electricity cost for computer

bilbo_2

could anyone help

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

Thanks

Magentasue

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

It really depends on what tariff you are on...what is the price of the tariff you are on?

bilbo_2

southern electric standard

KimYeovil

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

thats thats very helpful

Cardew

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

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.