Why is the thermochemical calorie different from the international-table calorie?

They have slightly different fixed joule equivalents: the thermochemical calorie equals exactly 4.184 joules, while the international-table calorie equals 4.1868 joules.

Can this tool convert kilocalorie (IT) back to calorie (th)?

This converter specifically provides conversion from calorie (th) to kilocalorie (IT); reverse conversions require using the reciprocal conversion factor.

Is the kilocalorie (IT) an SI unit?

No, kilocalorie (IT) is not part of the International System of Units; joule is the SI standard for energy.

How to Convert from Calorie (th) [cal (th)] to Kilocalorie (IT) [kcal (IT)]?

Convert energy values from thermochemical calories to international-table kilocalories using a precise conversion tool. Understand applications in calorimetry, thermodynamics, and historical data analysis.

Calorie (th) [cal (th)]

Kilocalorie (IT) [kcal (IT)]

Please check your input. It must be a valid numeric value.

Calorie (th) [cal (th)] to Kilocalorie (IT) [kcal (IT)] Conversion Table

Calorie (th) [cal (th)]	Kilocalorie (IT) [kcal (IT)]

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Calorie (th) [cal (th)] to Kilocalorie (IT) [kcal (IT)] Conversion Table
Calorie (th) [cal (th)]	Kilocalorie (IT) [kcal (IT)]

Explore More Energy Units Converter

What Is This Tool?

This unit converter transforms energy measurements from thermochemical calories (cal (th)) to international-table kilocalories (kcal (IT)). It helps translate historical and engineering energy values into units compatible with international thermodynamic standards.

How to Use This Tool?

Enter the amount in calorie (th) [cal (th)] you want to convert.
Select the source unit as calorie (th) and the target unit as kilocalorie (IT).
Initiate the conversion to get the equivalent value in kilocalorie (IT) [kcal (IT)].

Key Features

Converts thermochemical calories (cal (th)) to kilocalories (IT) (kcal (IT)) accurately following defined conversion rates.
Supports analysis of older calorimetry measurements and thermodynamic property tables.
Facilitates energy value translation for engineering, heat-balance, and calorimetry calculations.
Browser-based and easy-to-use interface for quick conversions.

Examples

500 cal (th) converts to 0.4996656 kcal (IT)
1000 cal (th) converts to 0.9993312 kcal (IT)

Common Use Cases

Converting older heat release or absorption data from calorimetry studies.
Translating thermochemical values for engineering heat transfer and enthalpy calculations.
Reviewing historical thermochemical literature with consistent modern units.
Using in nutrition or food energy contexts aligned with international-table calorie standards.
Preparing and interpreting steam tables and thermodynamic property data.

Tips & Best Practices

Double-check unit selection to ensure correct conversion direction.
Use the tool to facilitate comparisons between historical and modern energy data.
Remember the conversion is approximate due to slight differences in calorie definitions.
Complement with joule-based units for SI-compliant scientific calculations.

Limitations

Conversion reflects approximate equivalence due to differing definitions of the thermochemical and international-table calories (4.184 J vs. 4.1868 J).
Kilocalorie (IT) is not an SI unit; joules might offer better standardization in scientific contexts.
Minor discrepancies can appear in very precise heat and enthalpy measurements.

Frequently Asked Questions

Why is the thermochemical calorie different from the international-table calorie?: They have slightly different fixed joule equivalents: the thermochemical calorie equals exactly 4.184 joules, while the international-table calorie equals 4.1868 joules.
Can this tool convert kilocalorie (IT) back to calorie (th)?: This converter specifically provides conversion from calorie (th) to kilocalorie (IT); reverse conversions require using the reciprocal conversion factor.
Is the kilocalorie (IT) an SI unit?: No, kilocalorie (IT) is not part of the International System of Units; joule is the SI standard for energy.

Key Terminology

Calorie (th) [cal (th)]: A unit of energy defined as exactly 4.184 joules used historically in thermochemical data and heat measurements.
Kilocalorie (IT) [kcal (IT)]: A unit of energy equal to 1,000 international-table calories; one international-table calorie equals 4.1868 joules.
Thermochemical calorie: The calorie defined to give a fixed conversion in older thermochemical data, with 4.184 joules per calorie.
International-table calorie: A calorie unit used in some engineering and nutrition contexts, defined as 4.1868 joules.

Quick Knowledge Check

What is the exact joule equivalent of the thermochemical calorie (cal (th))?

4.1868 joules

4.184 joules

4186.8 joules

Which unit is equal to 1,000 international-table calories?

kilocalorie (IT)

calorie (th)

joule

Why might there be minor discrepancies in converting cal (th) to kcal (IT)?

Differences in calorie definitions

Conversion errors in the tool

Using SI units only

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