Strøm.dk is a small fun project. On Størm.dk you can calculate what it costs to have a given device switched on. Free and easy! Strøm is based on the Danish electricity pricing, so it’s pretty useless outside Denmark. By feeding Strøm.dk with a device, e.g. a Playstation and a time pattern, e.g. 2 hours a day, you can calculate the price to play – per day, week and year.