Carwow's found that almost four out of five (78 per cent) people have no idea how to calculate miles per kWh for an EV, which is becoming a crucial figure to understand as the switch to EVs ramps up ...

Example Calculate the cost of using a 2 kW heater for 6 hours if the price of a unit is 30 p. Number of units used = power rating in kW x time in hours Time = 6 hours Power rating = 2 kW ...

To calculate kilowatt-hours, take the wattage of any household appliance, multiply that by how many hours you think it's used and divide that by 1,000. So if you use a 100-watt light bulb for 10 hours ...