Energy / cal → Btu IT
Convert Thermochemical calories to International Table Btu
Convert work, heat, and stored energy using joules as the base. Convert Thermochemical calories (cal) to International Table Btu (Btu IT). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: International Table Btu to Thermochemical calories →
How to convert thermochemical calories to International Table Btu
Calories use the thermochemical definition. Btu use the International Table definition. Food Calories are kilocalories, not single calories.
Use x for the value in cal, b for the intermediate value in J, and y for the result in Btu IT.
Btu IT = cal × 4.184 ÷ 1055.05585262
Worked examples
10 cal ≈ 0.0396566683139 Btu IT
Step 1: (10 × 4.184) ≈ 41.84 J.
Step 2: 41.84 ÷ 1055.05585262 ≈ 0.0396566683139 Btu IT.20 cal ≈ 0.0793133366278 Btu IT
Step 1: (20 × 4.184) ≈ 83.68 J.
Step 2: 83.68 ÷ 1055.05585262 ≈ 0.0793133366278 Btu IT.
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 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.
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.
Definitions and sources
Carry the same physical assumptions into subsequent physics calculations.
Thermochemical calories to International Table Btu reference table
| Thermochemical calories (cal) | International Table Btu (Btu IT) |
|---|---|
| 1 | 0.00396566683139 |
| 5 | 0.019828334157 |
| 10 | 0.0396566683139 |
| 25 | 0.0991416707848 |
| 50 | 0.19828334157 |
| 100 | 0.396566683139 |
| 1000 | 3.96566683139 |
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