electricity cost for computer

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bilbo_2
bilbo_2 Posts: 448 Forumite
could anyone help

what would be the electricity cost be for a 350w computer left on for 5 hours per day ??

Thanks

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  • Magentasue
    Magentasue Posts: 4,229 Forumite
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    This page might help, although you'll need to adjust for your tariff:

    http://www.sust-it.net/energy_saving.php?id=20&tariff=38
  • Businessgirl
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    It really depends on what tariff you are on...what is the price of the tariff you are on?
    GC January 2015 - £0/£120
  • bilbo_2
    bilbo_2 Posts: 448 Forumite
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    southern electric standard
  • KimYeovil
    KimYeovil Posts: 6,156 Forumite
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    The unit price of electricity is for 1kWh, ie a 1000W device switched on for 1 hour. A 350W device uses 350 /1000W every hour (when running flat out). So that's about 1/3 of a unit each hour. At 12p per kWh that would be 4p or 20p for five hours. Of course, if you are just browsing or reading email and not rendering 3D images or playing DVDs the computer will average much lower than that - usually 35 to 50 Watts.

    maximum cost per hour: wattage /1000 * unit price per kWh

    A plug-in monitor is the only way to get an accurate estimate for your particular useage pattern -
  • bilbo_2
    bilbo_2 Posts: 448 Forumite
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    thats thats very helpful
  • Cardew
    Cardew Posts: 29,038 Forumite
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    bilbo wrote: »
    could anyone help

    what would be the electricity cost be for a 350w computer left on for 5 hours per day ??

    Thanks

    The term '350w computer' is meaningless as a measure of consumption.

    350w is the power supply and the power that it is capable of delivering. My computer could be a '750w computer' and use less power than yours.

    In fact a 350w power supply is small by today's standards so I suspect your PC is old or a low spec?

    I would think that a high average figure would be 150w an hour so around 7p to 8p a day would be a reasonable estimate.
  • Premier_2
    Premier_2 Posts: 15,141 Forumite
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    KimYeovil wrote: »
    ...Of course, if you are just browsing or reading email and not rendering 3D images or playing DVDs the computer will average much lower than that - usually 35 to 50 Watts...
    My computer (including CRT monitor) draws that when it is 'switched off' :eek:
    and between 120W - 180W when used lightly, e.g. internet browsing
    Speakers are about another 10 W

    KimYeovil wrote: »
    ...A plug-in monitor is the only way to get an accurate estimate for your particular useage pattern -

    Good advice. That's how I discovered the above usage. :)

    Now I ensure my computer is disconnected from the mains when not in use - saves me a small fortune.
    "Now to trolling as a concept. .... Personally, I've always found it a little sad that people choose to spend such a large proportion of their lives in this way but they do, and we have to deal with it." - MSE Forum Manager 6th July 2010
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