DUDIT Calculator

Answer all 11 questions of the Drug Use Disorders Identification Test (DUDIT) to get your total score (0-44) and see it checked against the standard screening cutoffs.

Quick Facts

Instrument
11-item DUDIT, score range 0-44
Developed by Berman, Bergman, Palmstierna & Schlyter (2003/2005), modeled on the alcohol-focused AUDIT.
Item scoring
Q1-Q9: 0-4 each; Q10-Q11: 0, 2, or 4
Total = sum of all 11 item scores.
Problem cutoff
≥6 for men, ≥2 for women
Flags a likely drug-related problem warranting further assessment.
Dependence flag
≥25 (either sex)
Strongly associated with probable drug dependence in validation studies.

Your Results

Calculated
Total DUDIT Score
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Sum of all 11 items, out of 44
Screening Category
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Based on your total score
Cutoff Applied
-
Problem threshold used for your sex
Suggested Next Step
-
Educational guidance, not a diagnosis

Ready

Answer all 11 questions above, then press Calculate.

About the DUDIT (Drug Use Disorders Identification Test)

The DUDIT is an 11-item self-report screening questionnaire developed by Anne H. Berman, Hanna Bergman, Tom Palmstierna, and Frans Schlyter, first published in 2003 and validated further in 2005. It was built as a companion to the widely used AUDIT (Alcohol Use Disorders Identification Test), following the same structure but focused on drugs other than alcohol. The tool asks about frequency of use, loss of control, harm to yourself or others, and concern expressed by people around you, then converts your answers into a single total score you can compare to published cutoffs.

How the DUDIT is scored

Questions 1 through 9 use a five-point frequency scale scored 0-4 (for example, "Never" = 0 up to "Daily or almost every day" = 4, or a use-count scale for question 3). Questions 10 and 11 use a three-point scale scored 0, 2, or 4, reflecting whether harm or concern from others happened, and if so, whether it happened within the past year. Adding the scores for all 11 items gives a total that can range from 0 (no reported drug-related items) to 44 (maximum frequency and harm on every item).

Understanding your total score

Validation studies use a sex-specific cutoff for flagging a likely drug-related problem: a total of 6 or more for men, or 2 or more for women (women in the reference samples reported fewer heavy-use items on average, so a lower cutoff catches problems earlier). Separately, a total of 25 or higher is strongly associated with probable drug dependence regardless of sex. A low score does not rule out a problem — it means your answers did not match the pattern the DUDIT was designed to catch, and any drug use you are concerned about is still worth discussing with a professional.

What this calculator is not

This tool reproduces the standard DUDIT scoring rules for educational and self-reflection purposes; it is not a diagnostic test and does not replace a clinical interview. The DUDIT is typically used as a first-pass screen in primary care, criminal justice, or substance-use treatment settings, with a positive screen followed by a structured clinical assessment. If your result — or your own concerns about drug use — feels significant, talk to a physician, licensed counselor, or addiction specialist.

Frequently Asked Questions

What is the DUDIT and what does it measure?
The Drug Use Disorders Identification Test (DUDIT) is an 11-item self-report screening questionnaire developed by Berman, Bergman, Palmstierna, and Schlyter (2003, revised 2005) to identify drug-related problems and probable drug dependence. It mirrors the structure of the alcohol-focused AUDIT test but covers drug use other than alcohol.
How is the DUDIT scored?
Questions 1-9 are each scored 0-4 on a frequency scale, and questions 10-11 are scored 0, 2, or 4 based on whether harm or others' concern occurred and when. Adding all 11 item scores gives a total ranging from 0 to 44.
What DUDIT score indicates a possible drug problem?
In the validation studies, a total score of 6 or more for men and 2 or more for women is used as the cutoff suggesting a likely drug-related problem worth further assessment. Scores of 25 or higher are strongly associated with probable drug dependence.
Is the DUDIT a medical diagnosis?
No. The DUDIT is a screening tool, not a diagnostic instrument. A high score flags the need for a fuller clinical evaluation — it should be discussed with a physician, addiction counselor, or other qualified healthcare professional rather than treated as a diagnosis on its own.

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