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Calorie thermochemical to BTU international table

Convert calorie thermochemical (cal th) to BTU international table (BTU IT) with adjustable precision, a worked example and a reference table.

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Converters workspace● Runs in your browser
01 Your input
02 Your result
YOUR RESULT
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Conversion formula(value × 4.184 + 0 − 0) ÷ 1055.05585262

Reference table

cal thBTU IT
10.00396566683139
50.019828334157
100.0396566683139
250.0991416707848
500.19828334157
1000.396566683139

How the conversion works

The input is converted into J using the source factor and offset, then into BTU international table. This keeps unit definitions consistent across the energy collection.

Definitions and sources

Factors are maintained in the versioned unit dataset. Output is rounded to your selected significant digits; calculation uses JavaScript double precision.

How to use this tool

  1. Enter a finite numeric value in calorie thermochemical.
  2. Choose the significant digits for your result.
  3. Copy or download the result, including its formula.

Try this example

10

Accuracy and scope

Calorie and BTU conventions are explicitly distinguished. Electronvolt uses the exact post-2019 SI elementary charge.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.