# Units

Units of measurement available in CP2K’s input.

## Energy

Possible units of measurement for an energy. The `[energy]` entry acts like a dummy flag (assumes the unit of measurement of energy is in internal units), useful for dimensional analysis.

- `hartree`

- `wavenumber_e`

- `joule`

- `kcalmol`

- `kjmol`

- `Ry`

- `eV`

- `keV`

- `K_e`

- `energy`

## Length

Possible units of measurement for a length. The `[length]` entry acts like a dummy flag (assumes the unit of measurement of length is in internal units), useful for dimensional analysis.

- `bohr`

- `m`

- `pm`

- `nm`

- `angstrom`

- `length`

## Temperature

Possible units of measurement for a temperature. The `[temperature]` entry acts like a dummy flag (assumes the unit of measurement of temperature is in internal units), useful for dimensional analysis.

- `K`

- `au_temp`

- `temperature`

## Pressure

Possible units of measurement for a pressure. The `[pressure]` entry acts like a dummy flag (assumes the unit of measurement of pressure is in internal units), useful for dimensional analysis.

- `bar`

- `atm`

- `kbar`

- `Pa`

- `MPa`

- `GPa`

- `au_p`

- `pressure`

## Angle

Possible units of measurement for an angle. The `[angle]` entry acts like a dummy flag (assumes the unit of measurement of angle is in internal units), useful for dimensional analysis.

- `rad`

- `deg`

- `angle`

## Time

Possible units of measurement for a time. The `[time]` entry acts like a dummy flag (assumes the unit of measurement of time is in internal units), useful for dimensional analysis.

- `s`

- `fs`

- `ps`

- `au_t`

- `wavenumber_t`

- `time`

## Mass

Possible units of measurement for a mass. The `[mass]` entry acts like a dummy flag (assumes the unit of measurement of mass is in internal units), useful for dimensional analysis.

- `kg`

- `amu`

- `m_e`

- `mass`

## Potential

Possible units of measurement for a potential. The `[potential]` entry acts like a dummy flag (assumes the unit of measurement of potential is in internal units), useful for dimensional analysis.

- `volt`

- `au_pot`

- `potential`

## Force

Possible units of measurement for a force. The `[force]` entry acts like a dummy flag (assumes the unit of measurement of force is in internal units), useful for dimensional analysis.

- `N`

- `Newton`

- `mN`

- `mNewton`

- `au_f`

- `force`