Chronotype Quiz: Are You a Morning Lark or a Night Owl?

What Is a Chronotype?

Your chronotype is your body’s built-in timetable for sleeping, waking, and performing at your best. It’s controlled by a cluster of roughly 20,000 nerve cells in the brain called the suprachiasmatic nucleus (SCN), which acts as a master clock, syncing your hormones, body temperature, and alertness to a roughly 24-hour cycle.⁴

Most people fall somewhere on a spectrum from strong morning types (“larks”) to strong evening types (“owls”), with the majority landing in the middle. If you’ve ever felt sharp at 6 AM while your partner can barely form a sentence, or found yourself doing your best thinking at midnight, that’s your chronotype at work.

It’s not a lifestyle choice. Twin studies suggest that 40 to 54% of your chronotype is inherited, with genes like PER2, CRY1, and PER3 playing a direct role in how your circadian clock keeps time.⁹ The rest is shaped by age, light exposure, and daily habits, but the genetic baseline is surprisingly hard to override. That’s why “just go to bed earlier” rarely works for a genuine night owl.

This quiz measures where you sit on that spectrum and gives you a personalised sleep schedule based on the result. It won’t change your biology, but it can help you stop fighting it.

The Science Behind This Quiz

This quiz draws on the same dimensions used in peer-reviewed chronotype assessments, particularly the Morningness-Eveningness Questionnaire (MEQ) developed by Horne and Östberg in 1976.² The original MEQ is a 19-item questionnaire validated against core body temperature rhythms, one of the most reliable markers of circadian phase. It remains the most widely used chronotype tool in sleep research.

Our quiz condenses the assessment into 10 questions covering the dimensions that matter most: natural wake time, preferred bedtime, morning alertness, peak concentration, evening tiredness, alarm dependence, weekend drift, exercise preference, reaction to early commitments, and late-night energy. Each answer is scored from 1 (strongly evening) to 5 (strongly morning), giving a total range of 10 to 50.

We classify scores into three types. A score of 38 or above indicates a morning type, 24 to 37 an intermediate type, and 10 to 23 an evening type. These thresholds are proportionally consistent with the MEQ’s own three-band classification system.

A second widely used tool, the Munich Chronotype Questionnaire (MCTQ) developed by Roenneberg and colleagues, takes a different approach by using the midpoint of your sleep on free days as the primary measure.³ Their data from over 55,000 participants confirmed that chronotype follows a near-normal distribution, with most people sitting around the intermediate range and only about 25% falling clearly into morning or evening categories.

This quiz is a simplified self-assessment tool, not a clinical instrument. If you want a formal chronotype evaluation, ask your GP about a referral to a sleep clinic, where they can combine questionnaire data with actigraphy and melatonin sampling for a more precise picture.

Chronotype and Your Health

Being a night owl isn’t just an inconvenience in a world that starts early. A growing body of research suggests it comes with measurable health trade-offs, though the picture is more nuanced than the headlines tend to make it sound.

The largest study to date comes from the UK Biobank, where Knutson and von Schantz analysed data from over 433,000 adults. Those who identified as “definite evening types” had a 10% higher risk of dying from any cause over the 6.5-year follow-up period, compared to “definite morning types.” The association was strongest for psychological disorders, where evening types had nearly double the odds.⁵

These aren’t small numbers, but they come with an important caveat: much of the excess risk likely stems not from being an owl per se, but from being an owl forced into a lark’s world.

The relationship between chronotype and health isn’t destiny. It’s context. An evening type with a flexible job and a consistent sleep schedule may face no extra risk at all. The problems pile up when your biology and your timetable are constantly at odds.

Can You Change Your Chronotype?

The short answer: not completely, but you can nudge it. The longer answer depends on which parts of your chronotype you’re trying to shift and how far you need to go.

Your chronotype is 40 to 54% genetic.⁴ Variants in clock genes like CRY1, PER2, and PER3 directly influence how quickly your internal clock runs. A CRY1 mutation identified in 2017 adds roughly 30 minutes to the circadian cycle, which is enough to push carriers’ sleep timing noticeably later.⁹ You can’t edit your genes, so there’s a ceiling on how far you can shift.

What does change naturally is age. Children are generally morning types. During puberty, the clock shifts later, peaking around age 17 to 20, which is why teenagers genuinely struggle with early school starts. It’s biology, not laziness.⁸ After 20, the shift gradually reverses, and by the time you reach your 50s and 60s, you’re likely to be a good deal more morning-oriented than you were as a student.

Within those boundaries, environment and behaviour do matter. The most encouraging intervention study to date comes from Facer-Childs and colleagues in 2019. They took 22 confirmed night owls and asked them to follow a consistent routine: wake up 2 to 3 hours earlier than usual, get outdoor light in the morning, eat breakfast promptly, exercise only before mid-afternoon, avoid caffeine after 3 PM, and keep light low in the evenings. After three weeks, the participants had shifted their sleep timing roughly 2 hours earlier. Depression scores dropped by 58% and stress by 40%.¹⁰

That’s a meaningful shift, and it didn’t require any medication. But notice the emphasis on consistency. One bright morning won’t do it. The change requires daily reinforcement from light, meals, and activity, all working together to pull the clock in the same direction.

How to Work With Your Chronotype

The most practical thing you can take from this quiz isn’t a label. It’s permission to stop forcing yourself into a schedule that doesn’t fit and start building one that does.

For Morning Larks

Your peak concentration window is typically between 8 AM and noon, so front-load demanding tasks and save routine work for the afternoon. The trade-off is that your energy drops off early. If you’re flagging by 3 PM, that’s normal for your type, and a short post-lunch walk is more useful than caffeine at that point. Protect your evenings: late social events and screen use past 9 PM can push your sleep onset later than your body wants, creating a mild form of social jetlag even for larks. Aim for a consistent 9:30 to 10:00 PM bedtime.

For Intermediate Types

You have the most flexibility, which is both an advantage and a trap. Because you can adapt to early or late schedules without too much discomfort, it’s easy to drift toward staying up later than you should, especially during the week. Try to anchor your wake time within a 30-minute window, seven days a week, and let your bedtime follow naturally from there. Your concentration peaks around mid-morning to early afternoon (roughly 10 AM to 2 PM), so schedule the work that needs the most focus during that window.

For Night Owls

Your biology is working against a world that starts early, so the goal isn’t to become a lark. It’s to find the schedule that causes the least conflict between your clock and your commitments. Morning light is your most powerful tool: even 20 to 30 minutes of outdoor light within an hour of waking can advance your circadian clock, and research shows that morning exercise amplifies the effect by about 0.6 hours.¹¹ Keep meal times consistent and eat breakfast within an hour of waking, even if you’re not hungry at first. If your job allows any flexibility, pushing your start time back by even 30 to 60 minutes can reduce social jetlag enough to make a noticeable difference.

If you’re finding that your bedroom is too warm or too bright for falling asleep on time, those are solvable problems. A cooler sleeping surface, proper blackout curtains, and a room temperature between 16 and 18°C (per NHS guidance¹) can help you fall asleep earlier and stay asleep longer. Browse our mattress reviews or take our 60-second mattress quiz to find the right fit, and use our Sleep Cycle Calculator to time your bedtime to full 90-minute cycles.