannot determine legal driving status.

Last updated: April 25, 2026

How long after drinking can I drive?

This is one of the most common questions after drinking, but an online calculator cannot say whether driving is safe or legal. Many people confuse "I feel better" with lower impairment risk. In reality, the body needs time to metabolise alcohol, and that process cannot be meaningfully speeded up by coffee, a shower or a walk.

On this page you can understand the modeled BAC curve, the 80 mg/100 ml reference threshold, and near-zero timing for education only.

Safety first

Do not drive after drinking. Even when you feel sober, alcohol can impair reaction time, attention, and judgement, and any estimate on this page is a population-level model — not a fitness-to-drive indicator. If you must know whether you are below a legal limit, use a calibrated, type-approved breathalyser, request a blood test, or simply wait. When in doubt, do not drive.

Educational note

There is no shortcut to alcohol metabolism. The key factors are the amount of alcohol, the time since the last drink and your body parameters.

What the answer depends on

The most important factor is the total amount of alcohol consumed and how the drinking was spread over time. Body weight, sex, food and the time of the last drink also matter. Two people with a similar evening can have different curves, so there is no sensible universal answer such as "after X hours everyone is clear."

The page separates legal-limit context from a near-zero estimate. Neither can decide whether driving is safe or legal, because impairment, enforcement and individual circumstances are broader than a modeled number.

How to interpret the result

80 mg/100 ml is the key legal threshold in England, Wales and NI, but a modeled value below that threshold is not an assessment of your legal situation or fitness to drive. A near-zero estimate is also only a model reference.

That is why the page shows the curve as educational context rather than a recommendation about what to do next.

Common mistakes

Frequently asked questions

When might the model cross 80 mg/100 ml?

It depends on the dose, drinking time and your parameters. The calculator shows educational context only, not a driving decision.

When will I be at zero?

Full return to zero typically takes longer than simply falling below the legal limit.

Does coffee or sleep speed up metabolism?

No. They do not speed up alcohol metabolism in any meaningful way.

What affects metabolism time the most?

The amount of pure alcohol, time since the last drink, body weight and other parameters.

Can I speed up the elimination of alcohol?

Not in a way that is reliably predictable.

Does exercise help?

It does not remove alcohol from the body at a meaningful rate.

Is the result the same for men and women?

Not always. Physiological differences can affect the result.

Does the calculator replace a breathalyser?

No. The calculator is an educational model and does not assess your real-world situation.

Estimate based on the Widmark equation with a dynamic absorption curve (Mitchell et al., 2014) and elimination rate per Jones (2010). Methodology .

See also

Can I drive after drinking? Morning after: am I still over the limit? UK drink drive limit 2026 Can I drive after 2 pints?

If you want to check the exact legal limit in the UK, go to the "UK drink drive limit" page.

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