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Btu international table to calorie thermochemical

Convert BTU international table (BTU IT) to calorie thermochemical (cal th) 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) ÷ 4.184

Reference table

BTU ITcal th
1252.164400722
51260.82200361
102521.64400722
256304.11001804
5012608.2200361
10025216.4400722

How the conversion works

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