The average wattage for a small household microwave oven typically ranges from 600 to 900 watts. However, it's important to note that wattage can vary among different models and brands. Some smaller microwave ovens may have wattages as low as 500 watts, while others may go up to around 1,200 watts. When purchasing a microwave oven, it's recommended to check the product specifications or consult the manufacturer to determine the specific wattage of the model you are interested in.