Energy / Btu IT → kcal
Convert International Table Btu to Thermochemical kilocalories
Convert work, heat, and stored energy using joules as the base. Convert International Table Btu (Btu IT) to Thermochemical kilocalories (kcal). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Thermochemical kilocalories to International Table Btu →
How to convert International Table Btu to thermochemical kilocalories
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 kcal.
kcal = Btu IT × 1055.05585262 ÷ 4184
Worked examples
10 Btu IT ≈ 2.52164400722 kcal
Step 1: (10 × 1055.05585262) ≈ 10550.5585262 J.
Step 2: 10550.5585262 ÷ 4184 ≈ 2.52164400722 kcal.20 Btu IT ≈ 5.04328801444 kcal
Step 1: (20 × 1055.05585262) ≈ 21101.1170524 J.
Step 2: 21101.1170524 ÷ 4184 ≈ 5.04328801444 kcal.
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 kilocalories
Thermochemical kilocalories (kcal) measures energy under the conventions above. The base value in J is (x × 4184), where x is the numerical value in kcal. 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 kilocalories reference table
| International Table Btu (Btu IT) | Thermochemical kilocalories (kcal) |
|---|---|
| 1 | 0.252164400722 |
| 5 | 1.26082200361 |
| 10 | 2.52164400722 |
| 25 | 6.30411001804 |
| 50 | 12.6082200361 |
| 100 | 25.2164400722 |
| 1000 | 252.164400722 |
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