BTU to Kilojoule Converter
Convert btu to kilojoules with this free energy converter. The exact relationship used on this page is 1 btu = 1.05505585262 kilojoules. Type any number — the result updates instantly, works on phones and desktops, and is ready to copy into homework, a spec sheet, or a shopping list.
Formula: Kilojoule = BTU × 1.05505585262
How to convert btu to kilojoules
- Enter the value in btu in the converter.
- Read the equivalent amount in kilojoules.
- Use the swap link if you need kilojoule to btu instead.
- Check the table for common values without typing.
Worked examples
- 1 BTU = 1.055055853 kJ
- 5 BTU = 5.275279263 kJ
- 10 BTU = 10.55055853 kJ
- 25 BTU = 26.37639632 kJ
Conversion table
Common btu values converted to kilojoules.
| BTU | kJ |
|---|---|
| 1 | 1.055055853 |
| 2 | 2.110111705 |
| 3 | 3.165167558 |
| 4 | 4.22022341 |
| 5 | 5.275279263 |
| 6 | 6.330335116 |
| 7 | 7.385390968 |
| 8 | 8.440446821 |
| 9 | 9.495502674 |
| 10 | 10.55055853 |
| 20 | 21.10111705 |
| 50 | 52.75279263 |
| 100 | 105.5055853 |
| 250 | 263.7639632 |
| 500 | 527.5279263 |
| 1,000 | 1,055.055853 |
About this conversion
BTU (BTU) and Kilojoule (kJ) are both energy units. Energy converters connect food labels (kcal), electricity bills (kWh), physics (joules), and heating (BTU). Bookmark this URL when you convert btu to kilojoules often, then explore related pairs in the same category if you need a different target unit.
Need the other direction? Open the kilojoule to btu converter.
FAQ
How many kilojoules are in 1 btu?+
1 btu equals 1.05505585262 kilojoules.
What is the formula to convert btu to kilojoules?+
Kilojoule = BTU × 1.05505585262
How do I convert btu to kilojoules by hand?+
Multiply the btu value by 1.05505585262. Example: 10 btu × 1.05505585262 = 10.5505585262 kilojoules.
Is this BTU to kJ converter accurate?+
Yes. Linear conversions use internationally agreed factors relative to SI. Temperature and inverse fuel units use the standard offset or reciprocal formulas, not a guessed scale factor.