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Dudit (Drug Use Disorders Identification Test) Calculator

Calculate your DUDIT score instantly to screen for drug-related problems and dependence using the validated 11-item Karolinska Institutet screening tool.

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Inputs

1. How often do you use drugs other than alcohol?

2. Do you use more than one type of drug on the same occasion?

3. How many times do you take drugs on a typical day when you use drugs?

4. How often are you influenced heavily by drugs?

5. Over the past year, have you felt that your longing for drugs was so strong that you could not resist it?

6. Has it happened, over the past year, that you have not been able to stop taking drugs once you started?

7. How often over the past year have you taken drugs and then neglected to do something you should have done?

8. How often over the past year have you needed to take a drug the morning after heavy drug use the day before?

9. How often over the past year have you had guilt feelings or a bad conscience because you used drugs?

10. Have you or anyone else been hurt (mentally or physically) because you used drugs?

11. Has a relative, friend, doctor, or anyone else been worried about your drug use or suggested you cut down?

DUDIT Total Score

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Get a plain-English breakdown of your result with practical next steps.

DUDIT Total Score—points

The formula

How the
result is
computed.

What Is the DUDIT Calculator?

The Drug Use Disorders Identification Test (DUDIT) is an 11-item validated screening instrument developed at the Karolinska Institutet by Berman, Bergman, Palmstierna, and Schlyter. Designed as a parallel tool to the widely used AUDIT (Alcohol Use Disorders Identification Test), the DUDIT identifies individuals with drug-related problems and probable drug dependence. Healthcare providers, criminal justice professionals, and researchers employ it in clinical intake assessments, detoxification settings, and population-based surveys.

Scoring Formula

The total DUDIT score is calculated by summing all 11 item scores:

DUDIT = (q1 + q2 + q3 + q4 + q5 + q6 + q7 + q8 + q9) + (q10 + q11)

Questions 1 through 9 use a five-point response scale scored 0, 1, 2, 3, or 4, yielding a maximum sub-score of 36. Questions 10 and 11 use a three-point scale scored 0, 2, or 4, yielding a maximum sub-score of 8. The overall maximum possible score is 44.

Score Interpretation

Score 0: No drug-related problems indicated.
Score 1–5 (men): Below the clinical threshold; possible low-level drug use meriting awareness.
Score 6 or higher (men) / 2 or higher (women): Likely drug-related problems; clinical evaluation is recommended.
Score 25–44: Probable drug dependence; referral for comprehensive assessment is strongly advised.

The gender-differentiated cutoff scores — 6 for men and 2 for women — reflect evidence that women experience harmful consequences at lower consumption levels. These thresholds were validated by Berman AH et al. (2005) in European Addiction Research across criminal justice, detoxification, and general population cohorts.

Understanding Each Question Domain

Consumption Questions (q1–q4)

The first four items assess frequency of non-alcohol drug use, polydrug behavior, quantity on a typical use day, and frequency of heavy intoxication. High scores in this domain signal problematic consumption patterns independent of downstream harms. For example, a person who uses drugs daily (q1=4) and combines multiple substances on the same occasion (q2=4) already accrues 8 points before any harm or dependence items are considered.

Dependence Indicators (q5–q8)

Items 5 through 8 probe craving intensity, loss of control, role-obligation neglect, and morning use as a proxy for withdrawal relief. A score of 4 on question 8 alone — needing drugs the morning after heavy use on most or all such occasions — is a strong clinical indicator of physical dependence and should prompt immediate professional referral.

Harm and External Concern (q9–q11)

The final three questions capture guilt and conscience (q9), physical or psychological harm to self or others (q10), and external concern from relatives, friends, or medical professionals (q11). Questions 10 and 11 are scored 0, 2, or 4 — carrying double weight per response step — reflecting their elevated clinical significance as harm indicators. This weighting aligns with the instrument design described in the DUDIT Manual published by Karolinska Institutet.

Worked Example

Consider a patient who reports monthly cannabis and occasional stimulant use: q1=2, q2=2, q3=1, q4=1, q5=1, q6=1, q7=1, q8=0, q9=2, q10=2, q11=0. The total is 2+2+1+1+1+1+1+0+2+2+0 = 13. This falls in the 6–24 range, indicating likely drug-related problems and the need for a structured clinical evaluation, even though no clear dependence markers (morning use, persistent craving) are present.

Clinical Validity and Applications

The DUDIT demonstrates strong psychometric properties. Berman et al. reported a Cronbach's alpha of 0.80 in a Swedish population sample, confirming good internal consistency. The instrument performs reliably across genders, age groups, and substance types including cannabis, opioids, stimulants, and sedatives. It is routinely used in emergency departments, addiction treatment intake, occupational health screening, and epidemiological research. Its brevity — typically 1 to 5 minutes to complete — makes it ideal for high-volume clinical environments.

Important Limitations

The DUDIT is a screening tool, not a diagnostic instrument. A high score does not constitute a formal diagnosis of a substance use disorder under DSM-5 or ICD-11 criteria. Results require interpretation by a qualified healthcare professional within the context of a full clinical assessment. The DUDIT screens only for non-alcohol substances; for alcohol-related disorders, a separate AUDIT screening is required.

Reference

Frequently asked questions

What is the maximum possible score on the DUDIT Calculator?

The maximum possible DUDIT score is 44 points. Questions 1 through 9 each contribute up to 4 points, totaling a maximum of 36 points for that block. Questions 10 and 11 each score 0, 2, or 4, adding a maximum of 8 points. A score of 44 represents the most severe pattern of drug use, dependence indicators, and drug-related harm across all domains the instrument measures.

What DUDIT score indicates probable drug dependence?

A DUDIT score of 25 or higher indicates probable drug dependence for both men and women, according to the original Karolinska Institutet manual authored by Berman, Bergman, Palmstierna, and Schlyter. Scores between 6 and 24 for men, or between 2 and 24 for women, suggest drug-related problems without confirmed dependence. Anyone scoring 25 or above should receive an immediate referral for comprehensive clinical assessment and formal diagnostic evaluation.

Why is the DUDIT cutoff score different for men and women?

The recommended cutoff for identifying drug-related problems is 6 or higher for men and 2 or higher for women. This gender difference exists because research consistently shows that women experience adverse physical, psychological, and social consequences from drug use at lower overall consumption levels than men. Both thresholds were validated in the landmark 2005 study by Berman AH et al. published in European Addiction Research, which tested the DUDIT across criminal justice, detoxification, and general Swedish population samples.

Which substances does the DUDIT screen for?

The DUDIT screens for all non-alcohol psychoactive substances, including cannabis, opioids such as heroin and prescription painkillers, stimulants such as cocaine and amphetamines, sedatives and tranquilizers, hallucinogens, inhalants, and anabolic steroids. It does not assess alcohol consumption — that domain requires the AUDIT (Alcohol Use Disorders Identification Test). Many addiction clinics and hospitals administer both tools simultaneously to build a complete substance use profile for each patient.

How long does it take to complete the DUDIT questionnaire?

The DUDIT consists of only 11 questions and typically takes between 1 and 5 minutes to complete in self-report format. Each question presents clearly worded response options — five choices for items 1 through 9 and three choices for items 10 and 11. This brevity makes the DUDIT highly practical for use in busy clinical environments such as emergency departments, primary care offices, pre-admission screenings in treatment centers, and occupational health assessments.

Can someone use the DUDIT as a personal self-assessment tool?

Yes. The DUDIT was originally designed for self-administration and has been validated extensively in self-report settings. Individuals can complete it honestly to develop greater awareness of their drug use patterns and potential risks. However, the results must always be reviewed with a qualified healthcare or addiction professional. A score above the gender-specific cutoff warrants structured clinical follow-up, and a low score does not definitively rule out a substance use disorder if other clinical signs or symptoms are present.