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Jet lag calculator
See how many hours you will shift, whether you fly east or west, and simple tips to adjust.
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General travel tips only. Not medical advice.
Frequently asked questions
How is the time shift calculated?
The tool compares the current UTC offsets of the two time zones on your device, including daylight saving, and shows the shorter way round the clock.
How long does jet lag last?
It varies by person and direction. A common rule of thumb is about one day of adjustment per hour of shift, but experiences differ.
Is this medical advice?
No. These are general travel tips only, not medical advice. Talk to a doctor or pharmacist if you have a health condition or take medicine on a schedule.