**Associate**

So I've made a list of all my electric appliances, with the intention of estimating how many hours a day I use them, and how many watts of power they consume.

What's confusing me at the moment, is many of these things have the following :

input : 100-240V 0.3A

output : 7.5V 1.3A

I believe Watts is Volts x Amps - but am I calculating the imput or the output to calculate how much I consume?

i.e. would this particular appliance be 220v x 0.3A = 66W

or would it be 7.5v x 1.3A = 9.75W?