diff --git a/sources/getCheckInTable.php b/sources/getCheckInTable.php
index 7bebc26..9984929 100644
--- a/sources/getCheckInTable.php
+++ b/sources/getCheckInTable.php
@@ -263,10 +263,21 @@ foreach ($data_output as $packingjob) {
     }
 }
 
-function getTimeFromSeconds(string $timestring) {
-    $hours = floor($timestring / 3600);
-    $mins  = floor($timestring / 60 % 60);
-    $secs  = floor($timestring % 60);
-    $timeFormat = sprintf('%02d:%02d', $hours, $mins);
-    return $timeFormat;
+function getTimeFromSeconds($seconds): string {
+    if ($seconds === null || $seconds === '') {
+        return '';
+    }
+
+    // robust normalisieren: String/Float -> Float -> gerundet -> Int
+    $seconds = (int) round((float) $seconds);
+
+    if ($seconds < 0) {
+        $seconds = 0; // oder: return ''; je nach gewünschtem Verhalten
+    }
+
+    // reine Integer-Arithmetik, keine impliziten float->int Casts
+    $hours = intdiv($seconds, 3600);
+    $mins  = intdiv($seconds % 3600, 60);
+
+    return sprintf('%02d:%02d', $hours, $mins);
 }
diff --git a/sources/getCheckOutTable.php b/sources/getCheckOutTable.php
index 01221e3..9c027cf 100644
--- a/sources/getCheckOutTable.php
+++ b/sources/getCheckOutTable.php
@@ -295,15 +295,35 @@ function echoMarkedTimeLine(?string $dateStr, ?int $timeSeconds, DateTimeImmutab
     echo $cls ? "</span>" : "";
 }
 
+/*
 function getTimeFromSeconds(string $timestring) {
 
     $hours = floor($timestring / 3600);
-    $mins = floor($timestring / 60 % 60);
-    $secs = floor($timestring % 60);
+    $mins = floor(round($timestring / 60 % 60));
+    $secs = floor(round($timestring % 60));
 
     $timeFormat = sprintf('%02d:%02d', $hours, $mins);
 
     return $timeFormat;
+}*/
+function getTimeFromSeconds($seconds): string {
+    if ($seconds === null || $seconds === '') {
+        return '';
+    }
+
+    // robust normalisieren: String/Float -> Float -> gerundet -> Int
+    $seconds = (int) round((float) $seconds);
+
+    if ($seconds < 0) {
+        $seconds = 0; // oder: return ''; je nach gewünschtem Verhalten
+    }
+
+    // reine Integer-Arithmetik, keine impliziten float->int Casts
+    $hours = intdiv($seconds, 3600);
+    $mins  = intdiv($seconds % 3600, 60);
+
+    return sprintf('%02d:%02d', $hours, $mins);
 }
 
+
 ?>