diff --git a/.hgignore b/.hgignore
index acd48da3d..44edfcd0f 100644
--- a/.hgignore
+++ b/.hgignore
@@ -159,3 +159,6 @@ $RECYCLE.BIN/
 
 # Windows shortcuts
 *.lnk
+
+# Understand IDE file
+*.udb
\ No newline at end of file
diff --git a/ChangeLog.txt b/ChangeLog.txt
index 63b889358..6bb227791 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -1,4 +1,5 @@
 # Version 0.5.0
+- [#581] User can now filter input lists by keyword in function wizard.
 - [#24] User can now add labels with different information on the detail
 - [#505] New installer script based on Inno Setup 5.
 - Size of preferences dialog in both Valentina and Tape app is now preserved between sessions
diff --git a/src/libs/vtools/dialogs/support/dialogeditwrongformula.cpp b/src/libs/vtools/dialogs/support/dialogeditwrongformula.cpp
index b9603cfaa..1a07b83e6 100644
--- a/src/libs/vtools/dialogs/support/dialogeditwrongformula.cpp
+++ b/src/libs/vtools/dialogs/support/dialogeditwrongformula.cpp
@@ -85,6 +85,11 @@ DialogEditWrongFormula::DialogEditWrongFormula(const VContainer *data, const qui
     this->formulaBaseHeight = ui->plainTextEditFormula->height();
     ui->plainTextEditFormula->installEventFilter(this);
 
+#if QT_VERSION >= QT_VERSION_CHECK(5, 2, 0)
+    ui->filterFormulaInputs->setClearButtonEnabled(true);
+#endif
+    connect(ui->filterFormulaInputs, &QLineEdit::textChanged, this, &DialogEditWrongFormula::FilterVariablesEdited);
+
     InitOkCancel(ui);
     flagFormula = false;
     CheckState();
@@ -398,16 +403,37 @@ void DialogEditWrongFormula::InitVariables()
     ui->radioButtonStandardTable->setChecked(true);
     Measurements();
 
+    // clear text filter every time when new radio button selected
+    auto ClearFilterFormulaInputs = [=] () { ui->filterFormulaInputs->clear(); };
+
     connect(ui->radioButtonStandardTable, &QRadioButton::clicked, this, &DialogEditWrongFormula::Measurements);
+    connect(ui->radioButtonStandardTable, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonIncrements, &QRadioButton::clicked, this, &DialogEditWrongFormula::Increments);
+    connect(ui->radioButtonIncrements, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonLengthLine, &QRadioButton::clicked, this, &DialogEditWrongFormula::LengthLines);
+    connect(ui->radioButtonLengthLine, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonLengthSpline, &QRadioButton::clicked, this, &DialogEditWrongFormula::LengthCurves);
+    connect(ui->radioButtonLengthSpline, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonAngleLine, &QRadioButton::clicked, this, &DialogEditWrongFormula::AngleLines);
-    connect(ui->checkBoxHideEmpty, &QCheckBox::stateChanged, this, &DialogEditWrongFormula::Measurements);
+    connect(ui->radioButtonAngleLine, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonRadiusesArcs, &QRadioButton::clicked, this, &DialogEditWrongFormula::RadiusArcs);
+    connect(ui->radioButtonRadiusesArcs, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonAnglesCurves, &QRadioButton::clicked, this, &DialogEditWrongFormula::AnglesCurves);
+    connect(ui->radioButtonAnglesCurves, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonCLength, &QRadioButton::clicked, this, &DialogEditWrongFormula::CurvesCLength);
+    connect(ui->radioButtonCLength, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
     connect(ui->radioButtonFunctions, &QRadioButton::clicked, this, &DialogEditWrongFormula::Functions);
+    connect(ui->radioButtonFunctions, &QRadioButton::clicked, this, ClearFilterFormulaInputs);
+
+    connect(ui->checkBoxHideEmpty, &QCheckBox::stateChanged, this, &DialogEditWrongFormula::Measurements);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -529,3 +555,40 @@ void DialogEditWrongFormula::ShowFunctions()
     ui->tableWidget->selectRow(0);
     ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void DialogEditWrongFormula::FilterVariablesEdited(const QString &filter)
+{
+    ui->tableWidget->blockSignals(true);
+
+    // If filter is empty findItems() for unknown reason returns nullptr items.
+    // See issue #586. https://bitbucket.org/dismine/valentina/issues/586/valentina-crashes-if-clear-input-filter
+    if (filter.isEmpty())
+    {
+        // show all rows
+        for (auto i = 0; i < ui->tableWidget->rowCount(); ++i)
+        {
+            ui->tableWidget->showRow(i);
+        }
+    }
+    else
+    {
+        // hide all rows
+        for (auto i = 0; i < ui->tableWidget->rowCount(); i++)
+        {
+            ui->tableWidget->hideRow(i);
+        }
+
+        // show rows with matched filter
+        for (auto item : ui->tableWidget->findItems(filter, Qt::MatchContains))
+        {
+            // If filter is empty findItems() for unknown reason returns nullptr items.
+            if (item)
+            {
+                ui->tableWidget->showRow(item->row());
+            }
+        }
+    }
+
+    ui->tableWidget->blockSignals(false);
+}
diff --git a/src/libs/vtools/dialogs/support/dialogeditwrongformula.h b/src/libs/vtools/dialogs/support/dialogeditwrongformula.h
index 2e1255e85..247aeb33c 100644
--- a/src/libs/vtools/dialogs/support/dialogeditwrongformula.h
+++ b/src/libs/vtools/dialogs/support/dialogeditwrongformula.h
@@ -96,6 +96,8 @@ protected:
     virtual void CheckState() Q_DECL_OVERRIDE;
     virtual void closeEvent(QCloseEvent *event) Q_DECL_OVERRIDE;
     virtual void showEvent( QShowEvent *event ) Q_DECL_OVERRIDE;
+private slots:
+    void FilterVariablesEdited(const QString &filter);
 private:
     Q_DISABLE_COPY(DialogEditWrongFormula)
     Ui::DialogEditWrongFormula *ui;
diff --git a/src/libs/vtools/dialogs/support/dialogeditwrongformula.ui b/src/libs/vtools/dialogs/support/dialogeditwrongformula.ui
index 8f952605e..edc6da1ba 100644
--- a/src/libs/vtools/dialogs/support/dialogeditwrongformula.ui
+++ b/src/libs/vtools/dialogs/support/dialogeditwrongformula.ui
@@ -355,6 +355,13 @@
      </item>
      <item>
       <layout class="QVBoxLayout" name="verticalLayout">
+       <item>
+        <widget class="QLineEdit" name="filterFormulaInputs">
+         <property name="placeholderText">
+          <string>Filter list by keyword</string>
+         </property>
+        </widget>
+       </item>
        <item>
         <widget class="QCheckBox" name="checkBoxHideEmpty">
          <property name="text">