Going to Australia let learn more about the power they use which is 220-250 volt system, that means your item from USA or 110 Volts will not work there, you will need a Voltage Converter Transformer.

To determine the voltage requirements, you’ll need to look at the appliance. Power requirements are usually displayed on the appliance on the back where the cord is attached. Laptops and other equipment that have a detachable cord often have a box in the middle of the cord or a large box at the plug end that displays the input power requirements.

It is recommended that travelers use a transformer that is rated at least 50% higher watt than that of the appliance with which you intend to use it. For example: A 500 Watt appliance should be used with a transformer of at least 750 Watts. Purchase a transformer that is at least 50% higher than the required wattage. Travelers will need either a Voltage Converter orTransformer, depending on the type of equipment and a Plug Adapter that is compatible with outlets in the destination country.

To calculate watts from amps, use the following formula.

AMPS X VOLTS = WATTS
.5 A X 120V = 60W so you will need 100 watt step up and down transformer

Note: Lower efficiency factor equals the better quality of the voltage transformer.
Efficiency Factors of the transformers:

Efficiency factor x Watt of your item = Min. Watt required of the corresponding E. factortransformer

If your item is 600W:
1.25 x 600 = 750W -> LiteFuze convertingbox 800
1.50 x 600 = 900W -> LiteFuze VT-1000
2.00 x 600 = 1200W -> LiteFuze LR-1500
2.50 x 600 = 1500W -> Generic ST-2000 or Generic AR-3000
*Lower efficiency factor equals the better quality of the voltage transformer.

Buy LiteFuze Voltage Converter/Transformers

To determine that watts required, you’ll need to refer to the power requirements listed on theappliance.

If your Item is 60 Watts - You Need LiteFuze Convertingbox 100
If your Item is 150 Watts - You Need LiteFuze Convertingbox 200
If your Item is 230 Watts - You Need LiteFuze Convertingbox 300
If your Item is 460 Watts - You Need LiteFuze Convertingbox 500
If your Item is 730 Watts - You Need LiteFuze Convertingbox 800
If your Item is 930 Watts - You Need LiteFuze Convertingbox 1000
If your Item is 1090 Watts - You Need LiteFuze Convertingbox 1500
If your Item is 1800 Watts - You Need LiteFuze Convertingbox 2000
If your Item is 2800 Watts - You Need LiteFuze Convertingbox 3000

Type I

The Type I Electrical Plug has two flat, oblique blades that form an inverted V, and a grounding blade. Used in American Samoa, Argentina*, Australia, China, El Salvador, Fiji, Guatemala, Kiribati, Nauru, New Zealand, Okinawa, Panama, Papua New Guinea, St. Vincent, Tajikistan, Tonga, Uruguay.