Depends on the power of the appliance. Electricity is sold in units which (i think) are per kilowatt hour. i.e. one unit is the cost of running an appliance of 1 kw for one hour. So say for instance you buy a 1kw machine and electricity units are at 6.5p then it will cost �0.39 per 6 hours - �2.73 a week or �141.96 a year. I stand to be corrected though.