Continue to Site

Welcome to MCAD Central

Join our MCAD Central community forums, the largest resource for MCAD (Mechanical Computer-Aided Design) professionals, including files, forums, jobs, articles, calendar, and more.

Round off the Dim Values


New member

Anybody can guide me regarding this, let me brief my problem,

In the drawing of a part modelwhich is modelled in the unit

set as inch & the drawing is made as setting mm as primary units & inches in the secondary.As Primary[secondary]

if suppose there is a Dim.



While actually the dims in inches is 5.532-5.606 when the Dual decimal places is changed to 3 ( previously it was 2) now if suppose i again changes it to 2 it gives 5.54-5.60 & the observation is it has rounded off the 5.532 to 5.54 & 5.606 is not changed to 5.61, I wanted to know Why?

Can it be done because I want the dim as



Same thing I also observed while setting up the Geom tolerances.

Thanks In Advance,


Not sure if you are still interested, but I would like to direct you to a thread on the forum that will help you determine the correct number of significant figures to display:

Aeronautic Engineers > Activities > Aeronautic engineering other topics Forum

Thread: Help Plz! Rouding off confusion?

Please note that there was some confusion over this topic, but poster CoryPad is correct.

Sorry I am not addressing the specifics of the issue in Pro/E. I hope you find this information valuable regardless.

Best regards,

Matthew Ian Loew
Pro/E truncates secondary dimensions, rather than rounding them...

This means that conversions sometimes don't appear to come out correctly.

(It's meant to make the primary dimension the main driver, but I know it's a real pain...)

One possibility is to change the primary dimension slightly, for example:

(primary show 1 dp, secondary show 2 dp)

0.500mm >> 0.5mm

0.019685 inch >> 0.01 inch

Workaround - set primary to 0.51mm, show 1 dec pl:

0.510mm >> 0.5mm

0.020078 inch >> 0.02 inch


Articles From 3DCAD World