What is the difference between kilocalorie (IT) and calorie (th)?

Kilocalorie (IT) equals 1,000 international-table calories and is defined using 4.1868 joules per calorie, whereas calorie (th) is defined exactly as 4.184 joules for thermochemical consistency.

When should I use this conversion?

Use it when working with older thermodynamic or calorimetric data where these different calorie definitions appear, especially in historical tables or engineering heat calculations.

Why is the joule unit preferred nowadays?

The joule is the SI unit of energy and provides a standardized, reproducible base which reduces confusion between varying calorie definitions used historically.

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

Learn how to convert energy values from kilocalorie (IT) to calorie (th) accurately using this tool. Suitable for thermodynamics, calorimetry, and historical data analysis.

Kilocalorie (IT) [kcal (IT)]

Calorie (th) [cal (th)]

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

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

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

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.

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

Explore More Energy Units Converter

What Is This Tool?

This unit converter translates energy measurements from kilocalorie (IT) to calorie (th), useful for engineering, thermodynamics, and historical data contexts where different calorie definitions apply.

How to Use This Tool?

Enter the value in kilocalorie (IT) you want to convert
Select kilocalorie (IT) as the input unit
Choose calorie (th) as the output unit
Click convert to see the conversion result

Key Features

Converts energy units between kilocalorie (IT) and calorie (th)
Based on exact conversion rates used in thermodynamic and calorimetric calculations
Supports accurate reconciliation of legacy and modern energy data
Easy browser-based interface for quick conversions

Examples

2 kcal (IT) converts to 2001.3384321224 cal (th)
0.5 kcal (IT) converts to 500.3346080306 cal (th)

Common Use Cases

Tabulating enthalpy and heat values in steam and thermodynamic tables
Engineering calculations involving heat transfer and specific heat
Reconciliation of energy values in historical and modern thermochemical data
Reporting energy in legacy literature or nutrition contexts using kilocalorie (IT)

Tips & Best Practices

Use this converter when dealing with older thermochemical and enthalpy data
Verify unit definitions in your data sources before converting
Apply conversions carefully in engineering heat-balance calculations
Prefer SI joules for new measurements and modern data reporting

Limitations

Kilocalorie (IT) and calorie (th) have slight differences in joule equivalence causing minor discrepancies
This conversion mainly applies to legacy data rather than new experimental measurements
Modern practice favors using joules instead of calorie units
Not intended for converting nutritional energy metrics outside specified definitions

Frequently Asked Questions

What is the difference between kilocalorie (IT) and calorie (th)?: Kilocalorie (IT) equals 1,000 international-table calories and is defined using 4.1868 joules per calorie, whereas calorie (th) is defined exactly as 4.184 joules for thermochemical consistency.
When should I use this conversion?: Use it when working with older thermodynamic or calorimetric data where these different calorie definitions appear, especially in historical tables or engineering heat calculations.
Why is the joule unit preferred nowadays?: The joule is the SI unit of energy and provides a standardized, reproducible base which reduces confusion between varying calorie definitions used historically.

Key Terminology

Kilocalorie (IT): A unit of energy equal to 1,000 international-table calories, where one calorie equals 4.1868 joules.
Calorie (th): A thermochemical calorie defined exactly as 4.184 joules used for consistent heat measurement in older data.
Conversion Rate: The factor used to convert between two units of measurement, here 1 kcal (IT) equals approximately 1000.669 cal (th).

Quick Knowledge Check

What does 1 kilocalorie (IT) equal in terms of calorie (th)?

Exactly 1000 calorie (th)

Approximately 1000.669 calorie (th)

4.184 joules

Which unit is defined exactly as 4.184 joules?

kilocalorie (IT)

calorie (th)

joule

Why is converting between kilocalorie (IT) and calorie (th) important?

To reconcile legacy energy data

For measuring nutritional calories

To convert electric power units

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