Energy / Btu IT → cal
Convert International Table Btu to Thermochemical calories
Convert work, heat, and stored energy using joules as the base. Convert International Table Btu (Btu IT) to Thermochemical calories (cal). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Thermochemical calories to International Table Btu →
How to convert International Table Btu to thermochemical calories
Calories use the thermochemical definition. Btu use the International Table definition. Food Calories are kilocalories, not single calories.
Use x for the value in Btu IT, b for the intermediate value in J, and y for the result in cal.
cal = Btu IT × 1055.05585262 ÷ 4.184
Worked examples
10 Btu IT ≈ 2521.64400722 cal
Step 1: (10 × 1055.05585262) ≈ 10550.5585262 J.
Step 2: 10550.5585262 ÷ 4.184 ≈ 2521.64400722 cal.20 Btu IT ≈ 5043.28801444 cal
Step 1: (20 × 1055.05585262) ≈ 21101.1170524 J.
Step 2: 21101.1170524 ÷ 4.184 ≈ 5043.28801444 cal.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About International Table Btu
International Table Btu (Btu IT) measures energy under the conventions above. The base value in J is (x × 1055.05585262), where x is the numerical value in Btu IT. Factors shown here are rounded for display; calculations use the stored factor.
About Thermochemical calories
Thermochemical calories (cal) measures energy under the conventions above. The base value in J is (x × 4.184), where x is the numerical value in cal. Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
International Table Btu to thermochemical calories reference table
| International Table Btu (Btu IT) | Thermochemical calories (cal) |
|---|---|
| 1 | 252.164400722 |
| 5 | 1260.82200361 |
| 10 | 2521.64400722 |
| 25 | 6304.11001804 |
| 50 | 12608.2200361 |
| 100 | 25216.4400722 |
| 1000 | 252164.400722 |
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