PIC: This is the amount of sleep you need to be in a good mood the next day

From now on, we're making sure we get our eight hours...

It's no secret that if you get a poor night's sleep, you're probably going to be a cranky monkey in work the next day, it's basically scientific fact at this stage. But how much sleep do you need to ensure that people don't need to be walking on eggshells around you the next day? It seems you need quite a bit if this graph by Jawbone is anything to go by... Jawbone are one of the market leaders in wearable activity trackers and they've compiled the data of hundreds of thousands of their users and worked out how sleeping patterns affect happiness. Below is a snap shot of the infographic on Jawbone's blog post, it reveals that you need 8-9.5 hours sleep per night to be in your optimum mood the next day. But their study revealed that getting more than 8 hours of sleep on a daily basis doesn't work for everybody. But it did find that on "nights that you get an extra hour of sleep compared to normal, you wake up 5% happier than you usually do". The study also found that people are twice as unhappy when they’ve lost 2 hours of sleep, than they are happier gaining 2 hours of sleep. You can find even more information on the effects of sleep and also interactive infographics by visiting the Jawbone blog post.