Learn exactly when to sleep to wake up energetically in the morning

A computer sleep calculator can tell you the best time to go to bed. The clever accountant reveals how much time you need to sleep and when you need to wake up combined with information on your body's natural sleep pattern, which functions in the 90 - minute cycles.

To wake up from an alarm during one of the 90-minute cycles is often what makes people feel bored in the morning, being so much harder to get out of bed, follows Clancosova. tv

So if you want to wake up feeling cool at 7: 00 a.m., go to bed at 21:46, 23:16, or 6: 00 a.m.

But if you want a little more sleep and you want to start on the 8 o'clock in the morning, then you can go to bed at 22.46, 12,16, 1,46, or 3.16 a.m.

Adults need up to nine hours of sleep per night, but all depends on the individual.

A recent survey by YouGov found that nearly half of the adult Britons are not sleeping from 7-9 hours recommended per night. Males seem to get worse, where 56 per cent of men say they don't sleep enough, compared to 53 per cent of women.

Lack of sleep may make you feel upset, but it can also affect your overall health.