There are no explicit attributes describing units in CPACS. The general convention is that all values must be given in the following SI-units:
| [m] | Position, Distance |
| [m2] | Area |
| [m3] | Volume |
| [kg] | Mass |
| [s] | Time |
| [K] | Temperature |
or in derived units, e.g.:
| [N] | Force |
| [Nm] | Moment |
| [W] | Power |
| [J] | Energy |
The only non SI unit used throughout CPACS is the angle in degrees [°]. For the sake of an intuitive use the angles are given in degrees rather than in radian [rad].
| [°] | Angle |