R12 UOM Conversion of units using Function

Get the Conversion rate from below function easily.

FUNCTION inv_um_convert (p_item_id IN NUMBER,
                          p_from_uom_code IN VARCHAR2,
                          p_to_uom_code IN VARCHAR2) RETURN NUMBER; 

select msi.segment1,
        msi.primary_uom_code,
        ‘Kg’ as second_uom,
        inv_convert.inv_um_convert (msi.inventory_item_id, ‘kg’
                                   msi.primary_uom_code) as coefficient from mtl_system_items_b
where msi.segment1 = ‘OEAG01-ITEM’;