Преобразование количества из одной единицы измерения в другую

Используем ФМ MATERIAL_CONVERT_QUANTITY или MD_CONVERT_MATERIAL_UNIT.

  CALL FUNCTION 'MATERIAL_CONVERT_QUANTITY'
    EXPORTING
      pi_material_src          = uv_matnr
      pi_meinh_src             = uv_unit_from
*     pi_meins_src             =
      pi_quantity_src          = uv_quant_from
      pi_material_dst          = uv_matnr
      pi_meinh_dst             = uv_unit_to
*     pi_meins_dst             =
    IMPORTING
      pe_quantity_dst          = cv_quant_to
*     pe_meinh_dst             =
*     pe_meins_dst             =
    EXCEPTIONS
      wrong_call               = 1
      material_not_found       = 2
      no_conversion            = 3
      OTHERS                   = 4.

или

  CALL FUNCTION 'MD_CONVERT_MATERIAL_UNIT'
    EXPORTING
      i_matnr                  = uv_matnr
      i_in_me                  = uv_unit_from
      i_out_me                 = uv_unit_to
      i_menge                  = uv_quant_from
    IMPORTING
      e_menge                  = cv_quant_to
    EXCEPTIONS
      error_in_application     = 1
      error                    = 2
      OTHERS                   = 3.