Abstract: A kilowatt-hour counter (10) is provided that accepts the male plug of a standard US household appliance and that is plugged into a standard US household electrical socket. An extremely low ohm resistor is used to create a voltage proportional to the electrical energy used. This voltage is used by an Analog Devices Energy Monitoring Integrated Chip, along with a Microchip Corporation microprocessor, to produce and display a kilowatt-hour count. Two alternate embodiments are presented. In the first, the kilowatt-hour counter is mounted behind a standard 2-female outlet (20). In the second, the kilowatt-hour counter is mounted behind a standard 1-switch wall switch (30).