1. Web Hosting Master
Join Date
Jul 2003
Location
Posts
1,901

## Power Cost Calculations

How would I figure out how many kW/h a device uses? I want to figure this out so I can get an estimate of how much it'll cost to operate. It's consumtion is 715 Watts. Are there any calculators out there to do this for me?

2. Community Liaison
Join Date
Jul 2001
Location
.INdiana
Posts
2,448
1000 watts per kilowatt.

715/1000

0.715 kilowatts of power.. multiply that by the number of hours of use to get kWh

3. Web Hosting Master
Join Date
May 2005
Location
Sydney, Australia
Posts
876
And then go to your power companies website or price list and there you have it!

I had to do the same the other day...

4. Junior Guru
Join Date
Mar 2004
Location
Greater Chicagoland
Posts
181
Although it says 715 watts doesn't necessarily mean it's using that much power (depending what it is). A more exact method of measuring would be the use of a separate power meter. The devices can be pretty cheap and simply plug into the wall in between the outlet and your device. I've linked to a review of one below as an example, it's simply a result near the top from Google. I have no idea on this particular device's performance, etc.

5. Web Hosting Master
Join Date
May 2005
Location
Sydney, Australia
Posts
876
Yeah... for instance with a clothes drier it depends on the power setting you have it on. Same with most appliances.

6. Web Hosting Master
Join Date
Aug 2003
Posts
844
Originally posted by -T{H}R-
Yeah... for instance with a clothes drier it depends on the power setting you have it on. Same with most appliances.
On a more relevant note, idle computers use less than half the power than when they are being used 100%.

7. Web Hosting Master
Join Date
May 2005
Location
Sydney, Australia
Posts
876
How is that necessarily more relevant?

8. Web Hosting Master
Join Date
Aug 2003
Posts
844
Originally posted by -T{H}R-
How is that necessarily more relevant?
Not everybody uses a clothes drier, etc. Also, it was my guess that the "device" he is talking about was computer-related.

No harsh feelings ,

9. Web Hosting Master
Join Date
May 2005
Location
Sydney, Australia
Posts
876
By idle do you mean in powersaving mode or just when the CPU usage is at 0%?

10. Web Hosting Master
Join Date
Jul 2003
Location
Posts
1,901
Originally posted by ichris
Not everybody uses a clothes drier, etc. Also, it was my guess that the "device" he is talking about was computer-related.

No harsh feelings ,
I don't own the device yet, as it's \$45,000.

I'd need to colo it in a building somewhere here in the city, so I wanted a rough figure so I could offer to pay for it's power usage.

I can't figure out how to calculate this. So if it uses 715 watts we'll say, and the rate I pay is \$0.068/kWh, how much will it cost to run per year?
Last edited by MStar; 07-09-2005 at 12:34 AM.

11. Web Hosting Master
Join Date
May 2005
Location
Sydney, Australia
Posts
876
How many hours will you use it for per day/week/year?

12. Web Hosting Master
Join Date
Jul 2003
Location
Posts
1,901

13. Web Hosting Master
Join Date
May 2005
Location
Sydney, Australia
Posts
876
Ouch.

I make it:

24 (hours) x 365 (days) = 8760 (amount of hours in year)

8760 x .715 (usage per hour) x .068 (price per kw/h) = \$425.9112 (roughly 1% of the purchase price of your equipment)...

14. Web Hosting Master
Join Date
Jul 2003
Location
Posts
1,901
\$36/month. Not as harsh as I was expecting.
Less than 1%, as the machine is \$45,000 USD, and the power would cost \$426 CAD.

15. Web Hosting Master
Join Date
May 2005
Location
Sydney, Australia
Posts
876
If it's mission critical you'd obviously need to look at backup systems etc.

16. Web Hosting Master
Join Date
Jul 2003
Location
Posts
1,901
Of course.

17. Web Hosting Master
Join Date
Jul 2004
Posts
928
What type of \$\$\$ Expensive machine u talking about lol...

18. Web Hosting Master
Join Date
Jul 2003
Location
Posts
1,901
A really big wireless access point.

19. Web Hosting Master
Join Date
Jul 2004
Posts
928
Oh really lol...

20. Web Hosting Master
Join Date
Jul 2003
Location