diff --git a/ChangeLog.txt b/ChangeLog.txt
index 04bc38d4d..3c840dcfe 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -6,6 +6,7 @@
 - [#637] Max scene size too small to fit all objects.
 - New feature Zoom Fit Best Current pattern piece.
 - [#693] New feature: Sort workpiece "Groups" by name.
+- [#712] Default seam allowance setting.
 
 # Version 0.5.1
 - [#683] Tool Seam allowance's dialog is off screen on small resolutions.
diff --git a/src/app/valentina/dialogs/configpages/preferencespatternpage.cpp b/src/app/valentina/dialogs/configpages/preferencespatternpage.cpp
index d71a18c0b..9a3449653 100644
--- a/src/app/valentina/dialogs/configpages/preferencespatternpage.cpp
+++ b/src/app/valentina/dialogs/configpages/preferencespatternpage.cpp
@@ -52,7 +52,7 @@ PreferencesPatternPage::PreferencesPatternPage(QWidget *parent)
         QMessageBox::information(this, QCoreApplication::applicationName(), qsMsg);
     });
 
-    ui->defaultSeamAllowance->setValue(qApp->ValentinaSettings()->GetDefaultSeamAllowance());
+    InitDefaultSeamAllowance();
 
     ui->forbidFlippingCheck->setChecked(qApp->ValentinaSettings()->GetForbidWorkpieceFlipping());
     ui->doublePassmarkCheck->setChecked(qApp->ValentinaSettings()->IsDoublePassmark());
@@ -92,3 +92,10 @@ void PreferencesPatternPage::Apply()
         qApp->getCurrentDocument()->LiteParseTree(Document::LiteParse);
     }
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void PreferencesPatternPage::InitDefaultSeamAllowance()
+{
+    ui->defaultSeamAllowance->setValue(qApp->ValentinaSettings()->GetDefaultSeamAllowance());
+    ui->defaultSeamAllowance->setSuffix(UnitsToStr(StrToUnits(qApp->ValentinaSettings()->GetUnit()), true));
+}
diff --git a/src/app/valentina/dialogs/configpages/preferencespatternpage.h b/src/app/valentina/dialogs/configpages/preferencespatternpage.h
index a09cd6186..7d82c316d 100644
--- a/src/app/valentina/dialogs/configpages/preferencespatternpage.h
+++ b/src/app/valentina/dialogs/configpages/preferencespatternpage.h
@@ -45,6 +45,7 @@ public:
     virtual ~PreferencesPatternPage();
 
     void Apply();
+    void InitDefaultSeamAllowance();
 
 private:
     Q_DISABLE_COPY(PreferencesPatternPage)
diff --git a/src/app/valentina/dialogs/dialogpreferences.cpp b/src/app/valentina/dialogs/dialogpreferences.cpp
index 170b4b736..98cfdc16c 100644
--- a/src/app/valentina/dialogs/dialogpreferences.cpp
+++ b/src/app/valentina/dialogs/dialogpreferences.cpp
@@ -126,6 +126,8 @@ void DialogPreferences::Apply()
     m_patternPage->Apply();
     m_pathPage->Apply();
 
+    m_patternPage->InitDefaultSeamAllowance();
+
     qApp->ValentinaSettings()->GetOsSeparator() ? setLocale(QLocale()) : setLocale(QLocale::c());
     emit UpdateProperties();
     setResult(QDialog::Accepted);
diff --git a/src/libs/vmisc/vcommonsettings.cpp b/src/libs/vmisc/vcommonsettings.cpp
index df6ea666b..11a84390f 100644
--- a/src/libs/vmisc/vcommonsettings.cpp
+++ b/src/libs/vmisc/vcommonsettings.cpp
@@ -43,8 +43,6 @@
 #include "../vmisc/def.h"
 #include "../vmisc/vmath.h"
 #include "../vpatterndb/pmsystems.h"
-//#include "../ifc/xml/vdomdocument.h"
-
 
 const QString settingPathsIndividualMeasurements = QStringLiteral("paths/individual_measurements");
 const QString settingPathsStandardMeasurements   = QStringLiteral("paths/standard_measurements");
@@ -762,7 +760,7 @@ QChar VCommonSettings::GetDefCSVSeparator() const
 //---------------------------------------------------------------------------------------------------------------------
 void VCommonSettings::SetDefaultSeamAllowance(double value)
 {
-    setValue(settingPatternDefaultSeamAllowance, value);
+    setValue(settingPatternDefaultSeamAllowance, UnitConvertor(value, StrToUnits(GetUnit()), Unit::Cm));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -774,7 +772,7 @@ double VCommonSettings::GetDefaultSeamAllowance()
 {
     double defaultValue;
 
-    Unit globalUnit = StrToUnits(GetUnit());
+    const Unit globalUnit = StrToUnits(GetUnit());
 
     switch (globalUnit)
     {
@@ -791,15 +789,24 @@ double VCommonSettings::GetDefaultSeamAllowance()
     }
 
     bool ok = false;
-    double val = value(settingPatternDefaultSeamAllowance, defaultValue).toDouble(&ok);
+    double val = value(settingPatternDefaultSeamAllowance, -1).toDouble(&ok);
     if (ok == false)
     {
         qDebug()<< "Could not convert value"<<value(settingPatternDefaultSeamAllowance, 0)
-                << "to int. Return default value for default seam allowance is "
+                << "to real. Return default value for default seam allowance is "
                 << defaultValue << ".";
         val = defaultValue;
     }
 
+    if (val < 0)
+    {
+        val = defaultValue;
+    }
+    else
+    {
+        val = UnitConvertor(val, Unit::Cm, globalUnit);
+    }
+
     return val;
 }
 
diff --git a/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp b/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp
index daa09450c..6585d4ff4 100644
--- a/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp
+++ b/src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp
@@ -2526,13 +2526,8 @@ void DialogSeamAllowance::InitSeamAllowanceTab()
     connect(uiTabPaths->checkBoxSeams, &QCheckBox::toggled, this, &DialogSeamAllowance::EnableSeamAllowance);
 
     // init the default seam allowance, convert the value if app unit is different than pattern unit
-    m_saWidth = qApp->Settings()->GetDefaultSeamAllowance();
-    Unit defaultUnit = StrToUnits(qApp->Settings()->GetUnit());
-    Unit patternUnit = qApp->patternUnit();
-    if(defaultUnit != patternUnit)
-    {
-        m_saWidth = UnitConvertor(m_saWidth, defaultUnit, patternUnit);
-    }
+    m_saWidth = UnitConvertor(qApp->Settings()->GetDefaultSeamAllowance(),
+                              StrToUnits(qApp->Settings()->GetUnit()), qApp->patternUnit());
 
     uiTabPaths->plainTextEditFormulaWidth->setPlainText(qApp->LocaleToString(m_saWidth));