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Fatigue doesn't just make you feel bad — it costs you money. Enter how many productive hours you lose each day to fatigue and see what it adds up to.
If salaried, divide your annual salary by 1,760 (220 working days × 8 hrs)
Hours where you're at your desk but can't focus, making mistakes, or just going through the motions
What's actually causing your fatigue?
The number above is the cost. The quiz finds the cause — and gives you a personalised action plan.
Take the fatigue quiz →Fatigue costs the UK economy an estimated £50 billion a year in lost productivity, according to RAND Europe. Globally, the figure exceeds $400 billion. Unlike absenteeism — being off sick — most fatigue-related productivity loss happens through presenteeism: showing up but operating at a fraction of your capacity.
Research suggests chronically fatigued workers operate at 60–80% of their productive capacity on affected days. Over a working year, that adds up to weeks of lost output — with a measurable financial cost attached to it.
The calculator takes your hourly rate (derived from your salary and working hours), the number of days per week you are significantly affected by fatigue, and your estimated productivity reduction on those days. It then projects this weekly cost across a full working year. The methodology mirrors the approach used in RAND Europe's workforce productivity research.
RAND Europe estimated that fatigue-related presenteeism costs the average UK worker approximately £1,967 per year in lost productive output. For higher earners or those with more severe fatigue, the figure is significantly higher. The individual cost depends heavily on how many days are affected and by how much.
The most effective interventions depend on the cause of your fatigue. Sleep quality, nutrition, blood markers (iron, vitamin D, thyroid), stress levels, and medication side effects are the most common addressable factors. Our fatigue assessment helps identify which areas are most likely contributing in your case.