diff --git a/jdav_web/material/admin.py b/jdav_web/material/admin.py
index 986ab8d..f285118 100644
--- a/jdav_web/material/admin.py
+++ b/jdav_web/material/admin.py
@@ -36,7 +36,7 @@ class NotTooOldFilter(SimpleListFilter):
 class MaterialAdmin(admin.ModelAdmin):
     """Edit view of a MaterialPart"""
 
-    list_display = ('name', 'buy_date', 'lifetime', 'not_too_old', 'photo')
+    list_display = ('name', 'quantity_real', 'buy_date', 'lifetime', 'not_too_old', 'photo')
     inlines = [OwnershipInline]
     list_filter = (NotTooOldFilter,)
 
diff --git a/jdav_web/material/materials.json b/jdav_web/material/materials.json
index 32c2bac..da53968 100644
--- a/jdav_web/material/materials.json
+++ b/jdav_web/material/materials.json
@@ -5,7 +5,8 @@
 		"fields": {
 			"name": "Seil 40m grün",
 			"buy_date": "2016-01-01",
-			"lifetime": "3"
+			"lifetime": "3",
+			"quantity": "3"
 		}
 	},
 	{
@@ -14,7 +15,8 @@
 		"fields": {
 			"name": "Seil 40m blau",
 			"buy_date": "2012-01-01",
-			"lifetime": "3"
+			"lifetime": "3",
+			"quantity": "10"
 		}
 	},
 	{
@@ -23,7 +25,8 @@
 		"fields": {
 			"name": "Seil 60m gelb",
 			"buy_date": "2013-01-01",
-			"lifetime": "3"
+			"lifetime": "3",
+			"quantity": "5"
 		}
 	},
 	{
@@ -32,7 +35,8 @@
 		"fields": {
 			"name": "Seil 60m blau",
 			"buy_date": "2016-01-01",
-			"lifetime": "3"
+			"lifetime": "3",
+			"quantity": "2"
 		}
 	}
 ]
\ No newline at end of file
diff --git a/jdav_web/material/models.py b/jdav_web/material/models.py
index 131eec9..cc6226b 100644
--- a/jdav_web/material/models.py
+++ b/jdav_web/material/models.py
@@ -15,15 +15,23 @@ class MaterialPart(models.Model):
     members of the association (Ownership)
     """
     name = models.CharField(_('name'), max_length=30)
+    quantity = models.IntegerField(_('quantity'), default=0)
     buy_date = models.DateField(_('purchase date'), editable=True)
-    lifetime = models.DecimalField(_('lifetime (years)'), decimal_places=0,
-                                   max_digits=3)
+    lifetime = models.DecimalField(_('lifetime (years)'), decimal_places=0, max_digits=3)
     photo = models.ImageField(_('photo'), upload_to='images', blank=True)
 
     def __str__(self):
         """String representation"""
         return self.name
 
+    def quantity_real(self):
+        real = sum([o.count for o in Ownership.objects.filter(material__id = self.pk)])
+        return str(real) + '/' + str(self.quantity)
+
+    quantity_real.admin_order_field = 'quantity'
+    quantity_real.short_description = _('Quantity')
+
+
     def not_too_old(self):
         """Returns wether the part should be replaced cause of age"""
         buy_time = timezone.make_aware(datetime.combine(self.buy_date,