What is this ADHD test?

It’s a free 20-question self-screen for adults who suspect ADHD. Items are informed by the WHO/Harvard Adult ADHD Self-Report Scale (ASRS-v1.1) and the DSM-5 adult ADHD criteria, written in plain identity-first English. The 20 items split across four dimensions — inattention, hyperactivity-impulsivity, executive function, and emotional regulation — and use a 4-point frequency scale (Almost never / Sometimes / Often / Almost always). Takes about 5 minutes. You can skip any question.

Is this ADHD test a diagnosis?

No. It’s a structured self-screen — a starting point. A formal adult ADHD assessment requires a qualified clinician (psychiatrist, psychologist, or specialist-trained GP/NP) who works with adult ADHD specifically. Many adults still get assessed by clinicians whose ADHD experience is mostly with children, which is one reason adult ADHD — particularly the inattentive presentation, and particularly in women — is so commonly missed. A high score here is information worth taking to someone who can actually assess it.

How accurate is an online ADHD test?

Self-screens like ASRS-v1.1 (which this test draws from) have decent sensitivity for adult ADHD in research samples, but they’re screens, not diagnostic instruments. They identify patterns that warrant follow-up. They can’t replace structured clinical assessment with developmental history, rule-outs (thyroid, sleep, trauma, depression, anxiety), and collateral information. Use the result as one input, not the verdict.

Why four dimensions instead of just the two DSM symptom domains?

DSM-5 formally recognises two: inattention and hyperactivity-impulsivity. We add executive function and emotional regulation because, in adult ADHD, those are usually the dimensions that actually wreck people’s days. Time-blindness, task initiation, working-memory failure, rejection sensitivity, boredom intolerance, and emotional dysregulation aren’t officially diagnostic but are some of the most consistent adult-ADHD reports — and they often persist after the more obvious hyperactivity has faded with age. Splitting them out makes the breakdown more useful when you take it to a clinician.

I scored high. What do I do?

Three steps, no rush. (1) Read the adult ADHD recognition guide so you understand what the score actually points to and the common late-diagnosis pattern. (2) If you want a formal assessment, book one with an adult-ADHD-experienced clinician — your GP can refer (NHS in the UK; primary care in the US), or you can go private. (3) Don’t self-medicate. Stimulants and most ADHD medications are controlled substances for good reason — the right diagnosis and the right titration matter. The result page links to the next-step guides directly.

I scored low but I still suspect ADHD. What now?

Low totals with one elevated dimension (especially inattention or executive function alone) are common in adults who mask, especially women and late-diagnosed adults. Look at the dimension breakdown rather than just the total. If executive function and emotional regulation are elevated but the classic hyperactivity items are low, that’s the inattentive presentation — easy to miss because it doesn’t fit the stereotype. Consider the AuDHD test if autistic traits also fit, and read the inattentive ADHD guide.

Does adult ADHD really exist, or do you just grow out of it?

Adult ADHD is real and well-documented. About 60% of ADHD children continue to meet adult criteria; many of the rest still have functional impairment even when full diagnostic criteria aren’t met. The hyperactivity component often fades with age (the outwardly restless kid becomes the inwardly restless adult), which is one reason adult ADHD — particularly inattentive presentation — is so commonly missed. ’Growing out of it’ usually means ’the most visible symptoms got quieter while the less visible ones did all the damage’.

Do you store my answers?

No. Your answers live in your browser tab and disappear when you close it. We don’t store responses, attach them to your email, or share them with anyone. If you’re signed in and choose to keep a result on your account, only the band, score, and dimension breakdown are saved — never the individual answers. Full export and one-click deletion live on your account page.

Free ADHD Test — 20-Question Adult Self-Screen

ADHD test for adults

This is a free 20-question ADHD self-screen for adults. It takes about 5 minutes, and you can skip any question.
The items follow a widely used adult scale. They also track the official rule book for diagnosis. The page below names both sources.
It covers four sides of adult ADHD. Focus, restlessness and impulse control are two of them. Planning skills and emotion control are the rest.
You get a score from 0 to 60. It lands in one of four bands. The bands run from few to strong indicators.
This is a screen, not a diagnosis. No online test can diagnose ADHD. A high score is a signal to bring to a clinician.
Your answers are not stored. They stay in your browser tab and vanish when you close it. They are never tied to your name or email.

Reviewed for lived-experience accuracy by Erin Caldwell, content contributor and self-identified autistic and ADHD adult · 27 August 2026. Not medical advice — no clinician has reviewed this page.

What ADHD actually is, in adults

ADHD is a neurodevelopmental condition that affects attention regulation, impulse control, and executive function. The DSM-5 recognises three presentations — predominantly inattentive, predominantly hyperactive-impulsive, and combined — and requires that symptoms have been present since childhood (before age 12) and cause functional impairment in more than one setting. About 2.5–4.4% of adults worldwide meet full criteria; population-level studies suggest the prevalence in adults is roughly stable across the lifespan once you correct for childhood under-diagnosis.

The stereotype — a restless boy who can’t sit still — describes one slice of one presentation in one age group. Adult ADHD looks different. Hyperactivity moves inward (an internal motor, racing thoughts, restlessness with no external fidgeting). Inattention shows up as half-finished projects, time-blindness, and a working memory that drops things mid-sentence. Emotional dysregulation — rejection sensitivity, fast big feelings, boredom intolerance — isn’t in the official criteria but is one of the most consistent adult reports.

Why adult ADHD gets missed for decades

Four overlapping reasons most ADHD adults weren’t flagged as children:

The criteria were built on children, mostly boys. The classic hyperactive-impulsive presentation maps to boys aged 6–12. Inattentive presentation — the daydreamer who quietly underperforms — is the one most often missed in girls and in academically capable kids who compensate well enough to stay off the teacher’s radar.
Intelligence and conscientiousness mask early on. ADHD doesn’t prevent academic success; it taxes it. Many late-diagnosed adults coasted through school on raw ability and last-minute deadline panic, only to hit the wall when life stopped providing external structure — usually university, the first real job, or parenthood.
Symptoms get misread as personality. “Lazy. Disorganised. Sensitive. Lives in your head. Always running late. Can’t finish anything.” Decades of being told these are character flaws produces shame, masking, and burnout — and rarely produces a referral for assessment.
Hyperactivity fades; the costly stuff doesn’t. The visible outward motor often quiets in the late teens. Executive dysfunction, time-blindness, and emotional dysregulation rarely quiet. Adults assessed in their thirties and forties often have been managing the same load with less ADHD-typical “tell” for a decade.

How this test works

Twenty items split across four dimensions, five items per dimension, on a 4-point frequency scale:

Inattention. Lost details, forgetfulness, drifting focus, avoiding sustained mental effort, careless slips.
Hyperactivity & impulsivity. Restlessness, internal motor, talking over people, impulsive decisions, discomfort with waiting.
Executive function. Time-blindness, task initiation, follow-through, working memory, costly task-switching.
Emotional regulation. Fast big emotion, rejection sensitivity, boredom intolerance, hyperfocus, interest-driven motivation.

Total ranges from 0 to 60. We use four bands rather than three so the middle band is more informative — the “some indicators” vs “notable indicators” split is where most adults wondering about ADHD actually land, and collapsing them loses information.

Can an online ADHD test actually diagnose ADHD?

No — and any online test that claims to is misleading you. This is the single most important thing to understand before you read your result, so it’s worth being completely straight about it: no questionnaire, on this site or any other, can diagnose ADHD. A diagnosis can only come from a qualified clinician, through a structured assessment that takes in your developmental history, rules out the other things that look like ADHD (anxiety, depression, trauma, sleep disorders, thyroid problems), and weighs how much the traits actually impair your life across more than one setting. A five-minute screen cannot do any of that.

So what is a test like this for? It is a screener, and a good screener does one job well: it tells you whether the pattern in your answers is the kind of thing that’s worth taking to a professional. That’s genuinely useful. Most people who eventually get an adult ADHD diagnosis spent years not even suspecting it — a well-built screen is often the thing that turns “I’m just lazy/scattered/broken” into “wait, is this a recognised thing I could get assessed for?” It moves you from private self-blame to a concrete next step. It cannot move you to a diagnosis.

A few honest limits worth holding in mind as you read your score:

It relies on self-report. You’re rating your own experience, which is subjective and shaped by mood, insight, and how you happen to feel today.
It can’t see masking or compensation. If you’ve spent decades building workarounds, you may score lower than your underlying profile — a low score doesn’t rule ADHD out.
It can’t tell ADHD apart from its lookalikes. Anxiety, depression, trauma, and chronic exhaustion all produce attention and focus problems. Only an assessment untangles which is which — and they often co-occur.
A high score isn’t a verdict, and a borderline one isn’t a dismissal. Both just mean “here’s a signal worth exploring properly.”

That’s not a reason to distrust the result — it’s the reason to use it for exactly what it’s good for. Take the pattern it surfaces, especially the dimension breakdown below, and bring it to someone qualified to do the part a questionnaire can’t.

What the four result bands mean

Few indicators (0–17). Adult ADHD doesn’t strongly emerge from your answers. Doesn’t rule it out — especially if you mask heavily or your difficulties sit in one specific area — but a different framing may fit.
Some indicators (18–31). Several ADHD-type patterns show up. A moderate total with one or two elevated dimensions is a real signal worth understanding.
Notable indicators (32–44). Your responses line up with adult ADHD across more than one dimension. Worth taking seriously — the subtype lean shows whether it’s inattentive, hyperactive-impulsive, or combined.
Strong indicators (45–60). Strong alignment across multiple dimensions. If you haven’t already, this is worth taking to a clinician who specifically assesses adult ADHD.

The result page also shows a subtype lean computed from the two core clinical dimensions, plus a dimension breakdown showing which clusters of traits drove your score. Two adults can hit the same total with very different profiles — the breakdown matters more than the number when you take it to a clinician.

What to do next, depending on the result

If you want the long-form read: the adult ADHD recognition guidegoes deep on what late diagnosis actually looks like, the inattentive presentation, why women get missed for decades, and what helps after diagnosis.
If autism + ADHD both feel like you: take the AuDHD test. Roughly 40–50% of autistic adults also meet ADHD criteria, and the combined profile doesn’t fit either condition alone.
If you want a formal assessment: see the diagnosis guide. It covers what the assessment actually involves, what to ask a clinician on a first call, what the cost ranges look like privately vs through public healthcare, and how to tell whether someone has adult-ADHD experience or only child-ADHD experience.
If emotional regulation came up strong: the RSD (rejection sensitive dysphoria) guide covers one of the most-reported and least-talked-about parts of adult ADHD.

A note on women and late-diagnosed adults

The clinical literature on ADHD was, for most of the twentieth century, built on hyperactive boys. Women and late-diagnosed adults consistently present differently — more inattentive than hyperactive, more emotional dysregulation, more anxiety co-presentation, more masking — and have been routinely missed by tools and clinicians calibrated on the original samples. If you’re reading this and you spent decades being told you were “sensitive,” “disorganised,” or “just anxious,” you are far from alone.

Who built this

Neurodiverge App is a small independent team. We aren’t a clinic. We aren’t selling assessments. We don’t take ad money from clinical providers we wouldn’t recommend to our own friends. The screens, the long-form guides, the editorial — all built from validated instruments and the first-person accounts autistic and ADHD adults have published, corrected in the open when readers flag something. More on the About page.

More self-screens

AuDHD Test— 20 questions calibrated for the autism + ADHD overlap.
Neurodivergent Test — a broader umbrella screen across autism, ADHD, dyspraxia, dyslexia, sensory, and tics.
Sensory Profile Test— which of the seven sensory channels runs hot, which runs cold.

Free ADHD Test