diff --git a/fhem/CHANGED b/fhem/CHANGED
index fc6a2c006..dfb278068 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+  - bugfix:  12_HProtocolGateway: Filllevel conversion corrected
   - bugfix:  57_Calendar.pm: make ical file work again
   - change:  34_ESPEasy: get/set cmd handling rewritten, more supported ESP
              Easy cmds, user defined cmds/mappings, nfx plugin handling
diff --git a/fhem/FHEM/12_HProtocolGateway.pm b/fhem/FHEM/12_HProtocolGateway.pm
index 00ede98f4..99541c486 100644
--- a/fhem/FHEM/12_HProtocolGateway.pm
+++ b/fhem/FHEM/12_HProtocolGateway.pm
@@ -363,7 +363,7 @@ sub HProtocolGateway_Tank($$$) {
   }
   close $fh;
 
-  my $messwert = $filllevel/10;
+  my $messwert = $filllevel/100;
   my $volume = 0;
 
   foreach my $level (sort keys %TankChartHash) {