1. 只進行單位轉換，保證實際長度一致.(When you just want to convert the Unit but keep the same length.)

a. Start->Program->Unigraphics V1x.0->UG Command Prompt
b. Cd d:\ugs150(eds140)\ugii
c. Ug_convert_part -in (-mm) name.prt
2. 進行單位轉換，保證數值一致，實際長度放大或縮小.(When you make a mistake unit,
So you want to convert the Unit but hope keep the same parameter value. )

a. 啟動 UG, 打開UG part 文件，進入Modeling.
b. Toolbox->Expression->export 產生 name.exp 文件.
c. Start->Program->Unigraphics V1x.0->UG Command Prompt
d. Cd d:\ugs150(eds140)\ugii
e. Ug_convert_part -in (-mm) name.prt
f. Close UG part 文件, 重新打開 UG part 文件。進入Modeling.
g. Toolbox->Expression->Import with option(Replace Existing).