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Voltage converter

  1. May 19, 2017 #1
    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.
  2. jcsd
  3. May 19, 2017 #2


    User Avatar

    Staff: Mentor

    It probably won't burn out, but the output voltage will sag and your appliance will probably not work right.

    Just go with a 2x factor -- use a 1000W converter.
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