Index: /mods/wpsg_mod_fuellmenge.class.php
===================================================================
--- /mods/wpsg_mod_fuellmenge.class.php	(revision 7654)
+++ /mods/wpsg_mod_fuellmenge.class.php	(revision 7655)
@@ -295,8 +295,9 @@
 			}
 			
-			if ($conversionvalue <= 0) $conversionvalue = 1;
-						
+			if ($conversionvalue <= 0 || $feinheit === $referenceunit) $conversionvalue = 1;
+					
 			// Umrechnung
-			$fmenge_reference = ($fmenge * $referencevalue) / $conversionvalue;
+			if ($conversionvalue !== 1) $fmenge_reference = ($fmenge * $referencevalue) / $conversionvalue;
+			else $fmenge_reference = $fmenge;
 			
 			if ($fmenge_reference <= 0) $reference_price = 0;