diff --git a/src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentDuration.php b/src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentAvgDuration.php
similarity index 96%
rename from src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentDuration.php
rename to src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentAvgDuration.php
index c46aaaf0c..854172a2a 100644
--- a/src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentDuration.php
+++ b/src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentAvgDuration.php
@@ -13,7 +13,7 @@ use Doctrine\ORM\QueryBuilder;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Security\Core\Role\Role;
 
-class StatAppointmentDuration implements ExportInterface, GroupedExportInterface
+class StatAppointmentAvgDuration implements ExportInterface, GroupedExportInterface
 {
 
     private CalendarRepository $calendarRepository;
diff --git a/src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentSumDuration.php b/src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentSumDuration.php
new file mode 100644
index 000000000..0e362d766
--- /dev/null
+++ b/src/Bundle/ChillCalendarBundle/Export/Export/StatAppointmentSumDuration.php
@@ -0,0 +1,102 @@
+<?php
+
+namespace Chill\CalendarBundle\Export\Export;
+
+use Chill\CalendarBundle\Export\Declarations;
+use Chill\CalendarBundle\Repository\CalendarRepository;
+use Chill\MainBundle\Export\ExportInterface;
+use Chill\MainBundle\Export\FormatterInterface;
+use Chill\MainBundle\Export\GroupedExportInterface;
+use Chill\PersonBundle\Security\Authorization\AccompanyingPeriodVoter;
+use Doctrine\ORM\Query;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Security\Core\Role\Role;
+
+class StatAppointmentSumDuration implements ExportInterface, GroupedExportInterface
+{
+    private CalendarRepository $calendarRepository;
+
+    public function __construct(
+        CalendarRepository $calendarRepository
+    ) {
+        $this->calendarRepository = $calendarRepository;
+    }
+
+    public function buildForm(FormBuilderInterface $builder): void
+    {
+        // no form needed
+    }
+
+    public function getTitle(): string
+    {
+        return 'Sum of appointment durations';
+    }
+
+    public function getAllowedFormattersTypes(): array
+    {
+        return [FormatterInterface::TYPE_TABULAR];
+    }
+
+    public function getDescription(): string
+    {
+        return 'Get the sum of appointment durations according to various filters';
+    }
+
+    public function getLabels($key, array $values, $data)
+    {
+        if ('export_result' !== $key) {
+            throw new \LogicException("the key {$key} is not used by this export");
+        }
+
+        $labels = array_combine($values, $values);
+        $labels['_header'] = $this->getTitle();
+
+        return static function ($value) use ($labels) {
+            return $labels[$value];
+        };
+    }
+
+    public function getQueryKeys($data): array
+    {
+        return ['export_result'];
+    }
+
+    public function getResult($qb, $data)
+    {
+        return $qb->getQuery()->getResult(Query::HYDRATE_SCALAR);
+    }
+
+    public function getType(): string
+    {
+        return Declarations::CALENDAR_TYPE;
+    }
+
+    public function initiateQuery(array $requiredModifiers, array $acl, array $data = []): QueryBuilder
+    {
+        $qb = $this->calendarRepository->createQueryBuilder('cal');
+
+        $qb
+            ->select('SUM(cal.endDate - cal.startDate) AS export_result');
+
+        return $qb;
+    }
+
+    public function requiredRole(): Role
+    {
+        return new Role(AccompanyingPeriodVoter::STATS);
+    }
+
+    public function supportsModifiers(): array
+    {
+        return [
+            Declarations::CALENDAR_TYPE
+        ];
+    }
+
+    public function getGroup(): string
+    {
+        return 'Exports of calendar';
+    }
+
+}
\ No newline at end of file