AUDIT-C Calculator
Estimate your AUDIT-C Calculator with our free addiction medicine calculator. See reference ranges, risk factors, and next-step guidance.
Medical disclaimer: This calculator is provided for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment. Results are general estimates and may not reflect your individual circumstances. Always consult a qualified healthcare professional before making decisions about your health.
Formula
AUDIT-C Score = Q1 + Q2 + Q3, each scored 0-4 (range 0-12)
AUDIT-C is the three-question consumption subscale of the WHO AUDIT: how often you drink, how much you drink on a typical drinking day, and how often you have six or more drinks at once. Each answer scores 0 to 4, giving a total of 0 to 12. The screen is positive at 4 or more for men and 3 or more for women; higher scores, especially 6 or above, raise the probability of an alcohol use disorder. A positive AUDIT-C is a prompt to ask the remaining seven AUDIT questions, not a diagnosis.
Worked Examples
Example 1: Low-Risk Drinker (Male)
Problem:A man reports drinking 2-4 times a month (Q1 = 2), having 1 or 2 drinks on a typical drinking day (Q2 = 0), and never having six or more drinks on one occasion (Q3 = 0).
Solution:Q1 frequency = 2 Q2 typical quantity = 0 Q3 heavy episodic drinking = 0 AUDIT-C total = 2 + 0 + 0 = 2 out of 12 Threshold for men = 4, so 2 is below it
Result:AUDIT-C: 2/12 — Negative screen for a man. No further alcohol questions needed at this visit.
Example 2: Positive Screen in a Woman
Problem:A woman reports drinking 2-3 times a week (Q1 = 3), typically 3 or 4 drinks (Q2 = 1), and six or more drinks on one occasion less than monthly (Q3 = 1).
Solution:Q1 frequency = 3 Q2 typical quantity = 1 Q3 heavy episodic drinking = 1 AUDIT-C total = 3 + 1 + 1 = 5 out of 12 Threshold for women = 3, so 5 is a positive screen Weekly intake implied: roughly 2.5 drinking days x 3.5 drinks = about 9 US standard drinks a week
Result:AUDIT-C: 5/12 — Positive screen. Ask the remaining seven AUDIT questions and offer a brief intervention.
Frequently Asked Questions
What is the AUDIT-C screening tool?
The AUDIT-C (Alcohol Use Disorders Identification Test - Consumption) is a brief validated screening instrument derived from the full 10-question AUDIT tool developed by the World Health Organization. The AUDIT-C uses the first three questions of the full AUDIT, all of them about consumption, to identify hazardous drinking and possible alcohol use disorders. This page scores those three questions only; the full ten-item AUDIT is on a separate page. The tool was developed through a multinational WHO collaborative study and has been extensively validated across diverse populations, healthcare settings, and cultural contexts. It is widely used in primary care, emergency departments, and mental health settings as a quick and reliable alcohol screening method.
How is the AUDIT-C score interpreted?
The AUDIT-C total runs from 0 to 12. The screen is conventionally positive at 4 or more for men and 3 or more for women, thresholds chosen because women reach the same blood alcohol concentration on less alcohol. A positive result means the reported drinking pattern is consistent with hazardous use, not that a disorder is present. Higher totals carry a steeper probability: scores of 6 or 7 are strongly associated with an alcohol use disorder, and 8 or above more so again. Because AUDIT-C measures only how much and how often someone drinks, a positive result is normally followed by the remaining seven AUDIT questions, which cover impaired control, morning drinking, blackouts, injury and the concern of others.
What do the three AUDIT-C questions actually measure?
The three items each capture a different facet of consumption. Question one is frequency: how many days someone drinks at all, which separates an occasional drinker from a daily one. Question two is intensity: how many standard drinks on a typical drinking day, where under-counting is most common because home pours and large wine glasses hold more than one standard drink. Question three is heavy episodic drinking: how often six or more drinks are taken on one occasion, the pattern most strongly linked to injury, and it can be positive even when the first two answers look modest. A total driven mainly by question three points at a different problem from one driven by questions one and two. None of the three asks about impaired control, guilt, blackouts or whether anyone else has raised concern; those live in the seven questions AUDIT-C leaves out.
How reliable is AUDIT-C compared with the full AUDIT?
AUDIT-C was validated against the full AUDIT and against clinical interview in large primary care and veteran populations, and at the standard cut-offs it performs close to the ten-item version for detecting heavy drinking while taking under a minute to administer. What it gives up is the dependence and harm content: someone who has cut back to a modest intake but still drinks in the morning, or who has been injured while drinking, can screen negative on AUDIT-C and positive on the full AUDIT. That is why guidelines treat AUDIT-C as a first-stage filter rather than a replacement. Optimal cut-offs also shift with the population being screened, and some services use a higher threshold where a positive screen triggers a costly pathway.
What is a standard drink and why does it matter for AUDIT scoring?
A standard drink is a fixed amount of pure alcohol used to quantify consumption consistently. In the United States, one standard drink contains 14 grams (0.6 fluid ounces) of pure alcohol, equivalent to 12 ounces of regular beer (5% alcohol), 5 ounces of wine (12% alcohol), or 1.5 ounces of distilled spirits (40% alcohol). Other countries define standard drinks differently — the UK uses 8 grams, Australia uses 10 grams, and Japan uses about 19.75 grams. When completing the AUDIT, it is essential to count drinks in standard units rather than by glass or container, because serving sizes vary widely. Many people underestimate their intake because their glasses hold more than one standard drink.
Why are the cut-offs different for men and women?
The same number of drinks produces a higher blood alcohol concentration in women, mainly because of a lower average proportion of body water and differences in first-pass metabolism, so the level of consumption that carries a given risk is reached at a lower intake. The commonly used thresholds reflect that: 4 or more for men, 3 or more for women. The sex-specific cut-off is a calibration of the same scale, not a different questionnaire, and clinicians may still apply judgement around the boundary, particularly for older adults, for whom a lower threshold is sometimes recommended for the same physiological reason.
What is the difference between screening and diagnosis here?
A screening instrument sorts people into those who probably need a closer look and those who probably do not. It is tuned to miss few genuine cases, which necessarily means some people screen positive without having a disorder. A diagnosis of alcohol use disorder is made by a clinician against formal criteria, through interview and history, considering impaired control, social impairment, risky use and physiological features. A score from this page is a prompt for that conversation, never a substitute for it.
What does a brief intervention actually involve?
For a positive AUDIT-C the recommended response is usually a short structured conversation, often ten to fifteen minutes, rather than referral to treatment. It typically covers feedback on how the reported drinking compares with guidelines, information on the specific risks, and a collaborative discussion of whether and how the person wants to cut down, ending with a concrete plan. The approach is motivational rather than confrontational, and repeated evidence reviews have found it effective at the hazardous end of the spectrum.
What counts as a standard drink when answering question two?
In the United States a standard drink is 14 grams of pure alcohol: 12 fl oz of 5% beer, 5 fl oz of 12% wine, or 1.5 fl oz of 40% spirits. The AUDIT-C answer bands are written in those units, so a single 16 oz pint of a 7% craft beer is closer to two standard drinks than one, and a generous home pour of wine can be two. Counting containers rather than standard drinks is the most common source of an artificially low AUDIT-C score. If drink sizes in your country differ, convert to the US standard before answering rather than mixing units.
What happens to accuracy when the cut-off is lowered?
Lowering the threshold moves the trade-off between sensitivity and specificity. A lower cut-off catches more people who genuinely have a problem, at the price of flagging more who do not, which costs clinician time and can cause needless worry. Raising it does the reverse and lets more real cases through. Because average consumption and body water differ, some guidance suggests a lower threshold for women and for older adults, which is a deliberate choice about which error is more acceptable in that group.
References
Reviewed for accuracy by Rahul Singh, Health & Wellness Specialist · Editorial policy
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