diff --git a/lasp/c/lasp_nprocs.c b/lasp/c/lasp_nprocs.c
new file mode 100644
index 0000000..706bec6
--- /dev/null
+++ b/lasp/c/lasp_nprocs.c
@@ -0,0 +1,18 @@
+#ifdef MS_WIN64
+#include <windows.h>
+#else
+// Used for obtaining the number of processors
+#include <sys/sysinfo.h>
+#endif
+#include "lasp_nprocs.h"
+
+us getNumberOfProcs() {
+#if MS_WIN64
+// https://stackoverflow.com/questions/150355/programmatically-find-the-number-of-cores-on-a-machine
+    SYSTEM_INFO sysinfo;
+    GetSystemInfo(&sysinfo);
+    return sysinfo.dwNumberOfProcessors;
+#else
+	return get_nprocs();
+#endif
+}
\ No newline at end of file
diff --git a/lasp/c/lasp_nprocs.h b/lasp/c/lasp_nprocs.h
new file mode 100644
index 0000000..7ba5458
--- /dev/null
+++ b/lasp/c/lasp_nprocs.h
@@ -0,0 +1,18 @@
+// lasp_nprocs.h
+//
+// Author: J.A. de Jong - ASCEE
+//
+// Description: Implemententation of a function to determine the number
+// of processors.
+//////////////////////////////////////////////////////////////////////
+#pragma once
+#ifndef LASP_NPROCS_H
+#define LASP_NPROCS_H
+#include "lasp_types.h"
+
+/** 
+ * @return The number of SMP processors
+ */
+us getNumberOfProcs();
+
+#endif // LASP_NPROCS_H
\ No newline at end of file