How to change the units in BOM????

I know its a very dumb question, but I have to ask this one because somehow I unable to get this one.

How can we change the units of length and weight in a BOM???

For example in the given pic the length unit is in 'mm' and weight is in 'gram' how can I change it to any other unit like metre and kilogram or any other one???

Best Regards,

Yash

SolidworksBill Of Materials