How to convert kilojoules to british thermal units
To convert a measurement in kilojoules to british thermal units, multiply the value by 0.947817120313. The conversion factor comes from the relationship between both units and the joule.
For example, to convert 5 kJ to british thermal units: 5 × 0.947817120313 = 4.739086 BTU.
What is a kilojoule?
A kilojoule equals 1,000 joules and is the standard metric unit for expressing food energy on nutrition labels in most of the world. As metric countries adopted SI units for food labeling, the kilojoule replaced the food calorie on packaging in regions such as Australia, New Zealand, and the European Union (shown alongside kcal).
Common uses of kilojoules include: Food energy on nutrition labels; Dietary and exercise energy tracking; Chemical reaction energy (enthalpy); Battery and mechanical energy specs.
What is a british thermal unit?
A British thermal unit (BTU) is the energy needed to raise the temperature of one pound of water by one degree Fahrenheit, about 1,055 joules. The BTU arose from imperial heating and steam engineering. It remains the dominant unit for heating, ventilation, and air-conditioning capacity in the United States, where furnaces and air conditioners are rated in BTU.
Common uses of british thermal units include: Air conditioner and furnace ratings; Heating and cooling load calculations; Natural gas and fuel energy content; HVAC system sizing in the US.
Kilojoules to british thermal units worked examples
Here are some common values converted:
1 kJ = 0.947817120313 BTU 5 kJ = 4.739086 BTU 10 kJ = 9.478171 BTU 50 kJ = 47.390856 BTU 100 kJ = 94.781712 BTU
Frequently asked questions
How many british thermal units are in one kilojoule?
One kilojoule (kJ) equals 0.947817120313 british thermal units (BTU). Multiply any value in kilojoules by 0.947817120313 to convert to british thermal units.
How do I convert kilojoules to british thermal units?
Multiply the value in kilojoules by 0.947817120313. For example, 5 kJ × 0.947817120313 = 4.739086 BTU.
How do I convert british thermal units to kilojoules?
Multiply the value in british thermal units by 1.055056, or divide by 0.947817120313. Use the swap button on the converter above to reverse the direction.
Is the kilojoule to british thermal unit conversion exact?
The thermochemical calorie is defined as exactly 4.184 J and the BTU as 1055.056 J. Conversions between SI energy units are exact.
What is the formula for kilojoules to british thermal units?
The formula is: BTU = kJ × 0.947817120313. This comes from the definition of both units relative to the joule.