What is the Hartree energy?

The Hartree energy is E_h = 4.3597447222071e-18 J (uncertainty ±8.5e-30), equal to 27.211386245988 eV. It is the atomic unit of energy.

Key facts

Frequently asked questions

What is the value of the Hartree energy?

E_h = 4.3597447222071e-18 J, or 27.211386245988 eV, the atomic unit of energy.

How does the Hartree relate to the Rydberg?

One Hartree equals exactly two Rydberg energies: E_h = 2·Ry.

Where is the Hartree energy used?

In quantum chemistry and atomic physics as the natural energy scale of electronic structure.

Related pages

• Speed of light
• Planck constant
• Reduced Planck constant
• Avogadro constant
• Boltzmann constant
• Molar gas constant
• Elementary charge
• Gravitational constant

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