Travel Health Tool

Jet Lag Calculator

Calculate your jet lag recovery time and get personalized recommendations for minimizing travel fatigue

Travel Details

Travel Direction

Departure Time Zone

Arrival Time Zone

Time Difference: 6 hours

Departure Time

Flight Duration (hours)

Age (years)

Normal Bedtime

Normal Wake Time

Sleep Quality

Exercise Frequency

Caffeine Consumption

I am a frequent traveler (5+ trips per year)

Medical Disclaimer: This calculator provides general guidance only. Consult healthcare providers for personalized medical advice, especially if you have health conditions or take medications.

Calculate Your Jet Lag

Enter your travel details to get personalized jet lag recovery predictions and recommendations

Understanding Jet Lag and Recovery

Learn about jet lag causes, symptoms, and evidence-based strategies for faster recovery

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What is Jet Lag?

Jet lag is a circadian rhythm disorder that occurs when your internal body clock is out of sync with the time zone you're in.

Common Symptoms:

•Fatigue and daytime sleepiness

•Difficulty sleeping at night

•Difficulty concentrating

•Digestive issues and appetite changes

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Travel Direction Matters

Eastward Travel (Harder)

Advancing your sleep schedule is more difficult than delaying it

Westward Travel (Easier)

Delaying sleep comes more naturally to most people

Recovery Rule:

Generally expect ~1 day of recovery per hour of time zone difference, with eastward travel taking 30% longer.

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Light Therapy Benefits

Light exposure is the most powerful tool for resetting your circadian rhythm.

Best Practices:

•Seek bright light when you want to be awake

•Avoid bright light when you want to sleep

•Natural sunlight is most effective (10,000+ lux)

•Light therapy boxes can supplement natural light

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Individual Factors

Factors That Worsen Jet Lag:

•Advanced age (slower adaptation)

•Poor baseline sleep quality

•High caffeine dependence

•Sedentary lifestyle

Protective Factors:

•Regular exercise routine

•Good sleep hygiene

•Frequent travel experience

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Melatonin for Jet Lag

When to Use

• Time zone differences ≥3 hours

• Eastward travel especially

• Multiple time zone crossings

Proper Timing

• 30 minutes before desired bedtime

• At destination time zone

• Start on arrival day

Important Cautions

• Consult healthcare provider first

• May interact with medications

• Can cause morning grogginess

Frequently Asked Questions

Common questions about jet lag and travel health

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Recovery Time

How long does jet lag last?

Recovery time depends on several factors, but the general rule is about 1 day per time zone crossed.

•Eastward travel typically takes 30% longer to recover from

•Age, health, and lifestyle factors affect recovery speed

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Prevention

Can jet lag be prevented?

While jet lag can't be completely prevented for long-distance travel, its severity can be significantly reduced.

•Pre-adjust sleep schedule 3-4 days before travel

•Use strategic light exposure and meal timing

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Supplements

Should I use melatonin or other supplements?

•Melatonin can be effective for time zone differences ≥3 hours

•Consult your healthcare provider before using any supplements

•Timing and dosage are crucial for effectiveness

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Exercise Impact

Does exercise help with jet lag recovery?

Yes! Exercise can significantly help reset your circadian rhythm and reduce jet lag severity.

•Exercise at destination local time to reinforce new schedule

•Light exercise outdoors combines movement with light therapy

•Avoid intense exercise close to bedtime