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Chronotype Test based on Michael Breus
20 questions about your real sleep hours, and at the end all four scores
Dr. Michael Breus demonstrated that our biological clock determines our peaks of energy, creativity and focus. These 20 questions are about the hours you actually keep, not the ones you wish you kept. At the end you get all four scores (Lion, Bear, Wolf and Dolphin) and the chronotype that leads in you, along with what that concretely changes about your day. The calculation runs in your browser, with no email and no account.
Based on the work of Michael Breus (2016)
Independent test offered by Profilia. This is not the official questionnaire by Michael Breus, who is neither associated with nor affiliated with Profilia.
Content updated in August 2026
Is the test scientifically validated?
What is the chronotype test?
What are the limits of this test?
Related articles
Method and numbers
- Questions
- 20 questions
- Actual median time
- 5 min 22 s
- Access
- Free, no account, no email
Observed profile distribution
Based on 142 recorded completions.
- Dolphin
- 36.6%
- Wolf
- 31.7%
- Bear
- 23.9%
- Lion
- 7.7%
These numbers are measured on real completions, not claimed. The time shown is the observed median, not an estimate.
About this test
The concept of chronotype refers to the biological profile that governs your natural preferences for sleep, waking, and activity over a 24-hour cycle. If some people feel at their best at dawn while others do not truly come alive until late evening, it is not a matter of willpower: it is the result of the circadian clock, the internal biological mechanism tied to the day-night rhythm and regulated by specific genes. Research by chronobiologist Jürgen Aschoff in the 1960s, followed by the large-scale work of Till Roenneberg (LMU Munich) across millions of subjects, established that this circadian rhythm varies considerably from person to person.
It was Dr. Michael Breus, a psychologist specializing in sleep disorders, who popularized in 2016 in his book "The Power of When" a classification into four chronotypes: the Lion, an early riser and ambitious planner who goes to bed early and makes best decisions in the morning; the Bear, the most common chronotype among humans, aligned with the sun and peaking between 10 a.m. and 2 p.m.; the Wolf, a night owl and creative thinker whose mind truly wakes up in the evening; and the Dolphin, a light, often insomniac sleeper with fragmented sleep and unpredictable energy.
Knowing your chronotype is not a trivial curiosity: it is a practical key to optimizing your productivity, health, and wellbeing. Scheduling your most demanding cognitive tasks at your circadian peak, adjusting your exercise or eating schedule, and stopping the fight against your natural rhythm can radically transform your daily experience. This free test reveals your chronotype in 20 questions.
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Your Chronotype
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Your strengths
Your areas to watch
Under stress
Your communication rhythm
Interactions with other chronotypes
Favor morning interactions. Be punctual and get straight to the point : they'll be less available later in the day.
Schedule your interactions around midday. Focus on friendliness and teamwork to motivate them.
Respect their need to start slowly. Suggest afternoon meetings and give them creative autonomy.
Be patient with their variable rhythm. Offer a quiet setting and one-on-one conversations rather than group meetings.
Ideal environment
Management style
Careers that suit you
What's next
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Go further
The chronotype test identifies your natural biological rhythm. It is not a medical diagnosis. Your chronotype may evolve with age and lifestyle habits.
Independent test offered by Profilia. This is not the official questionnaire by Michael Breus, who is neither associated with nor affiliated with Profilia.
Frequently Asked Questions
- This free test helps you understand your biological rhythm so you can organize your days in line with it. By knowing your chronotype, you can schedule your most demanding cognitive tasks at your concentration peaks, choose the right time for exercise, important decisions, or difficult conversations, and stop fighting a rhythm that is built into your biology.
- Yes, partially. Chronotype shifts in predictable ways with age: teenagers tend toward the Wolf (puberty-related circadian delay), adults often stabilize toward the Bear, and older adults frequently shift toward the Lion. Factors like light exposure, work schedules, and time zones can also influence it at the margins. But the underlying profile remains largely biological and stable.
- The test includes 20 questions about your sleep habits, relationship to mornings, energy peaks, and time-of-day preferences in real life. Allow about 4 to 5 minutes. Results are immediate, free, and require no sign-up: you get your dominant chronotype, a detailed profile description, and concrete recommendations for optimizing your day.