Convert 21 Joules to BTUs
How much energy is 21 joules? How many BTUs are in 21 joules? 21 J to BTU conversion.
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21 Joules ≈
0.019904157 BTUs
result rounded
Decimal places
Result in Plain English
21 joules is equal to about 0.0199 BTUs.
To a Percentage
21 joules ≈ 1.99% of a BTU.
In Scientific Notation
21 joules
= 2.1 x 101 joules
≈ 1.99042 x 10-2 BTUs
Joules
A joule is the standard unit of energy. On the surface of the Earth, it takes about 9.8 joules to lift a 1 kilogram object by 1 meter.
BTUs
A British thermal unit is the amount of energy required to heat a pound of water by 1 degree Fahrenheit. This can vary slightly depending on the temperature of the water, therefore different estimates for the BTU exist. The International Standards Organization defines a BTU as 1055.056 joules.