Free chronotype calculator
Discover if you're a morning lark, night owl, or intermediate type. Get your personalized optimal routine based on your natural circadian rhythm.
Legal Notice and Limitation of Liability
This chronotype calculator is an educational tool based on the Morningness-Eveningness Questionnaire (MEQ) by Horne and Östberg. The results do NOT constitute medical diagnosis, clinical advice, or therapeutic recommendation of any kind. Always consult with a qualified healthcare professional before making significant changes to your sleep, exercise, eating schedules, or lifestyle.
If you could choose freely, what time would you go to bed?
Why is it important to know your chronotype?
Greater Productivity
Schedule your most important tasks during your peak performance hours
Better Rest
Optimize your sleep schedule to wake up more rested and energized
Overall Wellness
Align your routine with your biological clock to improve your integral health
What a chronotype is
Your chronotype is your biological clock’s natural preference for early or late hours: when you would wake without an alarm, when you perform best and when sleep hits you. It depends mostly on genetics, age and light exposure, and you don’t choose it: you find it out.
It is usually summed up in three types. Lark (morning type): wakes early without effort and performs best in the morning. Owl (evening type): starts late and peaks in the afternoon or evening. Intermediate: most of the population, with some flexibility either way.
How this test works
It is 8 multiple-choice questions inspired by the Horne and Östberg Morningness-Eveningness Questionnaire (MEQ) from 1976, the most widely used instrument in sleep research. Your answers add up to a type (lark, owl or intermediate), a subtype (extreme or moderate) and an indicative percentile on the scale.
- Two minutes, no sign-up and no email.
- The calculation runs in your browser: no answer is sent to any server.
- The result includes typical traits of your type and suggested windows for sleep, meals and training.
Why knowing your chronotype helps
- Set the alarm where your body already wakes up, not where habit says.
- Put demanding training and focused work in your highest-energy hours.
- Move your last meal and your caffeine earlier if you are an owl who sleeps badly: they are the two cheapest levers.
- Tell Kodi, Biokode’s coach: it remembers it and takes it into account when suggesting meal and rest times.
Limits of the test
The result is based on what you report, not on a measurement. Shift work, jet lag, small children or a stressful period can shift your answers away from your biological preference. Treat it as an indicative snapshot, not a diagnosis: it does not replace a medical assessment or a sleep study.