Jet Lag Calculator
Pick your departure and arrival time zones to see how many hours you are crossing and an estimated number of days to recover.
Flying east is typically harder to adjust to — get morning sunlight at your destination and avoid long naps.
How to Use Jet Lag Calculator
- 1
Choose your departure time zone.
- 2
Choose your arrival time zone.
- 3
See how many time zones you're crossing and an estimated recovery time.
Jet Lag Calculator Features
- Estimates recovery time differently for eastward vs. westward travel, matching common jet lag guidance.
- Covers major cities and regions across every continent.
- Includes a quick tip based on your travel direction.
Why use Tool King?
Fast
No waiting rooms or sign-ups. Most files are ready in seconds.
Private
Files are processed in memory and discarded right after — never stored or shared.
Free
Every tool is free to use, with no hidden limits on the essentials.
Frequently Asked Questions
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