Kilowatt Hour to Therm Converter

A kilowatt-hour (kWh) is a unit of energy equal to the energy consumed by a device with a power rating of one kilowatt operating for one hour. It equals 3.6 megajoules and is the standard unit for measuring electrical energy consumption.

The kilowatt-hour was developed with the commercialization of electricity in the late 19th century. It provided a practical way for electric utilities to measure and bill for electrical energy consumption, becoming the standard unit for electrical energy trading worldwide.

Kilowatt-hours are universally used for measuring and billing electrical energy consumption in homes, businesses, and industries. They're found on every electricity bill, used in energy efficiency ratings for appliances, and are standard in renewable energy system specifications and grid energy trading.

A therm (thm) is a unit of energy equal to 100,000 BTUs or approximately 105.5 megajoules. It's commonly used for measuring natural gas consumption and energy content in the United States gas industry.

The therm was introduced in the early 20th century by the gas industry in the United States as a convenient unit for measuring and billing natural gas consumption. It provided a practical scale for residential and commercial gas usage where BTUs would result in large numbers.

Therms are primarily used in the United States for natural gas billing, gas appliance ratings, and energy content specifications for natural gas. They're found on residential and commercial gas bills, used in gas utility planning, and for measuring heating energy consumption.