Convert between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTU, and foot-pounds.
=
Common Energy Conversions
1 kWh= 3,600,000 J
1 kcal= 4,184 J
1 BTU= 1,055.06 J
1 kWh= 3,412 BTU
1 cal= 4.184 J
FAQ
A kilocalorie (kcal) equals 1,000 calories (cal). The "Calories" listed on food labels are actually kilocalories. So when a food label says 200 Calories, it means 200 kcal or 200,000 cal.
BTU (British Thermal Unit) is the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit. It is commonly used for rating heating and cooling systems (furnaces, air conditioners).