how much does it cost to run a iron
Report Abuse. According to Atlantic electricity the cost per kilo watt hour is 2.22 so to run a steam iron rated at 2400 W per hour would be 2.4 x 2.22 pence = 5.28 pence.Source(s): Atlantic electric prices summer 2006.Phil Â· 9 years ago.'m with Atlantic and it's about 12p per KWH. However an iron has a thermostat and does not draw the current all the time so it would be less than the full amount. I'd guess so something in the region of 20p.