⚡ Energy converter

Joule to BTU Converter

Convert joules (J) to BTU (BTU) instantly with the exact formula, a conversion table and chart.

J

Results

Btu
0.000947817120313 BTU
Same value in every unit

📊 Joule to BTU chart

Joule to BTU — plotted against joule (j).

How to convert joules to BTU

To convert joules to BTU, multiply by 0.000947817120313. Energy conversions connect nutrition, electricity bills, heating systems and physics.

BTU = J × 0.000947817120313 J = BTU ÷ 0.000947817120313
Joule to BTU conversion – J to BTU formula illustration
Joule (J) → BTU (BTU) at a glance.

Joule to BTU conversion table

Joule (J)BTU (BTU)
0.1 J0.0000947817120313 BTU
0.5 J0.000473908560157 BTU
1 J0.000947817120313 BTU
2 J0.00189563424063 BTU
3 J0.00284345136094 BTU
4 J0.00379126848125 BTU
5 J0.00473908560157 BTU
10 J0.00947817120313 BTU
20 J0.0189563424063 BTU
25 J0.0236954280078 BTU
50 J0.0473908560157 BTU
100 J0.0947817120313 BTU
500 J0.473908560157 BTU
1,000 J0.947817120313 BTU

About the units

Joule (J)

The joule is the SI unit of energy, the work done by one newton over one meter.

BTU (BTU)

The International Table British thermal unit is about 1,055.06 joules, used for HVAC and heating.

How to use this converter

  1. Type the number of joules (J) in the input box.
  2. The result in BTU appears instantly — no button needed.
  3. See the same value in every other energy unit just below.
  4. Use “Swap units” to convert BTU back to joules.

Tips for better results

  • Double-check which system a unit belongs to (for example US vs UK gallons).
  • Use the swap button to convert in the opposite direction instantly.
  • Bookmark the conversions you use most — each pair has its own page.

Frequently asked questions

How many BTU are in one joule?

One joule equals 0.000947817120313 BTU. 0.000947817120313 is the exact factor used by this converter.

How do I convert joules to BTU?

Multiply the value in joules by 0.000947817120313. To go the other way, multiply BTU by 1,055.05585262.

What is 10 J in BTU?

10 J = 0.00947817120313 BTU. Also, 5 J = 0.00473908560157 BTU and 100 J = 0.0947817120313 BTU.

What is the difference between a joule and a btu?

The joule is the SI unit of energy, the work done by one newton over one meter. The International Table British thermal unit is about 1,055.06 joules, used for HVAC and heating.

Is this tool free and private?

Yes — the Joule to BTU is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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