DASS-21 Scoring Calculator

About the DASS-21

The DASS-21 is a shortened version of the original 42-item scale developed by Lovibond and Lovibond (1995). It is designed to differentiate between symptoms of depression (e.g., low mood, hopelessness), anxiety (e.g., fear, physical tension), and stress (e.g., irritability, difficulty relaxing).

It is not a diagnostic tool but is useful for tracking symptom severity and treatment outcomes.

Each of the three sub-scales includes 7 items rated on a 4-point Likert scale (0–3), reflecting the past week.

Psychometric Properties

The DASS-21 has been widely validated across diverse populations and languages:

• Internal consistency: α = 0.87–0.94 across subscales
• Factor structure: Supports three distinct but related constructs
• Correlates strongly with other measures of depression and anxiety (e.g., BDI, STAI)
• Sensitive to change in clinical settings

Sources: Antony et al., 1998; Henry & Crawford, 2005

The Scale

The DASS-21 includes 21 items, rated 0 (Did not apply to me at all) to 3 (Applied to me very much or most of the time).

Each subscale score is summed and then multiplied by 2 to match the DASS-42 scoring convention.

Example items:

• Depression: “I felt that life was meaningless”
• Anxiety: “I felt I was close to panic”
• Stress: “I found it difficult to relax”

Score Range

Each subscale (Depression, Anxiety, Stress) is scored separately and multiplied by 2. Severity thresholds:

Depression (multiplied score):

• 0–9: Normal
• 10–13: Mild
• 14–20: Moderate
• 21–27: Severe
• 28+: Extremely severe

Anxiety (multiplied score):

• 0–7: Normal
• 8–9: Mild
• 10–14: Moderate
• 15–19: Severe
• 20+: Extremely severe

Stress (multiplied score):

• 0–14: Normal
• 15–18: Mild
• 19–25: Moderate
• 26–33: Severe
• 34+: Extremely severe

References

What is the DASS-21?

The DASS-21 (Depression Anxiety Stress Scales-21) is a shortened version of the original 42-item DASS developed by Lovibond and Lovibond at the University of New South Wales in 1995. It is a dimensional self-report scale that assesses the severity of three related but distinct negative emotional states: depression (dysphoria, hopelessness, anhedonia), anxiety (arousal, fear, panic), and stress (tension, irritability, difficulty relaxing).

Each of the three subscales contains 7 items rated on a 4-point Likert scale (0 = Did not apply to me at all; 3 = Applied to me very much or most of the time) over the past week. Subscale scores are calculated by summing the 7 items and multiplying by 2, producing an effective range of 0–42 per subscale that maps to the DASS-42 normative bands. Total scores across all three subscales are typically reported separately, not summed.

The DASS-21 is widely used in mental health research, clinical screening, and treatment outcome measurement. It is particularly valued for its ability to differentiate between depression and anxiety, a clinically important distinction since the two conditions frequently co-occur but require different treatment approaches.

Key Scoring Rule: Multiply by 2

Because the DASS-21 uses only half the items of the DASS-42, each subscale raw score (sum of 7 items) must be multiplied by 2 before applying the severity classification bands. Failing to apply this multiplier will make all scores appear lower than their true severity level.

Open Access

The DASS-21 is free to use for research and clinical purposes. It is available from the Psychology Foundation of Australia and the UNSW School of Psychology. No permissions are required for non-commercial clinical use.

Depression

Items 3, 5, 10, 13, 16, 17, 21

Measures dysphoria, hopelessness, devaluation of life, self-deprecation, lack of interest or involvement, anhedonia, and inertia.

Anxiety

Items 2, 4, 7, 9, 15, 19, 20

Measures autonomic arousal, skeletal muscle effects, situational anxiety, and subjective experience of anxious affect.

Stress

Items 1, 6, 8, 11, 12, 14, 18

Measures difficulty relaxing, nervous arousal, irritability/agitation, impatience, and over-reactivity to situations.

Item Response Scale (Same for All Items)

Rate each statement based on how much it applied to you over the past week. Subscale scores are calculated automatically (raw × 2 = scaled score).

Response scale: 0 = Never, 1 = Sometimes, 2 = Often, 3 = Almost always

Subscale scores are your raw score × 2 (multiplied to align with DASS-42 norms).

Frequently Asked Questions

How do you score the DASS-21?

Sum the scores for each subscale's 7 items, then multiply by 2. For example, if Depression item scores are 0+1+2+1+0+1+2 = 7, the scaled score is 7 × 2 = 14 (Moderate severity). Report Depression, Anxiety, and Stress subscale scores separately, there is no meaningful total score.

Why do you multiply DASS-21 scores by 2?

The DASS-21 contains half the items of the original DASS-42. Multiplying raw subscale scores by 2 produces equivalent scaled scores that align with the DASS-42 normative severity bands. Without this multiplier, all scores appear artificially low. Always apply the ×2 multiplier before interpreting results.

What is a normal DASS-21 score?

Normal ranges (scaled scores, after ×2 multiplier): Depression 0-9, Anxiety 0-7, Stress 0-14. Scores above these thresholds progress through Mild, Moderate, Severe, and Extremely Severe bands. Each subscale has its own normal range, anxiety's normal range is narrower than stress's.

What is the difference between DASS-21 Depression and DASS-21 Anxiety?

The Depression subscale captures dysphoria, hopelessness, anhedonia, and low self-worth, persistent low mood states. The Anxiety subscale captures autonomic arousal, fear, panic, and somatic anxiety, acute physiological activation. This distinction matters clinically because depressive and anxiety disorders respond to different treatments, and many patients have elevated scores on both.

What is the Stress subscale measuring?

The DASS-21 Stress subscale measures states of chronic tension, nervousness, irritability/agitation, over-reactivity, and difficulty relaxing. It is distinct from both depression and anxiety, stress represents persistent arousal without the acute fear component of anxiety. Elevated stress scores often suggest contributors like work pressure, life demands, or adjustment difficulties.

Does the DASS-21 assess suicidal ideation?

No. The DASS-21 does not include any items assessing suicidal ideation. If depression severity is elevated, always follow up with a direct suicidal ideation assessment, the C-SSRS (Columbia Suicide Severity Rating Scale) at /assessments/c-ssrs/ is the FDA-recommended criterion standard, or use PHQ-9 item 9 for a quick screen. The PHQ-9 is often preferred over DASS-21 in primary care settings specifically because it includes suicidal ideation screening.

What time frame does the DASS-21 cover?

The DASS-21 asks patients to rate how much each statement applied to them over the past week (7 days). This shorter window, compared to the PHQ-9's 2 weeks, makes the DASS-21 more sensitive to recent fluctuations and useful for tracking rapid symptom changes in treatment monitoring.

Is the DASS-21 validated for clinical populations?

Yes. The DASS-21 has been validated extensively in clinical and non-clinical populations including primary care, outpatient mental health, university students, and community samples across multiple countries. Psychometric properties consistently show strong internal consistency (Cronbach's α > 0.80 for all subscales) and concurrent validity with established measures like the BDI and BAI.

Are the DASS-21 severity cutoffs diagnostic thresholds?

No. The DASS-21 severity bands (Normal, Mild, Moderate, Severe, Extremely Severe) are normative cutoffs derived from non-clinical population data, not diagnostic ROC thresholds. They indicate where a score falls relative to the general population distribution, not whether a clinical disorder is present. The DASS-21 was designed as a dimensional severity measure, not a case-identification screener. For diagnostic screening purposes, condition-specific tools (PHQ-9 for depression, GAD-7 for anxiety) with established sensitivity/specificity are preferred.

Additional Context

The DASS-21 measures depression, anxiety, and stress across 21 items using a 0–3 scale. Each subscale score is doubled to align with DASS-42 norms, producing five severity levels per dimension, from Normal to Extremely Severe.

The DASS-21 (Depression Anxiety Stress Scales-21) is a shortened version of the original 42-item DASS developed by Lovibond and Lovibond at the University of New South Wales in 1995. It is a dimensional self-report scale that assesses the severity of three related but distinct negative emotional states: depression (dysphoria, hopelessness, anhedonia), anxiety (arousal, fear, panic), and stress (tension, irritability, difficulty relaxing).

Each of the three subscales contains 7 items rated on a 4-point Likert scale (0 = Did not apply to me at all; 3 = Applied to me very much or most of the time) over the past week. Subscale scores are calculated by summing the 7 items and multiplying by 2, producing an effective range of 0–42 per subscale that maps to the DASS-42 normative bands. Total scores across all three subscales are typically reported separately, not summed.

The DASS-21 is widely used in mental health research, clinical screening, and treatment outcome measurement. It is particularly valued for its ability to differentiate between depression and anxiety, a clinically important distinction since the two conditions frequently co-occur but require different treatment approaches.

Because the DASS-21 uses only half the items of the DASS-42, each subscale raw score (sum of 7 items) must be multiplied by 2 before applying the severity classification bands. Failing to apply this multiplier will make all scores appear lower than their true severity level.

The DASS-21 is free to use for research and clinical purposes. It is available from the Psychology Foundation of Australia and the UNSW School of Psychology. No permissions are required for non-commercial clinical use.

Three DASS-21 Subscales

Each subscale has 7 items rated 0–3 over the past week. Raw subscale score × 2 = final scaled score used for severity classification.

Items 3, 5, 10, 13, 16, 17, 21

Measures dysphoria, hopelessness, devaluation of life, self-deprecation, lack of interest or involvement, anhedonia, and inertia.

Items 2, 4, 7, 9, 15, 19, 20

Measures autonomic arousal, skeletal muscle effects, situational anxiety, and subjective experience of anxious affect.

Items 1, 6, 8, 11, 12, 14, 18

Measures difficulty relaxing, nervous arousal, irritability/agitation, impatience, and over-reactivity to situations.

Rate each statement based on how much it applied to you over the past week. Subscale scores are calculated automatically (raw × 2 = scaled score).

Response scale: 0 = Never, 1 = Sometimes, 2 = Often, 3 = Almost always

Subscale scores are your raw score × 2 (multiplied to align with DASS-42 norms).

Educational and screening purposes only. Not a substitute for professional clinical evaluation.

DASS-21 Scoring Tables

Apply severity bands to each subscale independently. Scores are subscale raw score × 2.

Depression Subscale

Anxiety Subscale

Stress Subscale

Subscales Are Independent, Don't Sum Them

Report Depression, Anxiety, and Stress subscale scores separately. There is no meaningful total DASS-21 score. A patient may score in the Severe range on Anxiety while scoring Normal on Depression, this distinction is clinically important and drives different treatment decisions.

DASS-21 vs PHQ-9 + GAD-7

Both approaches screen for depression and anxiety. The right choice depends on your clinical workflow and what you need to measure.

Clinical Guidance: Use DASS-21 when you need to capture and differentiate stress alongside depression and anxiety, particularly in research, psychological assessment, or contexts where the stress subscale adds treatment-planning value. Use PHQ-9 + GAD-7 for primary care SBIRT workflows, measurement-based care in depression treatment, or when suicidal ideation needs explicit assessment (PHQ-9 item 9). HiBoop supports both approaches with automated scoring and longitudinal tracking.

Documenting DASS-21 scores in clinical notes?

DASS-21 scores belong in the Objective section of your note. See our SOAP notes guide and Progress Notes guide for templates and examples.