A new online tool calculates how much of your life you've spent asleep - and what you could have achieved if you had been awake instead.

The test estimates the average number of days, weeks and years you have spent in the land of nod based on your age.

It also calculates how much time you're likely to have spent dreaming about a range of things - from money to sex - as well as the calories burnt while tucked up in bed.

The My Life Asleep calculator was devised by UK blind manufacturer Hillarys Blinds, also tells you exactly what you could have been doing had you not spent that time in bed.