diff --git a/addons/product/product_view.xml b/addons/product/product_view.xml
index 41a6360020d..2dd1d21b559 100644
--- a/addons/product/product_view.xml
+++ b/addons/product/product_view.xml
@@ -429,8 +429,8 @@
                         </group>
                         <group>
                             <field name="uom_type" on_change="onchange_type(uom_type)"/>
-                            <field name="factor" attrs="{'invisible':[('uom_type','!=','smaller')]}" widget="uom_factor" options="{'category_field': 'category_id', 'name_field': 'name'}"/>
--                            <field name="factor_inv" attrs="{'invisible':[('uom_type','!=','bigger')]}" widget="uom_factor" options="{'category_field': 'category_id', 'name_field': 'name'}"/>
+                            <field name="factor" attrs="{'invisible':[('uom_type','!=','smaller')]}" widget="uom_factor"/>
+-                           <field name="factor_inv" attrs="{'invisible':[('uom_type','!=','bigger')]}" widget="uom_factor"/>
                             <field name="rounding"/>
                         </group>
                     </group>
diff --git a/addons/product/static/src/js/product.js b/addons/product/static/src/js/product.js
index 6cf2efe8da4..0b68f6290df 100644
--- a/addons/product/static/src/js/product.js
+++ b/addons/product/static/src/js/product.js
@@ -4,17 +4,16 @@ instance.web.form.FieldUOMFactor = instance.web.form.FieldFloat.extend({
     template: "FieldUOMFactor",
     init: function() {
         this._super.apply(this, arguments);
-        this.set({"category": false, 'name': false});
-        if (this.options.category_field) {
-            this.field_manager.on("field_changed:" + this.options.category_field, this, function() {
-                this.set({"category": this.field_manager.get_field_value(this.options.category_field)});
-            });
-        }
-        if (this.options.name_field) {
-            this.field_manager.on("field_changed:" + this.options.name_field, this, function() {
-                this.set({"name": this.field_manager.get_field_value(this.options.name_field)});
-            });
-        }
+        this.set({"category": false, 'name': false, 'uom_type': false});
+        this.field_manager.on("field_changed:category_id", this, function() {
+            this.set({"category": this.field_manager.get_field_value("category_id")});
+        });
+        this.field_manager.on("field_changed:name", this, function() {
+            this.set({"name": this.field_manager.get_field_value("name")});
+        });
+        this.field_manager.on("field_changed:uom_type", this, function() {
+            this.set({"uom_type": this.field_manager.get_field_value("uom_type")});
+        });
         this.on("change:category", this, this.get_uom_reference);
         this.get_uom_reference();
         this.ci_dm = new instance.web.DropMisordered();
@@ -23,6 +22,7 @@ instance.web.form.FieldUOMFactor = instance.web.form.FieldFloat.extend({
         var tmp = this._super();
         this.on("change:uom_reference", this, this.reinitialize);
         this.on("change:name", this, this.reinitialize);
+        this.on("change:uom_type", this, this.reinitialize);
         return tmp;
     },
     get_uom_reference: function() {
@@ -39,8 +39,6 @@ instance.web.form.FieldUOMFactor = instance.web.form.FieldFloat.extend({
     parse_value: function(val, def) {
         return instance.web.parse_value(val, {type: "float"}, def);
     },
-    format_value: function(val, def) {
-        return instance.web.format_value(val, {type: "float"}, def);
-    },
+    
 });
 }
diff --git a/addons/product/static/src/xml/product.xml b/addons/product/static/src/xml/product.xml
index 6eab4d9c899..8bfa6ee1b64 100644
--- a/addons/product/static/src/xml/product.xml
+++ b/addons/product/static/src/xml/product.xml
@@ -5,10 +5,17 @@
 <t t-name="FieldUOMFactor" t-extend="FieldChar">
     <t t-jquery="t:first" t-operation="before">
         <t t-if="widget.get('uom_reference')">
-            1 <t t-esc="widget.get('uom_reference').name"/> =
+            <t t-if="widget.get('uom_type') === 'smaller'">
+                1 <t t-esc="widget.get('uom_reference').name"/> =
+            </t>
         </t>
     </t>
     <t t-jquery="t:last" t-operation="after">
+        <t t-if="widget.get('uom_reference')">
+            <t t-if="widget.get('uom_type') === 'bigger'">
+                <t t-esc="widget.get('uom_reference').name"/> = 1 
+            </t>
+        </t>
         <t t-esc="widget.get('name')"/>
     </t>
 </t>