Gram calories to Gigawatt hours calculator

Gram calories to Gigawatt hours Conversion Table

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• Gigawatt hour (3,600,000,000,000 J)

  The gigawatt hour (symbol GWh) is a unit of energy equal to 3,600,000 megajoules. If energy is transmitted or used at a constant rate (power) over a period of time, the total energy in gigawatt hours is equal to the power in gigawatt multiplied by the time in hours.

• Gram calorie (4.19 J)

  A calorie is a unit of energy. Various definitions exist but fall into two broad categories. The first, the small calorie, or gram calorie (symbol: cal), is defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius at a pressure of one atmosphere. The second, the large calorie or kilogram calorie (symbols: Cal, kcal), also known as the food calorie and similar names, is defined in terms of the kilogram rather than the gram. It is equal to 1000 small calories or 1 kilocalorie (symbol: kcal). The amount of energy required to warm one gram of air-free water from 14.5 to 15.5 °C at standard atmospheric pressure. Experimental values of this calorie ranged from 4.1852 to 4.1858 J. The CIPM in 1950 published a mean experimental value of 4.1855 J, noting an uncertainty of 0.0005 J.