$1\text{ }joule\text{ }(J) = 1\text{ }watt·sekund = 278·10^{-6}\text{ }watt·timer$
$1\text{ }watt·time\text{ }(Wh) = 3600\text{ }joule$
$1\text{ }kWh = 3,6\text{ }\text{ }MJ$
$1\text{ }calorie\text{ }(cal) = 4,18\text{ }joule$
$1\text{ }kilowatt·time/år\text{ }(kWh/år) = 0,114\text{ }watt$
$1\text{ }kilo\text{ }Joule = 1000\text{ }J$
$1\text{ }Mega\text{ }Joule = 1000\text{ }kJ$
$1\text{ }Giga\text{ }Joule = 1000\text{ }MJ$
$1\text{ }Tera\text{ }Joule = 1000\text{ }GJ$
$1\text{ }Btu\text{ }(British\text{ }thermal\text{ }unit) = 1055,66\text{ }J$
