Think you're getting enough shut-eye? You may want to take this test, which reveals just how sleep deprived you really are.
The new tool will reveal your sleep loss to show your weekly, monthly, yearly and even lifetime deprivation, as well as what else you could have done in that time.
The tool also reveals how many hours people have been kept awake thinking about various things, such as food, work and sex.
The team at the interior brand Hillarys.co.uk are behind the Lost Sleep Calculator.