Kilocalorie per mole is the quotient of a kilocalorie and a mole, mainly used in the United States. It is a derived unit of energy per Avogadro’s number of particles, where energy is measured in units of 1000 (thermochemical) small calories.

In SI units, it is equal to 4.184 kJ/mol, or 6.9477×10⁻²¹ J per molecule. At room temperature (25 °C, 77 °F, or 298.15 K) it is equal to 1.688 k_BT.

Physical quantities measured in kcal·mol^-1 are usually thermodynamical quantities; mostly free energies such as:

• Heat of vaporization
• Heat of fusion
• Ionization energy

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