Jet Lag Adjustment
Estimate jet lag recovery days from time zones crossed.
About Jet Lag Adjustment
The body adapts roughly one day per full time zone, and more slowly when traveling east against the clock. Planning recovery days avoids scheduling meetings or drives while the internal clock is still misaligned.
Formula
Jet Lag Adjustment
Recovery days ~ time zones x 0.75 (east) or x 0.5 (west)
- time zones crossed
- Difference between origin and destination offsets
Worked example
With the default values below, Jet Lag Adjustment returns Recovery Time of 6.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Time zones crossedminimum 0
- 8
- Directionone of Eastbound, Westbound
- Eastbound
Results
- Recovery Time
- 6.0 days
- Recovery
- 144 h
- Outlook
- Significant jet lag; plan recovery days
Step by step
- 1Values used
- 2Jet Lag Adjustment
- 3Recovery Time= 6.0 days
- 4Recovery= 144 h
- 5Outlook= Significant jet lag; plan recovery days
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Jet Lag Adjustment calculated?
Recovery days ~ time zones x 0.75 (east) or x 0.5 (west) The body adapts roughly one day per full time zone, and more slowly when traveling east against the clock.
Why does Jet Lag Adjustment matter?
Planning recovery days avoids scheduling meetings or drives while the internal clock is still misaligned.
What values do I need to enter?
This calculator takes 2 inputs: Time zones crossed, Direction. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.