diff --git a/__init__.py b/__init__.py
index 88b5218..4e2285b 100644
--- a/__init__.py
+++ b/__init__.py
@@ -29,6 +29,7 @@ def register():
         inventory.Inventory,
         inventory.CreateInventoriesStart,
         stock.WarehouseKardexStockStart,
+        product.ChangeUdmProductStart,
         module='stock_co', type_='model')
     Pool.register(
         shipment.ShipmentDetailed,
@@ -45,6 +46,7 @@ def register():
         shipment.ShipmentInForceDraft,
         shipment.ShipmentInReturnForceDraft,
         shipment.ShipmentInternalLoadStock,
+        product.ChangeUdmProduct,
         module='stock_co', type_='wizard')
     Pool.register(
         stock.MoveByProduct,
diff --git a/product.py b/product.py
index ead365e..e1d7efd 100644
--- a/product.py
+++ b/product.py
@@ -128,6 +128,75 @@ class AverageCost(ModelSQL, ModelView):
         cls._order.insert(0, ('effective_date', 'DESC'))
 
 
+class ChangeUdmProductStart(ModelView):
+    'Change Udm Product Start'
+
+    __name__ = 'stock_co.change_udm_product.start'
+
+    udm = fields.Many2One('product.uom', "UOM", required=True,
+        help="If change the uom in product, this update the uom in sales, purchases \b \
+            invoices and moves stock")
+
+class ChangeUdmProduct(Wizard):
+    'Change Udm Product'
+
+    __name__ = 'stock_co.change_udm_product'
+
+    start = StateView('stock_co.change_udm_product.start',
+        'stock_co.change_udm_product_view_form', [
+            Button('Cancel', 'end', 'tryton-cancel'),
+            Button('Accept', 'accept', 'tryton-ok', default=True),
+        ])
+    accept = StateTransition()
+
+    def transition_accept(self):
+        pool = Pool()
+        cursor = Transaction().connection.cursor()
+        Template = pool.get('product.template')
+        Sale = pool.get('sale.line')
+        Purchase = pool.get('purchase.line')
+        Invoice = pool.get('account.invoice.line')
+        Move = pool.get('stock.move')
+
+        sale = Sale.__table__()
+        purchase = Purchase.__table__()
+        invoice = Invoice.__table__()
+        move = Move.__table__()
+        template = Template.__table__()
+
+        product_template = Template(Transaction().context.get('active_id'))
+        product_id = product_template.products[0].id
+        uom_update = self.start.udm.id
+        sale_uom = product_template.sale_uom.id
+        purchase_uom = product_template.purchase_uom.id
+        default_uom = product_template.default_uom.id
+
+        cursor.execute(*sale.update(
+                        [sale.unit], [uom_update],
+                        where=(sale.unit == sale_uom) & (sale.product == product_id)))
+        cursor.execute(*purchase.update(
+                        [purchase.unit], [uom_update],
+                        where=(purchase.unit == purchase_uom) & (purchase.product == product_id)))
+        cursor.execute(*invoice.update(
+                        [invoice.unit], [uom_update],
+                        where=(invoice.unit == purchase_uom)
+                        & (invoice.invoice_type == 'in')
+                        & (invoice.product == product_id)))
+        cursor.execute(*invoice.update(
+                        [invoice.unit], [uom_update],
+                        where=(invoice.unit == sale_uom)
+                        & (invoice.invoice_type == 'out')
+                        & (invoice.product == product_id)))
+        cursor.execute(*move.update(
+                        [move.uom], [uom_update],
+                        where=(move.uom == default_uom) & (move.product == product_id)))
+        cursor.execute(*template.update(
+                        [template.default_uom, template.purchase_uom, template.sale_uom],
+                        [uom_update, uom_update, uom_update],
+                        where=(template.id == product_template.id)))
+
+        return 'end'
+
 # class UpdateAverageCosts(Wizard):
 #     'Update Average Costs'
 #     __name__ = 'stock_co.update_average_costs'
diff --git a/product.xml b/product.xml
index bd5d97a..859d180 100644
--- a/product.xml
+++ b/product.xml
@@ -21,6 +21,22 @@ this repository contains the full copyright notices and license terms. -->
             <field name="inherit" ref="product.template_view_form"/>
             <field name="name">template_form</field>
         </record>
+        <record model="ir.ui.view" id="change_udm_product_view_form">
+            <field name="model">stock_co.change_udm_product.start</field>
+            <field name="type">form</field>
+            <field name="name">change_udm_product_form</field>
+        </record>
+        <record model="ir.action.wizard" id="wizard_change_udm_product">
+            <field name="name">Change UDM product</field>
+            <field name="wiz_name">stock_co.change_udm_product</field>
+            <field name="model">product.template</field>
+        </record>
+        <record model="ir.action.keyword" id="change_udm_product_keyword">
+            <field name="keyword">form_action</field>
+            <field name="model">product.template,-1</field>
+            <field name="action" ref="wizard_change_udm_product"/>
+        </record>
+
 
     </data>
 </tryton>
diff --git a/view/change_udm_product_form.xml b/view/change_udm_product_form.xml
new file mode 100644
index 0000000..a337a91
--- /dev/null
+++ b/view/change_udm_product_form.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<form>
+    <label name="udm"/>
+    <field name="udm"/>
+</form>
\ No newline at end of file