Jet Lag Calculator
About the Jet Lag Calculator
Crossing many meridians beats your circadian rhythm. This Jet Lag Calculator estimates severity from hour difference and flight length, then suggests light and sleep adjustments. Athletes arriving for tournaments, executives on red-eyes, and students on exchange programs plan recovery days. Estimate jet-lag severity with sleep and light exposure guidance.
How to use it
- Open the Jet Lag Calculator and enter departure city, destination, and travel date.
- Add flight duration, layovers, or airport codes as prompted.
- Read arrival local time, body-clock hints, or tower clock at connection.
- Adjust plans if layover windows are too tight in airport local time.
- Save sleep or recovery notes before you board.
Good to know
Times come from your device clock plus the time zone you pick. After a daylight-saving change, confirm the zone name, not just the city label.
Frequently asked questions
What is the Jet Lag Calculator?
It estimates jet-lag severity from hour difference and flight length, then suggests sleep and light exposure adjustments.
Is the Jet Lag Calculator free?
Yes. Core world-time features are free and do not require an account.
How accurate is the time shown?
Time uses your browser Intl API with IANA timezone data and updates every second.
Does daylight saving time apply automatically?
Yes. Offsets adjust for DST transitions based on the selected zone and date.
Can I compare multiple cities?
Yes on layouts that support grids or compare views; add zones with search.
Related
Saved settings stay in this browser. Read the privacy policy and terms.