diff --git a/src/app/virtualmachines/volumeOverview.component.html b/src/app/virtualmachines/volumeOverview.component.html
index 13ff692c73..81e0f8a832 100644
--- a/src/app/virtualmachines/volumeOverview.component.html
+++ b/src/app/virtualmachines/volumeOverview.component.html
@@ -373,7 +373,7 @@ <h4 class="modal-title">Create & Attach Volume</h4>
                     <div class="col-md-9">
                         <div class="input-group">
                             <input min="0" step="1" [value]="diskspace"
-                                   (input)="diskspace = $event.target.value" type="number" placeholder="e.g 8 "><span
+                                   (input)="diskspace = $event.target.value;calcDiskSpaceSum();" type="number" placeholder="e.g 8 "><span
                                 class="input-group-addon"> GB
                                     </span>
 
@@ -381,7 +381,7 @@ <h4 class="modal-title">Create & Attach Volume</h4>
                         </div>
                     </div>
                 </div>
-                <div *ngIf="selected_vm && (diskspace + selectedProjectDiskspaceUsed) > selectedProjectVolumesMax"
+                <div *ngIf="selected_vm && (selectedProjectDiskSpaceSum > selectedProjectDiskspaceMax)"
                      class="alert alert-danger">
                     The storage limit is exceeded
 
@@ -390,7 +390,7 @@ <h4 class="modal-title">Create & Attach Volume</h4>
             </div>
             <div class="modal-footer">
                 <button class="btn  btn-success col-md-6"
-                        [disabled]="selected_vm == undefined || diskspace <= 0 || volumeName.length == 0 || (diskspace + selectedProjectDiskspaceUsed) > selectedProjectVolumesMax"
+                        [disabled]="selected_vm == undefined || diskspace <= 0 || volumeName.length == 0 || (selectedProjectDiskSpaceSum > selectedProjectDiskspaceMax)"
                         (click)="createAndAttachvolume(volumeName,diskspace,selected_vm.openstackid);createModal.hide();resultModal.show()">
                     Create & Attach Volume
                 </button>
diff --git a/src/app/virtualmachines/volumeOverview.component.ts b/src/app/virtualmachines/volumeOverview.component.ts
index f2aacb2a18..18cc37d623 100644
--- a/src/app/virtualmachines/volumeOverview.component.ts
+++ b/src/app/virtualmachines/volumeOverview.component.ts
@@ -23,6 +23,7 @@ export class VolumeOverviewComponent implements OnInit {
     selectedProjectDiskspaceUsed: number;
     selectedProjectVolumesMax: number;
     selectedProjectVolumesUsed: number;
+    selectedProjectDiskSpaceSum:number;
     selectedProject: [string, number];
     projects: string[] = new Array();
     diskspace: number = 1;
@@ -75,6 +76,10 @@ export class VolumeOverviewComponent implements OnInit {
         })
     }
 
+    calcDiskSpaceSum():void{
+        this.selectedProjectDiskSpaceSum=parseInt(this.diskspace.toString()) + parseInt(this.selectedProjectDiskspaceUsed.toString());
+    }
+
 
     getSelectedProjectDiskspace(): void {
         this.groupService.getGroupMaxDiskspace(this.selectedProject[1].toString()).subscribe(result => {