If you have a smart meter, your energy retailer will have a portal or app where you can check how much energy you have used retrospectively. It will show your usage in 30 minute blocks up until two days prior to the date you are checking on.
To check your usage in real time, you can use an energy monitor, like Powerpal. This will give you instant access to your electricity usage and allow you to identify power-hogs, inefficient appliances and improvements you can make to reduce your electricity use.