Conversion lab / energy

BTU to Kilojoules Converter

Convert International Table British thermal units to kilojoules.

BTU to Kilojoules Converter: 1 BTU (IT) = 1.05505585 kilojoules. To convert any amount, multiply the number of BTU (IT) by 1.05505585. TOEA calculates with the full stored factor (BTU × 1.05505585262 = kJ) and keeps the calculation in your browser. Runs 100% locally in your browser with zero server file uploads.

Category
Unit converters
Runs
In your browser
Cost
Free · no sign-up
Availability
Ready to use
TOEA / CONVERSION ENGINE 01Browser only
Input / energy
BTU

Decimals, zero, and negative values are supported.

Reverse direction
Result / live

1.05505585

kJkilojoules
Working formula

BTU × 1.05505585262 = kJ

One BTU (IT) equals 1.05505585262 kilojoules.
Common values
1 BTU1.05505585 kJ
10 BTU10.55055853 kJ
100 BTU105.50558526 kJ
1,000 BTU1,055.05585262 kJ
10,000 BTU10,550.5585262 kJ

BTU (IT) to kilojoules conversion table

BTU (IT) (BTU)kilojoules (kJ)
1 BTU1.055056 kJ
10 BTU10.55056 kJ
100 BTU105.5056 kJ
200 BTU211.0112 kJ
300 BTU316.5168 kJ
400 BTU422.0223 kJ
500 BTU527.5279 kJ
600 BTU633.0335 kJ
700 BTU738.5391 kJ
800 BTU844.0447 kJ
900 BTU949.5503 kJ
1,000 BTU1,055.056 kJ
BTU (IT) (BTU)kilojoules (kJ)
1,500 BTU1,582.584 kJ
2,000 BTU2,110.112 kJ
2,500 BTU2,637.64 kJ
3,000 BTU3,165.168 kJ
4,000 BTU4,220.223 kJ
5,000 BTU5,275.279 kJ
7,500 BTU7,912.919 kJ
10,000 BTU10,550.56 kJ
25,000 BTU26,376.4 kJ
50,000 BTU52,752.79 kJ
100,000 BTU105,505.6 kJ

Rounded to seven significant digits; the converter above uses the full factor.

Worked examples

Multiply the number of BTU (IT) by 1.0550558526:

  • 10 BTU × 1.0550558526 = 10.55056 kJ
  • 100 BTU × 1.0550558526 = 105.5056 kJ
  • 1,000 BTU × 1.0550558526 = 1,055.056 kJ

How to use it

  1. Enter the number of BTU (IT) you want to convert.
  2. Read the kilojoules result as it updates.
  3. Copy the result or open the reverse conversion.

Privacy & limitations

Your value never leaves this browser. JavaScript floating-point arithmetic can round the last displayed digit for very large or highly precise values; do not use this general utility where regulated measurement traceability is required.

Related tools

kJ to BTUkWh to MJHP to kW

Frequently asked questions

What formula converts BTU (IT) to kilojoules?

BTU × 1.05505585262 = kJ. The result is displayed with up to 8 decimal places without changing the underlying calculation.

How many kilojoules is 10,000 BTU?

10,000 BTU = 10,550.56 kJ. Multiply 10,000 by 1.05505585 to get it, or find it in the conversion table.

How do I convert kilojoules back to BTU (IT)?

Divide by 1.05505585, or open the reverse converter, which uses the exact reciprocal of the same factor.

Can I enter zero, decimals, or negative values?

Yes. The engine handles finite positive, zero, decimal, and negative numbers. Whether a negative measurement is meaningful depends on your use case.

Is this conversion performed online?

The page is online, but the number you type is converted locally in your browser and is not sent to TOEA.

Embed this tool

Free to use on any website. Paste the code where the tool should appear; the link under it lets readers open the full page.

<iframe src="https://toea.com/embed/btu-to-kj" title="BTU to Kilojoules Converter" width="100%" height="500" style="border:0;max-width:680px" loading="lazy"></iframe>
<p style="margin:4px 0 16px;font-size:13px"><a href="https://toea.com/btu-to-kj">BTU to Kilojoules Converter</a> &middot; TOEA</p>
<script>addEventListener("message",function(e){if(e.origin!=="https://toea.com"||!e.data||e.data.type!=="toea-embed-height")return;document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.height+"px"})})</script>

Free tool · runs in your browser · no account required