diff --git a/uncloud/uncloud_vm/models.py b/uncloud/uncloud_vm/models.py
index 2bb27e9..70ffd80 100644
--- a/uncloud/uncloud_vm/models.py
+++ b/uncloud/uncloud_vm/models.py
@@ -45,6 +45,10 @@ class VMHost(models.Model):
     def vms(self):
         return VMProduct.objects.filter(vmhost=self)
 
+    @property
+    def used_ram_in_gb(self):
+        return sum([vm.ram_in_gb for vm in VMProduct.objects.filter(vmhost=self)])
+
     @property
     def available_ram_in_gb(self):
         return self.usable_ram_in_gb - sum([vm.ram_in_gb for vm in self.vms ])