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CAD tip CAD tip # 8365:

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Q - question

Inventor understands many different measurement units.

A - answer Do you need to make a hole for a 3/4" pipe in your metric model, bend a sheetmetal by 0.1 radians, or chamfer an edge by 5 microns? The Inventor dimension editor supports all standard types of measurement units and converts them automatically as needed.

The default units (for metric environments) are millimeters, but you can set different default units for the current document - e.g. inches - see the ribbon Tools > Options > Document settings > Units.

But Inventor understands many more units. Dimension values in other units can be used in any expression - just add the respective suffix to the value. A special case is the unit "ul" (unitless), which can be used e.g. in multiplication and division expressions (10 mm / 2 ul = 5 mm).

Dimension - units

Inventor understands e.g. these well-known (SI) and less-known measurement units and prefixes - try yourself:


  • m - meter
  • mm - millimeter
  • cm - centimeter
  • dm - decimeter
  • km - kilometer
  • dam - dekameter (1E+1)
  • hm - hektometer (1E+2)
  • Mm - megameter (don't confuse with "mm"!)
  • Gm - gigameter (1E+9)
  • Tm - terrameter (1E+12)
  • Pm - petameter (1E+15)
  • Em - exameter (1E+18)
  • am - attometer (1E-18)
  • fm - femtometer (1E-15)
  • pm - picometer (1E-12)
  • nm - nanometer (1E-9)
  • microm - micrometer (1E-6)
  • micron - micron


  • in - inch
  • ft - foot/feet
  • yd - yard
  • mile - mile
  • cin - centiinch (1E-2)
  • microin - microinch (1E-6)
  • nin - nanoinch (1E-9)
  • pin - picoinch (1E-12)
  • kin - kiloinch (1E+3)
  • Min - megainch (1E+6)
  • Gin - gigainch (1E+9)
  • Gft - gigafoot (1E+9)
  • Gyd - gigayard (1E+9)


  • deg - degree
  • grd - grad (100)
  • rad - radian

Online conveter of other physical units is available on Units converter.

100% *  CAD 
12.12.2011    6492x  
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applies to: Inventor ·

See also:
Tip 10314:How to enter angles in the format degrees-minutes-seconds in Inventor?
Tip 10138:Dimensioning a curve length or distance between two points on a curve.
Tip 10031:Dimension with fixed length of extension lines (fixed dim.line offset)
Tip 9706:Where to set the number of decimal places for Robot output tables?
Tip 9359:Different types of rounding in Inventor parameters.

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