ENERGY CONVERTER
Energy converter
Enter an amount of energy, get it in every unit instantly.
kWh
How many BTU are in a kilowatt-hour?
About 3,412.14 BTU. A kWh is also exactly 3.6 megajoules.
What is a food Calorie?
A kilocalorie — 1,000 calories, or 4.184 kilojoules. Nutrition labels in the US say Calories; elsewhere they often list kJ.
What is a therm?
A unit of natural gas energy, about 100,000 BTU (the US therm is 105.48 megajoules). Gas bills are often in therms.
What is a BTU?
The heat needed to warm one pound of water by one degree Fahrenheit — about 1,055 joules. Furnaces and air conditioners are rated in BTU per hour.
How do I compare electricity and gas prices?
Convert both to the same unit. At a kWh = 3,412 BTU, a therm (about 100,000 BTU) is about 29.3 kWh of heat. The heating cost calculator compares fuels for you.