Work out iron energy cost instantly with clear inputs, formula shown and shareable results.
An iron's thermostat cycles the element, so a 2,400 W iron averages around 1,100 W in use. Forty-five minutes a week works out to about twelve pounds a year — small, but the peak draw is high enough to matter on a shared circuit.
Iron cost
effective kW = rating x duty cycle; annual = kW x hours per week x 52 x tariff
Steam settings and heavy fabrics keep the element on longer. A dry low setting on synthetics might only be 25% duty.
More power while running but often less overall, because it irons faster and needs fewer passes over each garment.