diff --git a/include/osg/Timer b/include/osg/Timer
index 1261cce92..7b1a0278f 100644
--- a/include/osg/Timer
+++ b/include/osg/Timer
@@ -102,11 +102,30 @@ class ElapsedTime
             _startTick = _timer->tick();
         }
 
+        /** elapsed time in seconds. */
         inline double elapsedTime() const
         {
             return _timer->delta_s(_startTick, _timer->tick());
         }
 
+        /** elapsed time in milliseconds. */
+        inline double elapsedTime_m() const
+        {
+            return _timer->delta_m(_startTick, _timer->tick());
+        }
+
+        /** elapsed time in microseconds. */
+        inline double elapsedTime_u() const
+        {
+            return _timer->delta_u(_startTick, _timer->tick());
+        }
+
+        /** elapsed time in nanoseconds. */
+        inline double elapsedTime_n() const
+        {
+            return _timer->delta_n(_startTick, _timer->tick());
+        }
+
         inline void finish()
         {
             Timer_t endTick = _timer->tick();