amps to watts

Discussion in 'Electrical and Wiring' started by Daryl in Nanoose, Jun 18, 2006.

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  1. Jun 18, 2006 #1

    Daryl in Nanoose

    Daryl in Nanoose

    Daryl in Nanoose

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    How do you calculate amps to watts?
     
  2. Jun 18, 2006 #2

    Square Eye

    Square Eye

    Square Eye

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    Volts x amps = watts @ 100% efficiency.

    You would need the length of the wire, the gauge of the wire and the co-efficient of the appliance you are powering to get real accuracy. The formula above is good for a ball park figure.

    100 watt light bulb
    120 volts


    = .833 amps, in a perfect world.
     
  3. Jun 18, 2006 #3

    inspectorD

    inspectorD

    inspectorD

    Housebroken Staff Member Admin Moderator

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    What are you up to?:D

    To early for christmas lights.......;)
     
  4. Jun 20, 2006 #4

    Daryl in Nanoose

    Daryl in Nanoose

    Daryl in Nanoose

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    Thanks guys, I am figureing out how big of a inverter to get and noticed some appliances have amps and no watts. Thanks again.
     
  5. Jul 1, 2006 #5

    PaPaDan

    PaPaDan

    PaPaDan

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    Here is an Ohms Law chart for colculating volts and currents. [​IMG] If you know 2 factors in your cicuit you can use this
    chart to find the additional information you need.

    Example = You want to add 3 light fixtures to your shop,
    each with 1 100 watt bulb and you know you have a 115 volt
    service. You would devide 300 (P) by 115 (E) to find (I) which
    would be 2.06. So now you know that your new circuit needs
    to be capable of handling 2.06 amps.
     
  6. Jul 19, 2006 #6

    Sauna

    Sauna

    Sauna

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    Easy now.. yeah no christmas light yet buddy!
     

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