diff --git a/src/app/tape/tmainwindow.cpp b/src/app/tape/tmainwindow.cpp
index 7e86fa957..7df09786b 100644
--- a/src/app/tape/tmainwindow.cpp
+++ b/src/app/tape/tmainwindow.cpp
@@ -2421,9 +2421,8 @@ bool TMainWindow::EvalFormula(const QString &formula, bool fromUser, VContainer
                 f = formula;
             }
             f.replace("\n", " ");
-            Calculator *cal = new Calculator();
+            QScopedPointer<Calculator> cal(new Calculator());
             qreal result = cal->EvalFormula(data->PlainVariables(), f);
-            delete cal;
 
             if (qIsInf(result) || qIsNaN(result))
             {
diff --git a/src/app/valentina/dialogs/dialogincrements.cpp b/src/app/valentina/dialogs/dialogincrements.cpp
index 9c936f882..c308b3ff4 100644
--- a/src/app/valentina/dialogs/dialogincrements.cpp
+++ b/src/app/valentina/dialogs/dialogincrements.cpp
@@ -310,9 +310,8 @@ bool DialogIncrements::EvalIncrementFormula(const QString &formula, bool fromUse
                 f = formula;
             }
             f.replace("\n", " ");
-            Calculator *cal = new Calculator();
+            QScopedPointer<Calculator> cal(new Calculator());
             const qreal result = cal->EvalFormula(data->PlainVariables(), f);
-            delete cal;
 
             if (qIsInf(result) || qIsNaN(result))
             {
diff --git a/src/app/valentina/xml/vpattern.cpp b/src/app/valentina/xml/vpattern.cpp
index 3aed8a375..d6fd0c0c4 100644
--- a/src/app/valentina/xml/vpattern.cpp
+++ b/src/app/valentina/xml/vpattern.cpp
@@ -2455,9 +2455,8 @@ qreal VPattern::EvalFormula(VContainer *data, const QString &formula, bool *ok)
             // Replace line return character with spaces for calc if exist
             QString f = formula;
             f.replace("\n", " ");
-            Calculator *cal = new Calculator();
+            QScopedPointer<Calculator> cal(new Calculator());
             const qreal result = cal->EvalFormula(data->PlainVariables(), f);
-            delete cal;
 
             (qIsInf(result) || qIsNaN(result)) ? *ok = false : *ok = true;
             return result;
diff --git a/src/libs/vformat/vmeasurements.cpp b/src/libs/vformat/vmeasurements.cpp
index de4e0402a..346931428 100644
--- a/src/libs/vformat/vmeasurements.cpp
+++ b/src/libs/vformat/vmeasurements.cpp
@@ -879,9 +879,8 @@ qreal VMeasurements::EvalFormula(VContainer *data, const QString &formula, bool
             // Replace line return character with spaces for calc if exist
             QString f = formula;
             f.replace("\n", " ");
-            Calculator *cal = new Calculator();
+            QScopedPointer<Calculator> cal(new Calculator());
             const qreal result = cal->EvalFormula(data->PlainVariables(), f);
-            delete cal;
 
             (qIsInf(result) || qIsNaN(result)) ? *ok = false : *ok = true;
             return result;
diff --git a/src/libs/vpatterndb/calculator.h b/src/libs/vpatterndb/calculator.h
index c3d89c22d..8f6030247 100644
--- a/src/libs/vpatterndb/calculator.h
+++ b/src/libs/vpatterndb/calculator.h
@@ -48,9 +48,8 @@ class VContainer;
  *     //Need delete dialog here because parser in dialog don't allow use correct separator for parsing here.
  *     //Don't know why.
  *     delete dialog;
- *     Calculator *cal = new Calculator();
+ *     QScopedPointer<Calculator> cal(new Calculator());
  *     result = cal->EvalFormula(data->PlainVariables(), formula);
- *     delete cal;//Here can be memory leak, but dialog already check this formula and probability very low.
  * }
  */
 class Calculator:public qmu::QmuFormulaBase
diff --git a/src/libs/vpatterndb/vformula.cpp b/src/libs/vpatterndb/vformula.cpp
index 811b2a4b8..703146d8b 100644
--- a/src/libs/vpatterndb/vformula.cpp
+++ b/src/libs/vpatterndb/vformula.cpp
@@ -234,10 +234,9 @@ void VFormula::Eval()
     {
         try
         {
-            Calculator *cal = new Calculator();
+            QScopedPointer<Calculator> cal(new Calculator());
             QString expression = qApp->TrVars()->FormulaFromUser(formula, qApp->Settings()->GetOsSeparator());
             const qreal result = cal->EvalFormula(data->PlainVariables(), expression);
-            delete cal;
 
             if (qIsInf(result) || qIsNaN(result))
             {
diff --git a/src/libs/vtools/dialogs/tools/dialogtool.cpp b/src/libs/vtools/dialogs/tools/dialogtool.cpp
index 9b0c1f080..200a52287 100644
--- a/src/libs/vtools/dialogs/tools/dialogtool.cpp
+++ b/src/libs/vtools/dialogs/tools/dialogtool.cpp
@@ -449,9 +449,8 @@ qreal DialogTool::Eval(const QString &text, bool &flag, QLabel *label, const QSt
             formula.replace("\n", " ");
             // Translate to internal look.
             formula = qApp->TrVars()->FormulaFromUser(formula, qApp->Settings()->GetOsSeparator());
-            Calculator *cal = new Calculator();
+            QScopedPointer<Calculator> cal(new Calculator());
             result = cal->EvalFormula(data->PlainVariables(), formula);
-            delete cal;
 
             if (qIsInf(result) || qIsNaN(result))
             {
diff --git a/src/libs/vtools/tools/drawTools/vdrawtool.cpp b/src/libs/vtools/tools/drawTools/vdrawtool.cpp
index 29ac0a7c3..348ece144 100644
--- a/src/libs/vtools/tools/drawTools/vdrawtool.cpp
+++ b/src/libs/vtools/tools/drawTools/vdrawtool.cpp
@@ -294,9 +294,8 @@ qreal VDrawTool::CheckFormula(const quint32 &toolId, QString &formula, VContaine
     Calculator *cal = nullptr;
     try
     {
-        cal = new Calculator();
+        QScopedPointer<Calculator> cal(new Calculator());
         result = cal->EvalFormula(data->PlainVariables(), formula);
-        delete cal;
 
         if (qIsInf(result) || qIsNaN(result))
         {
@@ -311,11 +310,10 @@ qreal VDrawTool::CheckFormula(const quint32 &toolId, QString &formula, VContaine
                  << "Message:     " << e.GetMsg()  << "\n"
                  << "Expression:  " << e.GetExpr() << "\n"
                  << "--------------------------------------";
-        delete cal;
 
         if (qApp->IsAppInGUIMode())
         {
-            DialogUndo *dialogUndo = new DialogUndo(qApp->getMainWindow());
+            QScopedPointer<DialogUndo> dialogUndo(new DialogUndo(qApp->getMainWindow()));
             forever
             {
                 if (dialogUndo->exec() == QDialog::Accepted)
@@ -323,8 +321,7 @@ qreal VDrawTool::CheckFormula(const quint32 &toolId, QString &formula, VContaine
                     const UndoButton resultUndo = dialogUndo->Result();
                     if (resultUndo == UndoButton::Fix)
                     {
-                        DialogEditWrongFormula *dialog = new DialogEditWrongFormula(data, toolId,
-                                                                                    qApp->getMainWindow());
+                        auto *dialog = new DialogEditWrongFormula(data, toolId, qApp->getMainWindow());
                         dialog->setWindowTitle(tr("Edit wrong formula"));
                         dialog->SetFormula(formula);
                         if (dialog->exec() == QDialog::Accepted)
@@ -333,10 +330,8 @@ qreal VDrawTool::CheckFormula(const quint32 &toolId, QString &formula, VContaine
                             /* Need delete dialog here because parser in dialog don't allow use correct separator for
                              * parsing here. */
                             delete dialog;
-                            Calculator *cal1 = new Calculator();
+                            QScopedPointer<Calculator> cal1(new Calculator());
                             result = cal1->EvalFormula(data->PlainVariables(), formula);
-                            delete cal1; /* Here can be memory leak, but dialog already checked this formula and
-                                            probability very low. */
 
                             if (qIsInf(result) || qIsNaN(result))
                             {
@@ -358,11 +353,9 @@ qreal VDrawTool::CheckFormula(const quint32 &toolId, QString &formula, VContaine
                 }
                 else
                 {
-                    delete dialogUndo;
                     throw;
                 }
             }
-            delete dialogUndo;
         }
         else
         {
diff --git a/src/libs/vtools/visualization/visualization.cpp b/src/libs/vtools/visualization/visualization.cpp
index 04292b85f..fc0838621 100644
--- a/src/libs/vtools/visualization/visualization.cpp
+++ b/src/libs/vtools/visualization/visualization.cpp
@@ -158,9 +158,8 @@ qreal Visualization::FindVal(const QString &expression, const QHash<QString, qre
             QString formula = expression;
             formula.replace("\n", " ");
             formula = qApp->TrVars()->FormulaFromUser(formula, qApp->Settings()->GetOsSeparator());
-            Calculator *cal = new Calculator();
+            QScopedPointer<Calculator> cal(new Calculator());
             val = cal->EvalFormula(vars, formula);
-            delete cal;
 
             if (qIsInf(val) || qIsNaN(val))
             {