Jet Lag Calculator
Free Jet Lag Calculator in your browser with live zones, DST-aware offsets, and planning tools. Estimate jet-lag severity with sleep and light exposure.
How to Use
- 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.
Features
- Jet Lag Calculator with live updating clocks and IANA timezone data
- Searchable cities and timezone selection
- 12-hour and 24-hour display options where supported
- Automatic daylight saving adjustments
- Copy, export, and share actions for planning results
- Responsive layout for desktop, tablet, and mobile
Real-World Use Cases
- Layover feasibility checks in airport local time
- Red-eye arrivals with jet-lag recovery planning
- Crew and dispatcher ETA sanity checks
- Family pick-ups aligned to arrival clocks
- Multi-city vacations with per-leg zone tracking
Practical Examples
Fullscreen the jet lag calculator on a wall tablet, add your team's cities, and glance at offsets before starting a video call.
Stack home and destination clocks, convert departure local to arrival local, and set alarms in destination time before you board.
Benefits
- Instant browser access without installing a world-clock app
- DST-aware offsets prevent off-by-one-hour scheduling mistakes
- Multiple zones on one screen for distributed teams
- Free core utility with no account required for daily coordination
Timezone Tips
- Seek morning light at destination on day one.
- Delay caffeine until local morning.
- Avoid napping longer than twenty minutes before local bedtime.
Frequently Asked Questions
What is the
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.
Does it work on mobile?
Yes. Pages are responsive for phones, tablets, and desktop browsers.
Can I copy or share results?
Yes. Use Copy, Export, or Share in the results bar when available.
Do I need to install an app?
No. Everything runs in the browser without a download.