Most household microwave ovens typically operate on a standard voltage of 120 volts in North America and 230 volts in many other parts of the world. However, it's important to note that voltage requirements can vary based on the specific model and manufacturer. Always refer to the manufacturer's documentation or the label on the microwave itself to determine the exact voltage requirement for your specific microwave oven. Using the wrong voltage can result in damage to the appliance and potentially pose safety hazards. If you're unsure about the voltage requirements, it's best to consult the manufacturer or a qualified electrician.