How much does it cost to run?
This calculator works for any item, not just servers. Just fill in the fields below and click submit.

This works for any currency. Ignore the sign and use your own currency as if it were 's.

Total Wattage: watts (e.g. 100 watts)

Electricity Cost: pence per kWh (e.g. 7.4)

Run Hours: hours per day


If you would like to download this script for your own personal use, click the link below, copy and paste the source code and save it into a PHP file. Then you can run it on your own PHP enabled Web Server.


You must name the script calculator-runningcosts.php otherwise you will need to do the following:

Change the "action=" filename to the name you gave the file on the line
<form name="form1" action="calculator-runningcosts.php" method="post">

Approximate Wattages (items listed in alphabetical order):

CRT Monitor: 120w
Desktop PC: 200w
External Hard Drive: 25w
Inkjet Printer: 50w
Lazer Printer: 1000w
Modem: 25w
Notebook PC: 80w
Router: 25w
TFT Monitor: 60w
USB Hub: 25w