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Joules to BTU Converter

1 J = 0.0009478171203 BTU. Type any value to convert joules to BTU.

1 J = 0.0009478171203 BTU

Formula: BTU = J ÷ 1,055.055853

Common values
Decimals
In every unit 12 units
Joule (J) 1 J
Kilojoule (kJ) 0.001 kJ
Megajoule (MJ) 0.000001 MJ
Calorie (cal) 0.2390057361 cal
Kilocalorie (kcal) 0.0002390057361 kcal
Watt-hour (Wh) 0.0002777777778 Wh
Kilowatt-hour (kWh) 2.777777778 × 10⁻⁷ kWh
Electronvolt (eV) 6.241509074 × 10¹⁸ eV
British thermal unit (BTU) 0.0009478171203 BTU
Therm (thm) 9.48043428 × 10⁻⁹ thm
Foot-pound (ft·lbf) 0.7375621493 ft·lbf
Erg (erg) 10,000,000 erg

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If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

Joules to BTU table

Formula: BTU = J ÷ 1,055.055853

Joule (J)British thermal unit (BTU)
0.1 J0.00009478171203 BTU
0.25 J0.0002369542801 BTU
0.5 J0.0004739085602 BTU
1 J0.0009478171203 BTU
2 J0.001895634241 BTU
3 J0.002843451361 BTU
4 J0.003791268481 BTU
5 J0.004739085602 BTU
6 J0.005686902722 BTU
7 J0.006634719842 BTU
8 J0.007582536963 BTU
9 J0.008530354083 BTU
10 J0.009478171203 BTU
12 J0.01137380544 BTU
15 J0.0142172568 BTU
20 J0.01895634241 BTU
25 J0.02369542801 BTU
30 J0.02843451361 BTU
40 J0.03791268481 BTU
50 J0.04739085602 BTU
60 J0.05686902722 BTU
75 J0.07108628402 BTU
100 J0.09478171203 BTU
150 J0.142172568 BTU
200 J0.1895634241 BTU
250 J0.2369542801 BTU
500 J0.4739085602 BTU
1,000 J0.9478171203 BTU

How to use: Joules to BTU

  1. 1 Type the value in joules.
  2. 2 The result in BTU appears at once – or type in the BTU field to convert back.
  3. 3 Pick a common value, round to fewer decimals or swap the units with one click.
  4. 4 Copy the result, or open “In every unit” to see the value in all units of energy.

About this tool

Joule (J) is a unit of energy (SI). British thermal unit (BTU) is a unit of energy (imperial and US customary); 1 BTU = 1,055.055853 J.

To convert joules to BTU, divide the value by 1,055.055853 (BTU = J ÷ 1,055.055853). Example: 100 J = 0.09478171203 BTU.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

How do I convert joules to BTU?

To convert joules to BTU, divide the value by 1,055.055853: BTU = J ÷ 1,055.055853. For example 100 J = 0.09478171203 BTU.

What is 1 J in BTU?

1 J = 0.0009478171203 BTU. The other way round, 1 BTU = 1,055.055853 J.

How exact is the result?

The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.

Can I convert other units of energy here?

Yes – choose any of the 12 units of energy in the From and To lists, or switch to another measurement at the top.

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