A free online ADHD test cannot tell you if you have ADHD. NHS inform is the national health information service for Scotland. It says ADHD cannot be confirmed by any single test or checklist. NICE, whose health guidelines cover England and Wales, says rating scales alone should not be the basis of a diagnosis. It says the diagnosis should come from a specialist trained in ADHD.

This page is general information, not medical advice.

Free online ADHD tests

The Royal College of Psychiatrists writes about quizzes. Its page on ADHD in adults was published in June 2023. It speaks to people who have tried one:

You might have used a questionnaire or quiz to find out whether you have ADHD. Questionnaires can help with the assessment process but ADHD can only be accurately diagnosed with:

a comprehensive interview

a consultation-based assessment

The names the official pages use

In the pages we read, the health bodies use a few names for forms used in an assessment:

NICE writes of rating scales. It says they are “helpful added tools” when a specialist makes a diagnosis.
The Royal College of Psychiatrists uses the word questionnaires. It also writes of “structured assessment tools”.
The NHS website says a child’s assessment may include forms to fill in. They may come before the appointment or as part of it.

NICE and the NHS website both place these forms inside an assessment by a specialist.

Forms and symptoms

The Royal College of Psychiatrists links these tools to symptoms. It sets out what belongs in a thorough assessment report. One item is a discussion of your ADHD symptoms and whether they meet the criteria for a diagnosis. The college says this step “is usually supported by structured assessment tools and questionnaires”.

On the NHS website for England, ADHD symptoms are described like this:

Symptoms of ADHD involve your ability to pay attention to things (being inattentive), having high energy levels (being hyperactive) and your ability to control your impulses (being impulsive).

Our page on the types of ADHD has more detail.

Do official ADHD pages mention a free test?

We read seven ADHD pages on 21 October 2026, from the NHS website, nidirect, NHS 111 Wales and NHS inform. We also read the recommendations in NICE’s ADHD guideline. We searched the text of each page for the word “free”. None of them uses it.

The NHS website’s page on ADHD in adults ends with a list of places for help and support. One of them is the organisation ADHD UK. Under its name, one link is labelled “Adult ADHD self screening tool”. The page says nothing else about that tool. The NHS 111 Wales page for adults has the same link.

Screening is not the same as a diagnosis

The NHS website has a general page about the screening it offers in England. The screening programmes on that page do not include ADHD. But the page explains what the word means. It says screening is “a way of finding out if people have a higher chance of having a health problem”.

The same page says what a screening result means:

A higher-risk result means you may have the condition.
You are then offered further tests, called diagnostic tests, to find out if you have it.
Screening tests “are not 100% accurate”.

These points are about NHS screening in general. They are not about ADHD.

For children, NICE says this about screening in schools:

Universal screening for ADHD should not be undertaken in nursery, primary and secondary schools.

In plain words, NICE says schools should not screen all their pupils for ADHD.

What a result can and cannot tell you

What it cannot tell you

A result cannot confirm ADHD. NHS inform makes this point on both its adult and its child pages. The Royal College of Psychiatrists, on its page for parents, puts it this way: “There is no one test for ADHD.”

Other conditions are part of the picture too. The adult page from NHS inform says:

Your symptoms and their impact should be considered as part of a full assessment of your health. This will help to rule out other conditions which could be mistaken for ADHD.

The same page says symptoms can show up in more than one condition. Its example is trouble concentrating, which can be a sign of depression or of ADHD. The NHS website for England adds that a GP may think about other conditions too. It gives autism, Tourette’s and anxiety as examples.

NICE lists what an ADHD diagnosis should rest on:

a full assessment, both clinical and psychosocial, of the person
a full history covering their development and their mental health
reports from other people who have observed them, and a check of their mental state

Rating scales are not on that list. A thorough report would include what others who know you say, according to the Royal College of Psychiatrists. The college adds “especially how you were as a child, if available”.

Children’s behaviour changes with age

Parents may wonder about a young child. The NHS website for England notes that many children are easily distracted, impulsive and full of energy. It says this is especially so for children under 5, and that it “does not mean they have ADHD”. It adds: “It could be a sign of something else, like being tired, anxious or stressed.”

nidirect, for Northern Ireland, makes a similar point. It says it is normal for young children to get bored, restless or inattentive at times. NHS inform says our ability to focus usually gets better as we get older.

What it can tell you

The pages we read say little about what a result can show. What they do say about forms is that they can help an assessment.

None of the four nations’ ADHD pages we read says what a test score means. We searched the pages from the NHS website, nidirect, NHS 111 Wales and NHS inform for the words “score” and “result”. The search was on 21 October 2026.

The NHS screening page also says a screening test “could also miss a problem”. It says this could lead people to ignore symptoms later. That page is about screening in general, not about ADHD.

The NHS website’s advice on when to see a GP is not about a test result. It is about how your symptoms affect your life.

What to do with a result

The NHS website for England gives this advice for adults:

If your ADHD symptoms are affecting your studies, work or relationships, make an appointment with a GP to find out what support is available.

NHS 111 Wales gives the same advice. NHS inform, for Scotland, points adults to their GP practice. It says this applies if you think you may have ADHD “and it’s having a negative effect on your life”. The Royal College of Psychiatrists gives similar advice.

The NHS website suggests that, for a child, you first talk with one of their teachers. If worries remain, it says you may want to see a GP. The table below gives the steps in each nation.

Getting ready for the GP

The NHS website has a general page on what to ask your doctor. It is not about ADHD. It covers a first GP appointment, a specialist appointment and a mental health assessment. Its tips include:

write down details of your symptoms, including when they started and what makes them better or worse
write down your 2 or 3 most important questions
ask a friend or family member to come with you, if you like

The NHS tells adults that the GP will ask about your symptoms and how they affect your life. The GP may then decide to refer you for an assessment. A mental health professional specialising in ADHD would carry out that assessment.

The steps to a formal assessment

NICE’s guideline covers England and Wales. It says ADHD should only be diagnosed by a paediatrician, a specialist psychiatrist or another health professional who is appropriately qualified. That person should be trained in diagnosing ADHD and have expertise in it. Primary care practitioners, NICE says, should not make the first diagnosis for a child or young person.

Among other things, NICE says the symptoms should:

cause at least moderate problems, whether psychological, social, or in education or work
happen often, in 2 or more important settings, such as social life, family, education or work

Our guide to the NHS ADHD assessment lists the topics a specialist asks about.

Where to start in each UK nation

The NHS website for England states that information about NHS services can vary in other parts of the UK. So each nation’s row in the table below comes from its own pages.

Nation	Adults	Children	Page and date
England	See a GP if symptoms affect your studies, work or relationships. The GP may refer you to a mental health professional who specialises in ADHD.	Talk to a teacher first. If support at home and school is not helping, ask a GP or the SENCO how to request a referral. The SENCO is the school’s special educational needs co-ordinator.	NHS website, adult and child pages, reviewed 19 March 2025
Wales	NHS 111 Wales says NHS Wales adapted its ADHD pages from the NHS website. It gives the same first step: a GP appointment.	The same steps as England: a teacher, then the SENCO or a GP.	NHS 111 Wales, adult and child pages, updated 4 July 2025
Scotland	Speak to your GP practice. There is no standard way to assess ADHD in Scotland. How you are assessed depends on your health board area.	It may help to talk to the child’s teachers before the GP. The GP cannot formally diagnose ADHD. How a child is assessed depends on the area they live in.	NHS inform, adult page updated 23 June 2026, child page updated 18 June 2026
Northern Ireland	The nidirect ADHD page is mainly about children. See the note below the table.	Tell your doctor your concerns. If the doctor thinks your child has ADHD, they may refer them to a specialist. The specialist may want to speak to you and to the child’s teachers.	nidirect (no date shown)

For Northern Ireland, the Department of Health answered a Freedom of Information request on 30 June 2026 (reference DOH 2026-0116). It said there is currently no commissioned ADHD service there. It also said there is no regionally commissioned ADHD assessment pathway. It suggested contacting the HSC Trusts for more information.

Right to Choose in England

Right to Choose is an NHS route in England. The NHS says: “You can ask for an NHS appointment at any clinic, including a private clinic, if it provides ADHD services for the NHS in England.” A referral is needed. NHS England’s patient choice guidance says: “The legal rights do not extend to self-referrals or any referral other than from or on behalf of a GP, Dentist, or Optometrist.” Our Right to Choose guide explains the steps.

If you are thinking about a private assessment

NHS inform, for Scotland, asks you to check before you get one. It says to make sure your local NHS health board and GP practice will accept it. It warns that they may not accept the outcome of a private assessment. The Royal College of Psychiatrists also says to make sure your local NHS service will accept it. Our shared care guide covers what a GP practice may do after a private diagnosis.

Finding a clinic

You can see private ADHD clinics in the UK on our clinics page. Some UK clinics are not on it.

Sources

Sources checked on 21 October 2026.

Free ADHD Tests Online: What They Can and Cannot Tell You