diff --git a/cpp/src/Stopwatch.cpp b/cpp/src/Stopwatch.cpp
new file mode 100644
index 0000000..522965b
--- /dev/null
+++ b/cpp/src/Stopwatch.cpp
@@ -0,0 +1,20 @@
+#include "ctre/phoenix/Stopwatch.h"
+
+namespace ctre {
+namespace phoenix {
+
+void Stopwatch::Start(){
+	_t0 = (float)clock();
+}
+unsigned int Stopwatch::DurationMs(){
+	return Stopwatch::Duration() * 1000;
+}
+float Stopwatch::Duration(){
+	_t1 = (float)clock();
+	long retval = _t1 - _t0;
+	if(retval < 0) retval = 0;
+	return retval * _scalar;
+}
+
+} // namespace phoenix
+}