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Btu international table to calorie international table

Convert BTU international table (BTU IT) to calorie international table (cal 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
Ready when you are
Conversion formula(value × 1055.05585262 + 0 − 0) ÷ 4.1868

Reference table

BTU ITcal IT
1251.995761111
51259.97880556
102519.95761111
256299.89402778
5012599.7880556
10025199.5761111

How the conversion works

The input is converted into J using the source factor and offset, then into calorie 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 BTU international table.
  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.