Time must be reserved for recovering from work-related travelling

Time must also be reserved for recovering from time spent travelling, especially when flying across time zones. The jet lag calculation formula helps you reserve sufficient time for recovery. Also familiarise yourself with tips on recovering from travelling.

Flying across time zones changes a person's day rhythm by the number of hours of the time difference.

The duration of jet lag in days can be derived from the calculation formula:

  • When flying west: the number of time zones crossed / 2.5
  • When flying east: the number of time zones crossed / 2
  • For example, recovering from a jet lag of an eastbound flight across 10 time zones takes 10 : 2 days, i.e. 5 days.

(Source: Härmä&Sallinen: Hyvä uni – hyvä työ. Finnish Institute of Occupational Health.)