AutoCAD Civil 3D General

New Member
Posts: 2
Registered: ‎05-07-2010
Message 1 of 3 (424 Views)

Volume report error?

424 Views, 2 Replies
08-09-2011 06:14 AM

Hi everyone, My Name is Marcelo, Im from Argentina.


I have a problem  with cut/fill volume calculations.(between the difference of  the  volume report and the calculation by hand)

so I  followed the Exercise 3: Generating a Volume Report - earthworks-2.dwg , from the help directory  (civil 3d 2011).

and I  found differences there too, I think that some volume sections are not right,(ie 6+50, 6+75 to 8+50,etc), or I´m missing something.?

An station exaple:

Area st 6+25= 2513.96
Area st 6+50 = 2560.24

cut/fill factor =1

the exaple is using the  Averange end area formula

Volume = (A1+A2)/2) *L 


L= [6+50] - [6+25] =25 foot

Volume =(2513.96+2560.24)/2 )* 25 = 63427.5 cubic foot

to cubic yard (as the report)

Volume * 0.037037037 = 2349.17 cubic yard.

But the report shown 2479.06 cubic yard

Same with other stations, and metrics. What Im doing wrong? I missing something?

I tried this in civil 3d 2011service pack2 on a W7 64bits.

thanks in advance.



*Expert Elite*
Posts: 1,610
Registered: ‎09-05-2006
Message 2 of 3 (419 Views)

Re: Volume report error?

08-09-2011 06:39 AM in reply to: kx99_2010

You have used the AVERAGE END METHOD  to calculate your quantity.


Perhaps the computer is using the PRISMOIDAL METHOD.  I believe you have a choice.





New Member
Posts: 2
Registered: ‎05-07-2010
Message 3 of 3 (388 Views)

Re: Volume report error?

08-11-2011 11:30 AM in reply to: wfberry


Thanks for answering! I really appreciate you taking  time to answer my question.

I checked that, when I select  the average end area method the calculations are wrong (as I describe above), but  with prismodial method  the calculations are ok.




You are not logged in.

Log into access your profile, ask and answer questions, share ideas and more. Haven't signed up yet? Register

Welcome to the new Autodesk Community!
If this is your first visit, click here to get started and make the most of the Community. Let us know what you think of the new experience in the Community Feedback Forum.

Need installation help?

Start with some of our most frequented solutions to get help installing your software.

Ask the Community

Civil 3D Exchange Apps

Created by the community for the community, Autodesk Exchange Apps for AutoCAD Civil 3D helps you achieve greater speed, accuracy, and automation from concept to manufacturing.

Connect with Civil 3D