Kilowatt Hour (kWh) Converter

Joules (J)

3,600,000

Watt Hours (Wh)

1,000

British Thermal Units (BTU)

3,412.14

Calories (cal)

860,421
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Understanding Kilowatt Hours (kWh)

A kilowatt-hour (kWh) is the standard unit used to measure electrical energy consumption. It represents the amount of energy used when 1 kilowatt (1,000 watts) of power is sustained for 1 hour.

Common Uses

Kilowatt-hours are primarily used by utility companies to measure and bill for electricity consumption. For example:

  • Running a 100-watt light bulb for 10 hours uses 1 kWh
  • A typical refrigerator uses 1-2 kWh per day
  • An average U.S. household consumes about 30 kWh per day

Conversion Formula

To convert kilowatt-hours to other units:

  • Joules = kWh × 3,600,000
  • Watt-hours = kWh × 1,000
  • BTU = kWh × 3,412.14
  • Calories = kWh × 860,421