Energy conversions
Convert between energy units. Calories, kilojoules, kilowatt-hours and BTU. Each page gives the exact factor and where it comes from, a full table, a worked example, and the reverse conversion.
kcal to kj1 kcal = 4.184 kJkj to kcal1 kJ = 0.239006 kcalcal to j1 cal = 4.184 Jj to cal1 J = 0.239006 calkwh to j1 kWh = 3,600,000 Jkj to cal1 kJ = 239.0057 calbtu to kwh1 BTU = 0.000293071 kWhbtu to j1 BTU = 1,055.0559 Jkj to j1 kJ = 1,000 Jkwh to kcal1 kWh = 860.4207 kcalwh to kwh1 Wh = 0.001 kWhkwh to wh1 kWh = 1,000 Wh