S N A P Score
No significant ADHD symptoms
Did our AI summary help? Let us know.
Evidence-based calculations Used in clinical settings worldwide Regular monitoring recommended
Ready to run the numbers?
Why: This calculation helps assess important health parameters for clinical and personal wellness tracking.
How: Enter your values above and the calculator will apply validated formulas to compute your results.
Run the calculator when you are ready.
👶 Typical Child
No significant ADHD symptoms
Click to load
📚 Mild Inattention
Primarily inattentive symptoms
Click to load
🎯 ADHD Inattentive Type
Meets criteria for ADHD predominantly inattentive
Click to load
⚡ ADHD Combined Type
Both inattentive and hyperactive symptoms
Click to load
😤 ODD Features
Prominent oppositional defiant symptoms
Click to load
Sample Profiles
👶 Typical Child
No significant ADHD symptoms
📚 Mild Inattention
Primarily inattentive symptoms
🎯 ADHD Inattentive Type
Meets criteria for ADHD predominantly inattentive
⚡ ADHD Combined Type
Both inattentive and hyperactive symptoms
😤 ODD Features
Prominent oppositional defiant symptoms
Child Information
📚 Inattention Symptoms
Rate each behavior based on how often it occurs.
⚡ Hyperactivity/Impulsivity Symptoms
😤 Oppositional Defiant Symptoms
For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
🏥 Health Facts
— WHO
— CDC
What is the SNAP-IV Rating Scale?
The SNAP-IV (Swanson, Nolan, and Pelham Rating Scale, Version IV) is a widely used questionnaire designed to assess symptoms of Attention-Deficit/Hyperactivity Disorder (ADHD) and Oppositional Defiant Disorder (ODD) in children and adolescents ages 6-18. The items are based directly on the DSM diagnostic criteria, making it a valuable screening tool for clinical evaluation.
Inattention
9 items assessing difficulty sustaining attention, organizing tasks, and following through on instructions.
Hyperactivity/Impulsivity
9 items measuring restlessness, excessive talking, difficulty waiting, and impulsive behavior.
Oppositional Defiant
8 items assessing defiant behavior, arguing with adults, and irritability.
How Does SNAP-IV Scoring Work?
Each item is rated on a 0-3 scale based on how frequently the behavior occurs. Subscale average scores are compared against normative cutoffs that differ for teacher and parent raters.
Response Scale
Not at all
Just a little
Quite a bit
Very much
Teacher Cutoffs
- Inattention: 2.56
- Hyperactivity: 1.78
- ODD: 1.38
Parent Cutoffs
- Inattention: 1.78
- Hyperactivity: 1.44
- ODD: 1.24
When to Use This Assessment
Initial Screening
When ADHD is suspected based on behavioral concerns at home or school.
Treatment Monitoring
To track symptom changes during medication trials or behavioral interventions.
Multi-Informant Assessment
Best used with ratings from both parents and teachers for comprehensive evaluation.
Important Notice
The SNAP-IV is a screening tool, not a diagnostic instrument. A diagnosis of ADHD requires comprehensive evaluation by a qualified healthcare professional, including clinical interview, developmental history, and assessment of impairment across settings. This calculator should not replace professional evaluation.
Related Calculators
EPDS Calculator - Edinburgh Postnatal Depression Scale
Edinburgh Postnatal Depression Scale (EPDS) - validated 10-item screening tool for perinatal depression. Screens for depression and anxiety during pregnancy...
HealthGAD-7 Anxiety Calculator
Generalized Anxiety Disorder 7-item (GAD-7) scale - validated screening and severity measure for anxiety disorders. 89% sensitivity and 82% specificity at...
HealthHappiness Calculator - Subjective Well-Being Assessment
Comprehensive happiness and well-being assessment based on validated psychological frameworks including SWLS (Satisfaction With Life Scale) and PERMA model....
HealthPHQ-2 Depression Screening Calculator
Quick 2-question PHQ-2 depression screening tool. Validated first-step assessment for identifying individuals who may need comprehensive depression...
HealthA-a Gradient Calculator
Calculate the Alveolar-arterial (A-a) oxygen gradient to assess oxygenation efficiency. Helps differentiate between pulmonary and extrapulmonary causes of...
HealthAdvanced ABI Calculator (Ankle-Brachial Index)
Comprehensive Ankle-Brachial Index calculator with multiple measurement methods, advanced PAD risk assessment, exercise testing capability, cardiovascular...
Health