To locate the wattage of your microwave oven, open the door and look for a label near the base. This will often have the wattage printed on it, along with various other information. If it isn't there, check the rear panel, look in the manual, or search for the model number online.

It's important to find out the number of watts, because this affects how long it takes to cook foods. For example, six-hundred watt ovens take longer to heat a bowl of soup than eleven-hundred watt units. This also gives you an idea of how much electricity it consumes.