Jet Lag Recovery Calculator
Calculate the estimated recovery time from jet lag based on the number of time zones crossed and travel direction.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to use the Jet Lag Recovery Calculator:
- Enter time zones crossed: Type the number of time zones you traveled through (1–24) in the input field.
- Select travel direction: Choose Eastward (faster recovery, ~1 day per zone) or Westward (slower recovery, ~0.5 day per zone).
- Calculate: Click the Calculate Recovery Time button.
- Read your result: The estimated recovery days appear below, rounded to one decimal place. The formula used is also shown.
Note: All inputs use whole numbers only. No unit conversion is needed—just the count of time zones crossed.
Previous Results
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Frequently Asked Questions
The calculator uses a simple rule of thumb: for eastward travel, recovery takes about 1 day per time zone crossed; for westward travel, about 0.5 day per time zone.
The calculator accepts up to 24 time zones. For extreme crossings, recovery may vary, but the formula still provides a rough estimate.
Traveling eastward requires your body to adjust to an earlier time, which is generally harder than adjusting to a later time when traveling westward, hence the difference in recovery days.
