While essentially unitless, Local Simulation has been written to follow the mm/kg/J/s standard for units. The user may use an equivalent system of units after ensuring the relations are consistent. A brief list of the primary input and output variables is given with their associated units.
| Angle | ° (degrees) |
| Convection | W/(mm² °C) |
| Density | kg/mm³ |
| Displacement | mm |
| Elastic (Young's) Modulus | N/mm² |
| Hatch spacing | mm |
| Laser absorptivity coefficient | W/W (unitless) |
| Laser radius | mm |
| Laser power | W |
| Latent heat | J/kg |
| Position | mm |
| Specific heat capacity | J/(kg °C) |
| Strain | mm/mm (unitless) |
| Temperature | °C |
| Thermal conductivity | W/(mm °C) |
| Thermal emissivity | W/W (unitless) |
| Thermal expansion coefficient | µm/(µm °C) (or 1/°C) |
| Time | s |
| Velocity | mm/s |
| Yield strength | MPa |