inconsistent units when calulating area

[roscopeco2000]

Hello I have seen this issue come up a lot on forums but I cant get my head round working out an area for a purge calculation. All I want to do is get an area from some lengths but I get the dreaded message. I understand I need to converted the length to a meters squared? I attached family and screen shot.

[bin]

Your Purge Ventilation is a Number Parameter, delete it and create an Area parameter.

[bin]

I was wrong... where is the Purge Ventilation parameter in your family?

[bin]

At first, I thought that you created a number parameter (4.000), then I noticed that the default unit for Area is n.000 as well... 

But if I create an Area Parameter and it works just fine.

[barthbradley · Accepted solution]

Sounds like you need a Neutralizer.    Divide by (/) or Multiply by (*) will generally work. 

Here's some more information on the subject to keep handy: 

https://www.revitforum.org/tutorials-tips-tricks/1138-revit-inconsistent-units-how-neutralize-them.h...

[roscopeco2000]

thanks this fixed it..