I have just downloaded the sample version for evaluation and I cannot find a way of using metric values. Can someone please let me know if it is possible to use metric units??
This is the general stormwater forum. What program are you referring to?
If this is about the HydroCAD Sampler, please see the Settings|Units screen. This will let you select English, Metric, or custom units at any time. You can also select mixed units such as input in Metric and output in English.