diff --git a/src/app/dialogs/tools/dialogarc.cpp b/src/app/dialogs/tools/dialogarc.cpp
index e41f7b862..a7b3d5eaa 100644
--- a/src/app/dialogs/tools/dialogarc.cpp
+++ b/src/app/dialogs/tools/dialogarc.cpp
@@ -298,6 +298,7 @@ void DialogArc::LineAngles()
 void DialogArc::RadiusChanged()
 {
     labelEditFormula = ui->labelEditRadius;
+    labelResultCalculation = ui->labelResultRadius;
     ValFormulaChanged(flagRadius, ui->plainTextEditFormula, timerRadius);
 }
 
@@ -308,6 +309,7 @@ void DialogArc::RadiusChanged()
 void DialogArc::F1Changed()
 {
     labelEditFormula = ui->labelEditF1;
+    labelResultCalculation = ui->labelResultF1;
     ValFormulaChanged(flagF1, ui->plainTextEditF1, timerF1);
 }
 
@@ -318,6 +320,7 @@ void DialogArc::F1Changed()
 void DialogArc::F2Changed()
 {
     labelEditFormula = ui->labelEditF2;
+    labelResultCalculation = ui->labelResultF2;
     ValFormulaChanged(flagF2, ui->plainTextEditF2, timerF2);
 }
 
@@ -341,7 +344,7 @@ void DialogArc::EvalRadius()
 {
     labelEditFormula = ui->labelEditRadius;
     const QString postfix = VDomDocument::UnitsToStr(qApp->patternUnit(), true);
-    Eval(ui->plainTextEditFormula->toPlainText(), flagRadius, timerRadius, ui->labelResultRadius, postfix);
+    Eval(ui->plainTextEditFormula->toPlainText(), flagRadius, ui->labelResultRadius, postfix);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -352,7 +355,7 @@ void DialogArc::EvalF1()
 {
     labelEditFormula = ui->labelEditF1;
     const QString postfix = QStringLiteral("°");
-    Eval(ui->plainTextEditF1->toPlainText(), flagF1, timerF1, ui->labelResultF1, postfix, false);
+    Eval(ui->plainTextEditF1->toPlainText(), flagF1, ui->labelResultF1, postfix, false);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -363,7 +366,7 @@ void DialogArc::EvalF2()
 {
     labelEditFormula = ui->labelEditF2;
     const QString postfix = QStringLiteral("°");
-    Eval(ui->plainTextEditF2->toPlainText(), flagF2, timerF2, ui->labelResultF2, postfix, false);
+    Eval(ui->plainTextEditF2->toPlainText(), flagF2, ui->labelResultF2, postfix, false);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogeditwrongformula.cpp b/src/app/dialogs/tools/dialogeditwrongformula.cpp
index 6c81c10bb..3f9ed69a7 100644
--- a/src/app/dialogs/tools/dialogeditwrongformula.cpp
+++ b/src/app/dialogs/tools/dialogeditwrongformula.cpp
@@ -102,7 +102,7 @@ void DialogEditWrongFormula::EvalFormula()
 {
     SCASSERT(plainTextEditFormula != nullptr);
     SCASSERT(labelResultCalculation != nullptr);
-    Eval(plainTextEditFormula->toPlainText(), flagFormula, timerFormula, labelResultCalculation, postfix, checkZero);
+    Eval(plainTextEditFormula->toPlainText(), flagFormula, labelResultCalculation, postfix, checkZero);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogendline.cpp b/src/app/dialogs/tools/dialogendline.cpp
index e1009d46a..4d02ddc91 100644
--- a/src/app/dialogs/tools/dialogendline.cpp
+++ b/src/app/dialogs/tools/dialogendline.cpp
@@ -97,8 +97,7 @@ void DialogEndLine::EvalAngle()
 {
     labelEditFormula = ui->labelEditAngle;
     const QString postfix = QStringLiteral("°");
-    Eval(ui->plainTextEditAngle->toPlainText(), flagError, timerFormula, ui->labelResultCalculationAngle, postfix,
-         false);
+    Eval(ui->plainTextEditAngle->toPlainText(), flagError, ui->labelResultCalculationAngle, postfix, false);
     labelEditFormula = ui->labelEditFormula;
 }
 
diff --git a/src/app/dialogs/tools/dialogtool.cpp b/src/app/dialogs/tools/dialogtool.cpp
index f3c2e443f..dab266e3b 100644
--- a/src/app/dialogs/tools/dialogtool.cpp
+++ b/src/app/dialogs/tools/dialogtool.cpp
@@ -413,15 +413,12 @@ void DialogTool::ValFormulaChanged(bool &flag, QPlainTextEdit *edit, QTimer *tim
  * @brief Eval evaluate formula and show result
  * @param text formula
  * @param flag flag state of formula
- * @param timer timer of formula
  * @param label label for signal error
  * @param postfix unit name
  * @param checkZero true - if formula can't be equal zero
  */
-void DialogTool::Eval(const QString &text, bool &flag, QTimer *timer, QLabel *label, const QString& postfix,
-                      bool checkZero)
+void DialogTool::Eval(const QString &text, bool &flag, QLabel *label, const QString& postfix, bool checkZero)
 {
-    SCASSERT(timer != nullptr);
     SCASSERT(label != nullptr);
     SCASSERT(labelEditFormula != nullptr);
     if (text.isEmpty())
@@ -484,7 +481,6 @@ void DialogTool::Eval(const QString &text, bool &flag, QTimer *timer, QLabel *la
         }
     }
     CheckState();
-    //timer->stop();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -834,7 +830,7 @@ void DialogTool::EvalFormula()
     SCASSERT(plainTextEditFormula != nullptr);
     SCASSERT(labelResultCalculation != nullptr);
     const QString postfix = VDomDocument::UnitsToStr(qApp->patternUnit());
-    Eval(plainTextEditFormula->toPlainText(), flagFormula, timerFormula, labelResultCalculation, postfix);
+    Eval(plainTextEditFormula->toPlainText(), flagFormula, labelResultCalculation, postfix);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogtool.h b/src/app/dialogs/tools/dialogtool.h
index 659cc7069..afbf27350 100644
--- a/src/app/dialogs/tools/dialogtool.h
+++ b/src/app/dialogs/tools/dialogtool.h
@@ -221,7 +221,7 @@ protected:
     void             PutValHere(QPlainTextEdit *plainTextEdit, QListWidget *listWidget);
     void             ValFormulaChanged(bool &flag, QLineEdit *edit, QTimer * timer);
     void             ValFormulaChanged(bool &flag, QPlainTextEdit *edit, QTimer * timer);
-    void             Eval(const QString &text, bool &flag, QTimer *timer, QLabel *label, const QString &postfix,
+    void             Eval(const QString &text, bool &flag, QLabel *label, const QString &postfix,
                           bool checkZero = true);
     void             setCurrentPointId(QComboBox *box, quint32 &pointId, const quint32 &value) const;
     void             setCurrentSplineId(QComboBox *box, quint32 &splineId, const quint32 &value,