Autodesk Revit and Text Heights

Recently while producing a Revit template for a customer I had noticed that the fonts in Revit may vary in height and in some instances can be vastly different from your intended height. For example, within AutoCAD, if you choose the font Calibri and set a text height of 3mm then this text will print approximatly 3mm high but in Revit this text would be 2.55mm high. This is due to all fonts being designed differently and having differing ascent and decent heights, this is perfectly normal in word processers and desktop publishing tools. AutoCAD will scale the height of a captial letter to be correct, see the example below.Font Height and varing width

To give some sort of background to this, on a drawing board you may well have used lettering templates for consistent, clear printing or if you were really posh perhaps Letraset! This then became fairly standard and was also expected on Engineering CAD drawings. Before AutoCAD supported True Type Fonts (Pre Release 13) it used Shape Compiled Fonts,(SHX) fonts that closely simulated the lettering templates, see the example below.Technical Letter Guide

To help with this I have created a font height conversion table that you can download here.

Revit text Conversion Heights

The Revit Conversion Factor is a simply multiplied by your intended text height.Revit Font Height Conversion Table

For example, you would like to create a text style for 3mm Calibri which has a Revit Conversion factor of 1.1757, so

3*1.1757=3.5271.

Hope this helps,

LawrenceH

About lawrenceh

I am currently employed by Excitech, one of the largest Autodesk resellers in the UK, to provide training and other services such as implementation and project support to our clients. The main products I get involved with are Autodesk Revit Structure & Autodesk Inventor. My personal interests include aviation, engineering and walking.
This entry was posted in Tips and Tricks and tagged , , , . Bookmark the permalink.

4 Responses to Autodesk Revit and Text Heights

  1. Pingback: Effective text height in Revit | Revit beyond BIM

  2. Chandra says:

    How can I change the conversion factor in Revit? I need to change it for a linked file using shx font mapping.
    Thank you!

  3. Cody Fox says:

    Is this still an issue with more recent versions of Revit?

  4. This is now not a problem in new versions of Revit.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s