diff --git a/QtAndroidTools/CMakeLists.txt b/QtAndroidTools/CMakeLists.txt
index bac011e..c96a9d9 100644
--- a/QtAndroidTools/CMakeLists.txt
+++ b/QtAndroidTools/CMakeLists.txt
@@ -54,6 +54,7 @@ if(QTAT_SYSTEM)
 	add_compile_definitions(QTAT_SYSTEM)
 	list(APPEND QTAT_SOURCE_FILES QAndroidSystem.cpp)
 	list(APPEND QTAT_HEADER_FILES QAndroidSystem.h)
+	list(APPEND QTAT_JAVA_FILES ${QTAT_JAVA_DIR}/AndroidSystem.java)
 endif()
 
 option(QTAT_APK_EXPANSION_FILES "Enable QtAndroidTools Apk Expansion.")
diff --git a/QtAndroidTools/QAndroidSystem.cpp b/QtAndroidTools/QAndroidSystem.cpp
index 31f0f18..0f0fff8 100644
--- a/QtAndroidTools/QAndroidSystem.cpp
+++ b/QtAndroidTools/QAndroidSystem.cpp
@@ -25,7 +25,9 @@
 
 QAndroidSystem *QAndroidSystem::m_pInstance = nullptr;
 
-QAndroidSystem::QAndroidSystem()
+QAndroidSystem::QAndroidSystem() : m_javaSystem("com/falsinsoft/qtandroidtools/AndroidSystem",
+                                                "(Landroid/app/Activity;)V",
+                                                QtAndroid::androidActivity().object<jobject>())
 {
     m_pInstance = this;
     loadStandardPaths();
@@ -44,6 +46,33 @@ QAndroidSystem* QAndroidSystem::instance()
     return m_pInstance;
 }
 
+int QAndroidSystem::spToPx(float sp)
+{
+    if(m_javaSystem.isValid())
+    {
+        return m_javaSystem.callMethod<jint>("spToPx", "(F)I", sp);
+    }
+    return -1;
+}
+
+int QAndroidSystem::dipToPx(float dip)
+{
+    if(m_javaSystem.isValid())
+    {
+        return m_javaSystem.callMethod<jint>("dipToPx", "(F)I", dip);
+    }
+    return -1;
+}
+
+int QAndroidSystem::ptToPx(float pt)
+{
+    if(m_javaSystem.isValid())
+    {
+        return m_javaSystem.callMethod<jint>("ptToPx", "(F)I", pt);
+    }
+    return -1;
+}
+
 const QString& QAndroidSystem::getDataLocation() const
 {
     return m_standardPaths.dataLocation;
diff --git a/QtAndroidTools/QAndroidSystem.h b/QtAndroidTools/QAndroidSystem.h
index 523e29c..bef2dcf 100644
--- a/QtAndroidTools/QAndroidSystem.h
+++ b/QtAndroidTools/QAndroidSystem.h
@@ -44,6 +44,10 @@ public:
     static QObject* qmlInstance(QQmlEngine *engine, QJSEngine *scriptEngine);
     static QAndroidSystem* instance();
 
+    Q_INVOKABLE int spToPx(float sp);
+    Q_INVOKABLE int dipToPx(float dip);
+    Q_INVOKABLE int ptToPx(float pt);
+
     const QString& getDataLocation() const;
     const QString& getConfigLocation() const;
     const QString& getDownloadLocation() const;
@@ -52,6 +56,7 @@ public:
     const QString& getPicturesLocation() const;
 
 private:
+    const QAndroidJniObject m_javaSystem;
     static QAndroidSystem *m_pInstance;
 
     struct {
diff --git a/QtAndroidTools/QtAndroidTools.pri b/QtAndroidTools/QtAndroidTools.pri
index 7425d80..bd0967e 100644
--- a/QtAndroidTools/QtAndroidTools.pri
+++ b/QtAndroidTools/QtAndroidTools.pri
@@ -47,6 +47,12 @@ contains(DEFINES, QTAT_SCREEN) {
 contains(DEFINES, QTAT_SYSTEM) {
     HEADERS += $$PWD/QAndroidSystem.h
     SOURCES += $$PWD/QAndroidSystem.cpp
+    OTHER_FILES += $$PWD/src/com/falsinsoft/qtandroidtools/AndroidSystem.java
+    equals(COPY_JAVA_FILE, true) {
+        copy_system.commands = $(COPY_FILE) $$shell_path($$PWD/src/com/falsinsoft/qtandroidtools/AndroidSystem.java) $$shell_path($$ANDROID_PACKAGE_SOURCE_DIR/src/com/falsinsoft/qtandroidtools/)
+        PRE_TARGETDEPS += copy_system
+        QMAKE_EXTRA_TARGETS += copy_system
+    }
 }
 contains(DEFINES, QTAT_APK_EXPANSION_FILES) {
     HEADERS += $$PWD/QAndroidApkExpansionFiles.h
diff --git a/QtAndroidTools/src/com/falsinsoft/qtandroidtools/AndroidSystem.java b/QtAndroidTools/src/com/falsinsoft/qtandroidtools/AndroidSystem.java
new file mode 100644
index 0000000..7a21a94
--- /dev/null
+++ b/QtAndroidTools/src/com/falsinsoft/qtandroidtools/AndroidSystem.java
@@ -0,0 +1,58 @@
+/*
+ *	MIT License
+ *
+ *	Copyright (c) 2018 Fabio Falsini <falsinsoft@gmail.com>
+ *
+ *	Permission is hereby granted, free of charge, to any person obtaining a copy
+ *	of this software and associated documentation files (the "Software"), to deal
+ *	in the Software without restriction, including without limitation the rights
+ *	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *	copies of the Software, and to permit persons to whom the Software is
+ *	furnished to do so, subject to the following conditions:
+ *
+ *	The above copyright notice and this permission notice shall be included in all
+ *	copies or substantial portions of the Software.
+ *
+ *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *	SOFTWARE.
+ */
+
+ package com.falsinsoft.qtandroidtools;
+
+ import android.content.Context;
+ import android.app.Activity;
+ import android.content.Intent;
+ import android.net.Uri;
+ import android.util.Log;
+ import android.util.TypedValue;
+
+ public class AndroidSystem
+ {
+    private static final String TAG = "AndroidSystem";
+    private final Activity mActivityInstance;
+
+    public AndroidSystem(Activity activityInstance)
+    {
+        mActivityInstance = activityInstance;
+    }
+	
+    public int spToPx(float sp)
+    {
+        return (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, sp, mActivityInstance.getResources().getDisplayMetrics());
+    }
+
+    public int dipToPx(float dip)
+    {
+        return (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dip, mActivityInstance.getResources().getDisplayMetrics());
+    }
+
+    public int ptToPx(float pt)
+    {
+        return (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PT, pt, mActivityInstance.getResources().getDisplayMetrics());
+    }
+}