diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index f1002d86f80..a97b553aed4 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4559,12 +4559,16 @@ abstract class CommonObject
 					{
 						$out .= '<tr '.$class.$csstyle.' class="'.$this->element.'_extras_'.$key.'">';
 					}
-					// Convert date into timestamp format
+					// Convert date into timestamp format (value in memory must be a timestamp)
 					if (in_array($extrafields->attribute_type[$key],array('date','datetime')))
 					{
 						$value = isset($_POST["options_".$key])?dol_mktime($_POST["options_".$key."hour"], $_POST["options_".$key."min"], 0, $_POST["options_".$key."month"], $_POST["options_".$key."day"], $_POST["options_".$key."year"]):$this->db->jdate($this->array_options['options_'.$key]);
 					}
-
+					// Convert float submited string into real php numeric (value in memory must be a php numeric)
+					if (in_array($extrafields->attribute_type[$key],array('price','double')))
+					{
+						$value = isset($_POST["options_".$key])?price2num($_POST["options_".$key]):$this->array_options['options_'.$key];
+					}
 					if($extrafields->attribute_required[$key])
 						$label = '<span'.($mode != 'view' ? ' class="fieldrequired"':'').'>'.$label.'</span>';
 
diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index b539a02654f..f6f0006a6d6 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -738,7 +738,7 @@ class ExtraFields
 	 * Return HTML string to put an input field into a page
 	 *
 	 * @param  string  $key            Key of attribute
-	 * @param  string  $value          Preselected value to show (for date type it must be in timestamp format)
+	 * @param  string  $value          Preselected value to show (for date type it must be in timestamp format, for amount or price it must be a php numeric value)
 	 * @param  string  $moreparam      To add more parametes on html input tag
 	 * @param  string  $keyprefix      Prefix string to add into name and id of field (can be used to avoid duplicate names)
 	 * @param  string  $keysuffix      Suffix string to add into name and id of field (can be used to avoid duplicate names)
@@ -861,11 +861,14 @@ class ExtraFields
 		}
 		elseif ($type == 'price')
 		{
-			$out='<input type="text" class="flat '.$showsize.' maxwidthonsmartphone" name="'.$keysuffix.'options_'.$key.$keyprefix.'" value="'.price2num($value).'" '.($moreparam?$moreparam:'').'> '.$langs->getCurrencySymbol($conf->currency);
+			if (!empty($value)) {		// $value in memory is a php numeric, we format it into user number format.
+				$value=price($value);
+			}
+			$out.='<input type="text" class="flat '.$showsize.' maxwidthonsmartphone" name="'.$keysuffix.'options_'.$key.$keyprefix.'" value="'.$value.'" '.($moreparam?$moreparam:'').'> '.$langs->getCurrencySymbol($conf->currency);
 		}
 		elseif ($type == 'double')
 		{
-			if (!empty($value)) {
+			if (!empty($value)) {		// $value in memory is a php numeric, we format it into user number format.
 				$value=price($value);
 			}
 			$out='<input type="text" class="flat '.$showsize.' maxwidthonsmartphone" name="'.$keysuffix.'options_'.$key.$keyprefix.'" value="'.$value.'" '.($moreparam?$moreparam:'').'> ';