When entering in parameter values, you can specify different units to what the project is globally set to.
Looking at this example image, the roof’s default units for the Slope is in decimal degrees.
But, a different unit such as rise over run can also be entered into the value instead.
After this value is applied it will then default the units back to decimal degrees again.
This technique can be applied to other values. If you are working in metric, you could enter the value in feet and inches instead.