diff --git a/source/armos/app/runner.d b/source/armos/app/runner.d
index 0e845e0..cd7d633 100644
--- a/source/armos/app/runner.d
+++ b/source/armos/app/runner.d
@@ -39,9 +39,19 @@ class Loop {
         /++
             FPS(Frame Per Second)を指定します．
         +/
-        void targetFps(double fps){
+        void targetFps(in double fps){
             fpscounter.targetFps = fps;
         }
+        
+        ///
+        double targetFps()const{
+            return fpscounter.targetFps;
+        }
+        
+        ///
+        double currentFps()const{
+            return fpscounter.currentFps;
+        }
     }//public
 
     private{
@@ -117,6 +127,14 @@ double fpsUseRate(){
 /++
     FPS(Frame Per Second)を指定します．
 +/
-void targetFps(double fps){
+void targetFps(in double fps){
     mainLoop.targetFps(fps);
 }
+
+double targetFps(){
+    return mainLoop.targetFps;
+}
+
+double currentFps(){
+    return mainLoop.currentFps;
+}
diff --git a/source/armos/utils/fpscounter.d b/source/armos/utils/fpscounter.d
index b46b2ca..a0647b3 100644
--- a/source/armos/utils/fpscounter.d
+++ b/source/armos/utils/fpscounter.d
@@ -13,7 +13,8 @@ class FpsCounter {
 
         void targetFps(in double fps){
             _targetFps = fps;
-            _targetTime = convertedTimeFromFps(fps);
+            //convert from fps to nsecs
+            _targetNsecsTime = (1.0/fps*1000000000.0).to!int;
         }
 
         double targetFps()const{
@@ -39,14 +40,14 @@ class FpsCounter {
 
         void adjust(){
             immutable MonoTime after = MonoTime.currTime;
-            immutable def = ( after - _timer );
-            if( def.split.hnsecs < _targetTime){
-                Thread.sleep( dur!("hnsecs")( _targetTime - def.split.hnsecs ) );
+            immutable def = ( after.ticks - _timer.ticks ).ticksToNSecs;
+            if( def < _targetNsecsTime){
+                Thread.sleep( dur!("nsecs")( _targetNsecsTime - def ) );
             }
             immutable after2 = MonoTime.currTime;
-            immutable def2 = after2 - _timer;
-            _currentFps = 1.0/def2.split.hnsecs.to!double*10000000.0;
-            _fpsUseRate = def.split.hnsecs.to!double/_targetTime.to!double;
+            immutable def2 = ( after2.ticks - _timer.ticks ).ticksToNSecs;
+            _currentFps = 1.0/def2.to!double*1000000000.0;
+            _fpsUseRate = def.to!double/_targetNsecsTime.to!double;
         }
     }
 
@@ -54,14 +55,10 @@ class FpsCounter {
         double _targetFps = 60.0;
         double _currentFps = 60.0;
         ulong  _currentFrames = 0;
-        int _targetTime = 0;
+        int    _targetNsecsTime = 0;
         double _fpsUseRate = 0;
         MonoTime _timer;
 
     }
 }
 
-private int convertedTimeFromFps(in double fps){
-    return (1.0/fps*10000000.0).to!int;
-}
-