diff --git a/sao/src/common.js b/sao/src/common.js
index e2a098bafa..c6881719f6 100644
--- a/sao/src/common.js
+++ b/sao/src/common.js
@@ -2125,8 +2125,7 @@
                     return '';
                 }
                 var digit = 0;
-                var factor = Number(field.factor || 1);
-                var string = String(value * factor);
+                var string = String(value);
                 if (string.contains('e')) {
                     var exp = string.split('e')[1];
                     string = string.split('e')[0];
@@ -2135,6 +2134,8 @@
                 if (string.contains('.')) {
                     digit += string.replace(/0+$/, '').split('.')[1].length;
                 }
+                var factor = Number(field.factor || 1);
+                digit -= Math.round(Math.log10(factor));
                 return (value * factor).toFixed(digit);
             };
             var format_selection = function() {
diff --git a/tryton/tryton/common/domain_parser.py b/tryton/tryton/common/domain_parser.py
index 9b74d7c354..3252563d2b 100644
--- a/tryton/tryton/common/domain_parser.py
+++ b/tryton/tryton/common/domain_parser.py
@@ -5,6 +5,7 @@ import decimal
 import gettext
 import io
 import locale
+import math
 from collections import OrderedDict
 from decimal import Decimal
 from shlex import shlex
@@ -336,17 +337,18 @@ def format_value(field, value, target=None, context=None, _quote_empty=False):
                     or isinstance(value, bool))):
             return ''
         digit = 0
-        if isinstance(value, Decimal):
-            cast = Decimal
-        else:
-            cast = float
-        factor = cast(field.get('factor', 1))
-        string_ = str(value * factor)
+        string_ = str(value)
         if 'e' in string_:
             string_, exp = string_.split('e')
             digit -= int(exp)
         if '.' in string_:
             digit += len(string_.rstrip('0').split('.')[1])
+        if isinstance(value, Decimal):
+            cast = Decimal
+        else:
+            cast = float
+        factor = cast(field.get('factor', 1))
+        digit -= round(math.log10(factor))
         return locale.localize(
             '{0:.{1}f}'.format(value * factor or 0, digit), True)