Tools/Unit conversion/Energy Converter
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Energy Converter

Convert energy between joules, kilowatt-hours, calories, and British thermal units.

Energy Converter
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Input and result notes

A kilowatt-hour measures energy, not power: 1 kWh equals 3600000 J. cal and kcal differ by a factor of 1000, so check the complete unit label.

Unit conversion
  • Power Converter

    Convert power between watts, kilowatts, megawatts, and mechanical horsepower.

  • Illuminance Converter

    Convert illuminance between lux, phot, and foot-candles to compare lighting measurements.

  • Volume Flow Rate Converter

    Convert volume flow between liters per second, liters per minute, cubic meters per hour, and gallons per minute.

  • Radioactive Activity Converter

    Convert radioactive activity between becquerels, kilobecquerels, and curies using fixed unit factors.