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Both calculators run independently β€” change the inputs on either side to compare results.

Time Zones

Jet Lag Recovery Calculator

Estimate the number of days needed to fully resync your circadian rhythm after long-haul travel, weighted by time-zone shift, direction (eastward is harder), age, and travel frequency. Use it before a trip to plan meetings and downtime realistically.

Fill in the required fields to see your result.
Time Zones

Travel Jet Lag Recovery Calculator

Estimate how many days of jet-lag recovery you can expect after a long-haul flight, based on time-zone gap, flight length, age, and travel experience. Use it before booking trips to plan rest days.

Fill in the required fields to see your result.

Key differences

Jet Lag Recovery CalculatorTravel Jet Lag Recovery Calculator
CategoryTime ZonesTime Zones
Inputs required45
ResultRecovery Time (days)Jet Lag Recovery Days (days)
What it doesEstimate the number of days needed to fully resync your circadian rhythm after long-haul travel, weighted by time-zone shift, direction (eastward is harder), age, and travel frequency. Use it before a trip to plan meetings and downtime realistically.Estimate how many days of jet-lag recovery you can expect after a long-haul flight, based on time-zone gap, flight length, age, and travel experience. Use it before booking trips to plan rest days.