What is a kilocalorie (IT)?

It is a unit of energy equal to 1,000 international-table calories, where one calorie is defined as 4.1868 joules.

What does Hartree energy represent?

Hartree energy is the atomic unit of energy used in atomic physics and quantum chemistry, roughly equal to twice the Rydberg energy.

Why convert kilocalorie (IT) to Hartree energy?

This conversion connects classical thermodynamic energy units with the atomic-scale units used in quantum chemistry and atomic physics studies.

How to Convert from Kilocalorie (IT) [kcal (IT)] to Hartree Energy

Learn to convert energy values from kilocalorie (IT) to Hartree energy effectively using our detailed guide and examples, bridging thermodynamics and quantum chemistry units.

Kilocalorie (IT) [kcal (IT)]

Hartree energy

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

Kilocalorie (IT) [kcal (IT)] to Hartree energy Conversion Table

Kilocalorie (IT) [kcal (IT)]	Hartree energy

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 Hartree energy Conversion Table
Kilocalorie (IT) [kcal (IT)]	Hartree energy

Explore More Energy Units Converter

What Is This Tool?

This online converter allows you to transform energy measurements from kilocalorie (IT), a unit often used in thermodynamics and older literature, into Hartree energy, the atomic energy unit prevalent in quantum chemistry and atomic physics.

How to Use This Tool?

Enter the energy value in kilocalorie (IT) you want to convert.
Select kilocalorie (IT) as the source unit and Hartree energy as the target unit.
Click the convert button to get the equivalent energy in Hartree units.
Review example conversions to understand the scale and application.
Use the results to compare thermodynamic data with quantum chemical calculations.

Key Features

Converts energy from kilocalorie (IT) to Hartree energy seamlessly.
Includes definitions and context for both units to aid understanding.
Provides example conversions for practical reference.
Bridges macroscopic thermal energy units with atomic-scale quantum units.
Supports applications in physical and quantum chemistry, materials science, and computational research.

Examples

2 kcal (IT) converts to approximately 1.92066138131556 × 10²¹ Hartree energy.
0.5 kcal (IT) converts to approximately 4.8016534532889 × 10²⁰ Hartree energy.

Common Use Cases

Tabulating enthalpy and heat values in steam tables and thermodynamic property tables.
Performing heat-balance and calorimetry calculations in engineering.
Reporting energy values from classical thermodynamics in quantum chemical units.
Analyzing total electronic energies in quantum chemistry studies.
Simplifying equations in electronic-structure codes by employing atomic units.

Tips & Best Practices

Verify the unit definitions before conversion due to varying calorie conventions.
Be mindful of very large numerical outputs when converting to Hartree energy.
Use conversions to connect macroscopic thermal data with atomic-scale calculations.
Double-check context when using kilocalorie (IT) as it is less common than Joules today.
Consult literature carefully to match unit conventions in thermodynamic and quantum studies.

Limitations

Hartree energy units are extremely small, leading to very large numerical results hard to manage.
Conversion accuracy may be impacted by precision and numerical representation limitations.
Kilocalorie (IT) is less frequently used in modern settings, requiring confirmation of unit conventions.
Large scale difference between units can complicate some computational comparisons.

Frequently Asked Questions

What is a kilocalorie (IT)?: It is a unit of energy equal to 1,000 international-table calories, where one calorie is defined as 4.1868 joules.
What does Hartree energy represent?: Hartree energy is the atomic unit of energy used in atomic physics and quantum chemistry, roughly equal to twice the Rydberg energy.
Why convert kilocalorie (IT) to Hartree energy?: This conversion connects classical thermodynamic energy units with the atomic-scale units used in quantum chemistry and atomic physics studies.

Key Terminology

Kilocalorie (IT): A unit of energy equal to 1,000 international-table calories; one calorie equals 4.1868 joules.
Hartree Energy: The atomic unit of energy used in quantum chemistry and atomic physics, approximately equal to 4.3597447222071×10⁻¹⁸ joule.
Conversion Rate: The numerical factor used to convert kilocalorie (IT) values to Hartree energy units.

Quick Knowledge Check

What is the definition basis for the kilocalorie (IT)?

One kilocalorie equals 100 calories (thermochemical)

One international-table calorie equals 4.1868 joules

One kilocalorie equals 1 joule

Hartree energy is primarily used in which fields?

Nutrition and food science

Atomic physics and quantum chemistry

Classical thermodynamics

What is a common limitation when converting kilocalorie (IT) to Hartree energy?

Units are roughly the same size, causing confusion

Very large numerical values due to atomic scale

Kilocalorie (IT) is newer and less defined

Share Us

Similar Calculators

Online Acceleration Angular Units Converter Online Magnetic Flux Density Units Converter Online Electric Resistivity Units Converter Online Linear Charge Density Units Converter Online Radiation Exposure Units Converter