diff --git a/CHANGELOG b/CHANGELOG
index 5a0e011e39..018a0ba656 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Add factor on number fields
 * Add calendar view
 * Remove request
 
diff --git a/doc/topics/views/index.rst b/doc/topics/views/index.rst
index 424c5328f0..7e2f73f9a5 100644
--- a/doc/topics/views/index.rst
+++ b/doc/topics/views/index.rst
@@ -133,6 +133,14 @@ List of attributes shared by many form elements:
       :class:`trytond.model.fields.One2Many` to specifiy if the client must
       auto-complete the field. The default value is True.
 
+    .. _common-attributes-factor:
+
+    * ``factor``: A factor to apply on fields
+      :class:`trytond.model.fields.Integer`,
+      :class:`trytond.model.fields.Float` and
+      :class:`trytond.model.fields.Numeric` to display on the widget. The
+      default value is 1.
+
 
 form
 ^^^^
@@ -235,6 +243,8 @@ Display a field of the object with the value of the current record.
 
     * ``completion``: see in common-attributes-completion_.
 
+    * ``factor``: see in common-attributes-factor_.
+
 image
 ^^^^^
 
@@ -491,6 +501,8 @@ field
 
     * ``completion``: see in common-attributes-completion_.
 
+    * ``factor``: see in common-attributes-factor_.
+
 prefix or suffix
 ^^^^^^^^^^^^^^^^
 
diff --git a/trytond/ir/ui/form.rnc b/trytond/ir/ui/form.rnc
index b7cd2ce0f0..81b64fd8f4 100644
--- a/trytond/ir/ui/form.rnc
+++ b/trytond/ir/ui/form.rnc
@@ -104,6 +104,7 @@ attlist.field &= [a:defaultValue = "0"] attribute pre_validate { "0" | "1" }?
 attlist.field &= attribute icon { text }?
 attlist.field &= [a:defaultValue = "1"] attribute completion { "0" | "1" }?
 attlist.field &= attribute string { text }?
+attlist.field &= [a:defaultValue = "1"] attribute factor { text }?
 image = element image { attlist.image, empty }
 attlist.image &= attribute name { text }
 attlist.image &= [ a:defaultValue = "1" ] attribute colspan { text }?
diff --git a/trytond/ir/ui/form.rng b/trytond/ir/ui/form.rng
index 35bfe4ed05..dd0a3186d1 100644
--- a/trytond/ir/ui/form.rng
+++ b/trytond/ir/ui/form.rng
@@ -379,6 +379,11 @@
       <attribute name="string"/>
     </optional>
   </define>
+  <define name="attlist.field" combine="interleave">
+    <optional>
+      <attribute name="factor" a:defaultValue="1"/>
+    </optional>
+  </define>
   <define name="image">
     <element name="image">
       <ref name="attlist.image"/>
diff --git a/trytond/ir/ui/tree.rnc b/trytond/ir/ui/tree.rnc
index e66066dc6c..e422d93099 100644
--- a/trytond/ir/ui/tree.rnc
+++ b/trytond/ir/ui/tree.rnc
@@ -52,6 +52,7 @@ attlist.field &=
 attlist.field &= attribute float_time { text }?
 attlist.field &= [a:defaultValue = "0"] attribute pre_validate { "0" | "1" }?
 attlist.field &= [a:defaultValue = "1"] attribute completion { "0" | "1" }?
+attlist.field &= [a:defaultValue = "1"] attribute factor { text }?
 prefix = element prefix { attlist.affix, empty }
 suffix = element suffix { attlist.affix, empty }
 attlist.affix &= attribute string { text }?
diff --git a/trytond/ir/ui/tree.rng b/trytond/ir/ui/tree.rng
index 5d5b1da9fa..12e9ef3d82 100644
--- a/trytond/ir/ui/tree.rng
+++ b/trytond/ir/ui/tree.rng
@@ -172,6 +172,11 @@
       </attribute>
     </optional>
   </define>
+  <define name="attlist.field" combine="interleave">
+    <optional>
+      <attribute name="factor" a:defaultValue="1"/>
+    </optional>
+  </define>
   <define name="prefix">
     <element name="prefix">
       <ref name="attlist.affix"/>