Calculate the
how much the appliance costs to run per hour with the simple
power calculation below.
**unit cost** x**
power consumption in watts** divided by**1000**

**Example:**

A 100 Watt light on in a house paying 5p per unit
would cost:

**5p** x **100 **
/ **1000** = **.5p** (half a pence)
per hour to run.