How to measure your own level of fatigue

The best and easiest way to measure your own level of fatigue is to know when to say ‘”I’m stuffed, I’m knackered, I’ve had enough!” By making this bold exclamation, as a result of a rigorous self-evaluation process, you have identified those symptoms of fatigue that are affecting your performance, not to mention your personality.

The other way to measure your fatigue is to have someone else, someone you trust, make the fatigue assessment. They should know the trigger signs and indicators that change your behaviour including;


  • falling asleep
  • head nodding
  • heavy eyes
  • lack of co-ordination
  • headaches
  • double vision


  • making errors
  • poor decision making
  • lack of concentration
  • lapses in memory


  • irritable and moody
  • lethargic
  • quiet and withdrawn or loud and aggressive

You and your aviation organisation can develop a plan for managing and measuring fatigue. Whatever options you choose, educating and showing how you can deal with fatigue will have positive effects on safety.

In addition, there are a number of smartphone apps available that will record your sleep patterns for you. These bio-alarms claim that they can analyse your sleep patterns and wake you during your lightest sleep phase.

This one seems to be a popular choice:

You can also try the ACC driver fatigue calculator on the right.

Claude Preitner talks about fatigue