EEasynivo
Free health planning tool

BAC Estimator

Estimate blood alcohol concentration from body weight, drinks and elapsed time—with a strict driving warning.

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Result

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Enter values and select Calculate.

Never use this estimate to decide whether to drive or perform risky activities. BAC may still be rising, only time lowers alcohol levels, and the only safe driving BAC is 0.

Method and assumptions

Uses a simplified Widmark estimate, 14 g per default U.S. standard drink and 0.015 percentage points per hour.

Important limitations

Never use this estimate to decide whether to drive or perform risky activities. BAC may still be rising, only time lowers alcohol levels, and the only safe driving BAC is 0.

Official references

Transparency

Sources & methodology

Calculation method
Uses a simplified Widmark estimate, 14 g per default U.S. standard drink and 0.015 percentage points per hour.
Evidence basis
Published health guidance combined with a simplified planning estimate.
Applies to
No statutory reference year. Results use the values and assumptions entered now.
Last reviewed
Limitations
Never use this estimate to decide whether to drive or perform risky activities. BAC may still be rising, only time lowers alcohol levels, and the only safe driving BAC is 0.

Sources

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Content basis and verification

· Calculations run in your browser. Check the formula and assumptions on this page, and confirm important financial, tax, medical or legal decisions against current official guidance.