diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index abc8c0c2777887644e661319afaf6fa62da27a72..c658ad70c49e504837494113adcbe715e7510344 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -113,10 +113,62 @@ export class AppComponent implements OnInit, OnDestroy, Observer {
         case "invalidid":
           this.toList();
           break;
+
+
+        case "close":
+          const uid: number = data["formid"];
+          this.closeCalculator(uid);
+          break;
       }
     }
   }
 
+  private closeCalculator(formId: number) {
+    // recherche de la calculette correspondante à formId
+
+    const closedIndex = this._calculators.reduce((resultIndex, calc, currIndex) => {
+      if (resultIndex == -1 && calc["uid"] == formId)
+        resultIndex = currIndex;
+      return resultIndex;
+    }, -1);
+
+    /*
+     * détermination de la nouvelle calculette à afficher : 
+     * - celle après celle supprimée
+     * - ou celle avant celle supprimée si on supprime la dernière
+     */
+
+    let newId: number = -1;
+    const l = this._calculators.length;
+    if (l > 1) {
+      if (closedIndex == l - 1)
+        newId = +this._calculators[closedIndex - 1]["uid"];
+      else
+        newId = +this._calculators[closedIndex + 1]["uid"];
+    }
+
+    // suppression
+
+    this._calculators = this._calculators.filter(calc => {
+      return formId != +calc["uid"]
+    });
+
+    // MAJ affichage
+
+    if (newId == -1)
+      this.toList();
+    else
+      this.toCalc(newId);
+  }
+
+  private toList() {
+    this.router.navigate(['/list']);
+  }
+
+  private toCalc(id: number) {
+    this.router.navigate(['/calculator', id]);
+  }
+
   // sidenav
 
   private openNav() {
@@ -132,9 +184,5 @@ export class AppComponent implements OnInit, OnDestroy, Observer {
     this.toList();
   }
 
-  private toList() {
-    this.router.navigate(['/list']);
-  }
-
   // sidenav
 }
diff --git a/src/app/calculators/generic/calculator.component.html b/src/app/calculators/generic/calculator.component.html
index 0c875daebf755d3f251c0e2227d4da51561c40bd..7ad429e2a78794bbd8479bb7ce87b4185dbd360e 100644
--- a/src/app/calculators/generic/calculator.component.html
+++ b/src/app/calculators/generic/calculator.component.html
@@ -1,7 +1,10 @@
 <div *ngIf="hasData()" class="row">
-    <div class="col">
+    <div class="col-10">
         <h1>{{uitextTitre}}</h1>
     </div>
+    <div class="col-2">
+        <button type="button" class="btn btn-primary float-right black" (click)="onCloseForm()">×</button>
+    </div>
 </div>
 <field-set *ngFor="let fs of fieldSets" [style.display]="getFieldsetStyleDisplay(fs.id)" [fieldSet]=fs (onRadio)=onRadioClick($event)
     (onSelectChange)=onSelectChanged($event)></field-set>
diff --git a/src/app/calculators/generic/calculator.component.ts b/src/app/calculators/generic/calculator.component.ts
index 5aa78c18da3dcfa8b5b56025481e12fc4fb646e6..d0ac5c5712fa5840cf56705ef22eeae490399921 100644
--- a/src/app/calculators/generic/calculator.component.ts
+++ b/src/app/calculators/generic/calculator.component.ts
@@ -128,6 +128,10 @@ export class GenericCalculatorComponent implements OnInit, DoCheck, OnDestroy, O
         this._formulaire.resetRadiosAndResults(symbol, option);
     }
 
+    private onCloseForm() {
+        this.formulaireService.requestCloseForm(this._formulaire.uid);
+    }
+
     /**
      * met à jour l'interface
      */
diff --git a/src/app/services/formulaire/formulaire.service.ts b/src/app/services/formulaire/formulaire.service.ts
index d83991a8e3d024d6717488ec290d6a440b83da44..e6c93a407fac7e06af2c2a3368a903023442f5fd 100644
--- a/src/app/services/formulaire/formulaire.service.ts
+++ b/src/app/services/formulaire/formulaire.service.ts
@@ -179,4 +179,16 @@ export class FormulaireService extends Observable {
                 throw "FormulaireService.getConfigPathPrefix() : valeur de CalculatorType " + ct + " non implémentée"
         }
     }
+
+    public requestCloseForm(uid: number) {
+        const form = this.getFormulaireFromId(uid);
+        if (form != undefined) {
+            this._formulaires = this._formulaires.filter(f => f.uid !== uid);
+
+            this.notifyObservers({
+                "action": "close",
+                "formid": uid
+            });
+        }
+    }
 }