⚡ Energy converter

Kilojoule to BTU Converter

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

kJ

Results

Btu
0.947817120313 BTU
Same value in every unit

📊 Kilojoule to BTU chart

Kilojoule to BTU — plotted against kilojoule (kj).

How to convert kilojoules to BTU

To convert kilojoules to BTU, multiply by 0.947817120313. Energy conversions connect nutrition, electricity bills, heating systems and physics.

BTU = kJ × 0.947817120313 kJ = BTU ÷ 0.947817120313
Kilojoule to BTU conversion – kJ to BTU formula illustration
Kilojoule (kJ) → BTU (BTU) at a glance.

Kilojoule to BTU conversion table

Kilojoule (kJ)BTU (BTU)
0.1 kJ0.0947817120313 BTU
0.5 kJ0.473908560157 BTU
1 kJ0.947817120313 BTU
2 kJ1.89563424063 BTU
3 kJ2.84345136094 BTU
4 kJ3.79126848125 BTU
5 kJ4.73908560157 BTU
10 kJ9.47817120313 BTU
20 kJ18.9563424063 BTU
25 kJ23.6954280078 BTU
50 kJ47.3908560157 BTU
100 kJ94.7817120313 BTU
500 kJ473.908560157 BTU
1,000 kJ947.817120313 BTU

About the units

Kilojoule (kJ)

A kilojoule is 1,000 joules and appears on food labels in many countries.

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 kilojoules (kJ) 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 kilojoules.

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 kilojoule?

One kilojoule equals 0.947817120313 BTU. 0.947817120313 is the exact factor used by this converter.

How do I convert kilojoules to BTU?

Multiply the value in kilojoules by 0.947817120313. To go the other way, multiply BTU by 1.05505585262.

What is 10 kJ in BTU?

10 kJ = 9.47817120313 BTU. Also, 5 kJ = 4.73908560157 BTU and 100 kJ = 94.7817120313 BTU.

What is the difference between a kilojoule and a btu?

A kilojoule is 1,000 joules and appears on food labels in many countries. 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 Kilojoule 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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