Creating Custom Dimension Units

When you create a project, by default Revit assigns specific units and accuracy to dimension styles based on the project units settings.

You can create custom dimension types that override these default settings. For each custom dimension type you create, you can define the unit and accuracy settings. For example, in a project that uses Imperial units, you can create a dimension type that displays a metric unit. You can also create dimension types that have different rounding options so, for example, you can show dimensions that round to 1/8” in a plan view and 1/32” in a detail view.

To create a custom dimension type:

1. Click Annotate tabDimension panel.
2. On the Dimensions panel drop-down, click the appropriate dimension tool. For example, if you want to apply custom accuracy to a linear dimension, click Linear Dimension Types.
3. In the Type Properties dialog, click Duplicate. Enter a name for the new dimension style, and click OK.
4. Under Text, for Units Format, click the value button.
5. In the Format dialog, clear Use project settings.
6. For Units, select an appropriate unit.
7. For Rounding, select an appropriate value. If you select Custom, enter a value for Rounding increment.
8. If applicable, select a Unit symbol.
9. Click OK twice.