I am bit rusty on my physics. I hope some of you can help me and check if what I have done is correct. I have an appliance which is rated for a voltage range of 110-127 volts, drawing 4.5 amps. I would like to use it on 220 volts using a 500 Watts converter. However, I just wanted to make sure that my calculation are correct so that I don't end up smoking the appliance or the converter or both. This is how I went about figuring it out. Power = volts x amps Therefore; the power rating of this appliance is between 495 Watts (110 x 4.5) to 572 Watts (127 x 4.5). So, I have a pretty high chance of burning out that voltage converter! Am I right? If so, how do you figure out what is a suitable rating for a power converter for this appliance? I know that power surges temporarily when turned on/off. Thank you all.