diff --git a/dll/ntdll/rtl/libsupp.c b/dll/ntdll/rtl/libsupp.c
index 5599c7f6501..7dc1abc1d59 100644
--- a/dll/ntdll/rtl/libsupp.c
+++ b/dll/ntdll/rtl/libsupp.c
@@ -1225,10 +1225,8 @@ RtlGetTickCount(VOID)
 
     TickCount = KiReadSystemTime(&SharedUserData->TickCount);
 
-    return (ULONG)((UInt32x32To64(TickCount.LowPart,
-                                  SharedUserData->TickCountMultiplier) >> 24) +
-                    UInt32x32To64((TickCount.HighPart << 8) & 0xFFFFFFFF,
-                                  SharedUserData->TickCountMultiplier));
+    /* Convert to milliseconds */
+    return KiTickCountToMs(TickCount);
 }
 
 /* EOF */
diff --git a/dll/win32/kernel32/client/time.c b/dll/win32/kernel32/client/time.c
index f21d4c0cc20..4047720de5f 100644
--- a/dll/win32/kernel32/client/time.c
+++ b/dll/win32/kernel32/client/time.c
@@ -426,11 +426,8 @@ GetTickCount(VOID)
 
     TickCount = KiReadSystemTime(&SharedUserData->TickCount);
 
-    return (ULONG)((UInt32x32To64(TickCount.LowPart,
-                                  SharedUserData->TickCountMultiplier) >> 24) +
-                    UInt32x32To64((TickCount.HighPart << 8) & 0xFFFFFFFF,
-                                  SharedUserData->TickCountMultiplier));
-
+    /* Convert to milliseconds */
+    return (DWORD)KiTickCountToMs(TickCount);
 }
 
 /*
diff --git a/dll/win32/kernel32/kernel32_vista/GetTickCount64.c b/dll/win32/kernel32/kernel32_vista/GetTickCount64.c
index bc185143721..8a8346e59fd 100644
--- a/dll/win32/kernel32/kernel32_vista/GetTickCount64.c
+++ b/dll/win32/kernel32/kernel32_vista/GetTickCount64.c
@@ -12,7 +12,6 @@ GetTickCount64(VOID)
 
     TickCount = KiReadSystemTime(&SharedUserData->TickCount);
 
-    ULONG TickCountMultiplier = SharedUserData->TickCountMultiplier;
-    return (UInt32x32To64(TickCount.LowPart, TickCountMultiplier) >> 24) +
-           (UInt32x32To64(TickCount.HighPart, TickCountMultiplier) << 8);
+    /* Convert to milliseconds */
+    return KiTickCountToMs(TickCount);
 }
diff --git a/sdk/include/ndk/kefuncs.h b/sdk/include/ndk/kefuncs.h
index 30ed841d519..997415624a5 100644
--- a/sdk/include/ndk/kefuncs.h
+++ b/sdk/include/ndk/kefuncs.h
@@ -447,6 +447,22 @@ KiWriteSystemTime(
 }
 
 #endif // !NTOS_MODE_USER
+
+FORCEINLINE
+ULONG64
+KiTickCountToMs(_In_ LARGE_INTEGER TickCount)
+{
+#ifdef _WIN64
+    /* Native math is optimal on 64 bit */
+    return (TickCount.QuadPart * SharedUserData->TickCountMultiplier) >> 24;
+#else
+    /* This is optimal on 32 bit (overflows after ~20,000 years) */
+    ULONG Multiplier = SharedUserData->TickCountMultiplier;
+    return (UInt32x32To64(TickCount.LowPart, Multiplier) >> 24) +
+            UInt32x32To64(TickCount.HighPart << 8, Multiplier);
+#endif
+}
+
 #endif // !NONAMELESSUNION
 
 //
diff --git a/win32ss/gdi/eng/engmisc.c b/win32ss/gdi/eng/engmisc.c
index 73ef8744af7..97be53b9bf4 100644
--- a/win32ss/gdi/eng/engmisc.c
+++ b/win32ss/gdi/eng/engmisc.c
@@ -287,16 +287,13 @@ ULONGLONG
 APIENTRY
 EngGetTickCount(VOID)
 {
-    ULONG Multiplier;
     LARGE_INTEGER TickCount;
 
-    /* Get the multiplier and current tick count */
+    /* Get the current tick count */
     KeQueryTickCount(&TickCount);
-    Multiplier = SharedUserData->TickCountMultiplier;
 
-    /* Convert to milliseconds and return */
-    return (Int64ShrlMod32(UInt32x32To64(Multiplier, TickCount.LowPart), 24) +
-            (Multiplier * (TickCount.HighPart << 8)));
+    /* Convert to milliseconds */
+    return KiTickCountToMs(TickCount);
 }
 
 /* EOF */