diff --git a/Core/HLE/HLE.cpp b/Core/HLE/HLE.cpp
index 7bdf11e4f0..3e68432aa9 100644
--- a/Core/HLE/HLE.cpp
+++ b/Core/HLE/HLE.cpp
@@ -481,7 +481,7 @@ const HLEFunction *GetSyscallInfo(MIPSOpcode op)
 		ERROR_LOG(HLE, "Unknown syscall: Module: %s", modulenum > (int) moduleDB.size() ? "(unknown)" : moduleDB[modulenum].name); 
 		return NULL;
 	}
-	if (modulenum >= moduleDB.size()) {
+	if (modulenum >= (int)moduleDB.size()) {
 		ERROR_LOG(HLE, "Syscall had bad module number %i - probably executing garbage", modulenum);
 		return NULL;
 	}
diff --git a/UI/ControlMappingScreen.cpp b/UI/ControlMappingScreen.cpp
index 719a71e82f..9db228d193 100644
--- a/UI/ControlMappingScreen.cpp
+++ b/UI/ControlMappingScreen.cpp
@@ -271,7 +271,7 @@ void ControlMappingScreen::dialogFinished(const Screen *dialog, DialogResult res
 }
 
 void ControlMappingScreen::KeyMapped(int pspkey) {  // Notification to let us refocus the same one after recreating views.
-	for (int i = 0; i < mappers_.size(); i++) {
+	for (size_t i = 0; i < mappers_.size(); i++) {
 		if (mappers_[i]->GetPspKey() == pspkey)
 			SetFocusedView(mappers_[i]);
 	}
diff --git a/UI/TiltEventProcessor.cpp b/UI/TiltEventProcessor.cpp
index 82ccf7a30f..60cae2c9d6 100644
--- a/UI/TiltEventProcessor.cpp
+++ b/UI/TiltEventProcessor.cpp
@@ -28,7 +28,7 @@ inline Tilt dampTilt(const Tilt &tilt, float deadzone, float xSensitivity, float
 	//multiply sensitivity by 2 so that "overshoot" is possible. I personally prefer a
 	//sensitivity >1 for kingdom hearts and < 1 for Gods Eater. so yes, overshoot is nice
 	//to have. 
-	return Tilt(tiltInputCurve(tilt.x_, deadzone, 2.0 * xSensitivity), tiltInputCurve(tilt.y_, deadzone, 2.0 * ySensitivity));
+	return Tilt(tiltInputCurve(tilt.x_, deadzone, 2.0f * xSensitivity), tiltInputCurve(tilt.y_, deadzone, 2.0f * ySensitivity));
 }
 
 inline float clamp(float f) {
@@ -44,7 +44,7 @@ Tilt TiltEventProcessor::NormalizeTilt(const Tilt &tilt){
 		// Values are in metres per second. Divide by 9.8 to get 'g' value
 		float maxX = 9.8f, maxY = 9.8f;
 	#else
-		float maxX = 1.0, maxY = 1.0;
+		float maxX = 1.0f, maxY = 1.0f;
 	#endif
 
 	return Tilt(tilt.x_ / maxX, tilt.y_ / maxY);
@@ -58,11 +58,11 @@ Tilt TiltEventProcessor::GenTilt(const Tilt &baseTilt, const Tilt &currentTilt,
 
 	//invert x and y axes if needed
 	if (invertX) {
-		transformedTilt.x_ *= -1.0;
+		transformedTilt.x_ *= -1.0f;
 	}
 
 	if (invertY) {
-		transformedTilt.y_ *= -1.0;
+		transformedTilt.y_ *= -1.0f;
 	}
 
 	//next, normalize the tilt values
@@ -98,7 +98,7 @@ void TiltEventProcessor::GenerateDPadEvent(const Tilt &tilt) {
 	}
 
 	int ctrlMask = 0;
-	int direction = (int)(floorf((atan2f(tilt.y_, tilt.x_) / (2 * M_PI) * 8) + 0.5f)) & 7;
+	int direction = (int)(floorf((atan2f(tilt.y_, tilt.x_) / (2.0f * (float)M_PI) * 8.0f) + 0.5f)) & 7;
 	switch (direction) {
 	case 0: ctrlMask |= CTRL_RIGHT; break;
 	case 1: ctrlMask |= CTRL_RIGHT | CTRL_DOWN; break;
@@ -135,7 +135,7 @@ void TiltEventProcessor::GenerateActionButtonEvent(const Tilt &tilt) {
 		return;
 	}
 
-	int direction = (int)(floorf((atan2f(tilt.y_, tilt.x_) / (2 * M_PI) * 4) + 0.5f)) & 3;
+	int direction = (int)(floorf((atan2f(tilt.y_, tilt.x_) / (2.0f * (float)M_PI) * 4.0f) + 0.5f)) & 3;
 	__CtrlButtonDown(buttons[direction]);
 }; 
 
diff --git a/Windows/DinputDevice.cpp b/Windows/DinputDevice.cpp
index 774820a656..3050518dd2 100644
--- a/Windows/DinputDevice.cpp
+++ b/Windows/DinputDevice.cpp
@@ -149,7 +149,7 @@ DinputDevice::DinputDevice(int devnum) {
 	}
 
 	getDevices();
-	if ( (devnum >= devices.size()) || FAILED(getPDI()->CreateDevice(devices.at(devnum).guidInstance, &pJoystick, NULL)))
+	if ( (devnum >= (int)devices.size()) || FAILED(getPDI()->CreateDevice(devices.at(devnum).guidInstance, &pJoystick, NULL)))
 	{
 		return;
 	}
diff --git a/Windows/GEDebugger/VertexPreview.cpp b/Windows/GEDebugger/VertexPreview.cpp
index bfd07c9746..9c1085f0bb 100644
--- a/Windows/GEDebugger/VertexPreview.cpp
+++ b/Windows/GEDebugger/VertexPreview.cpp
@@ -189,7 +189,7 @@ void CGEDebugger::UpdatePrimPreview(u32 op) {
 	};
 
 	Matrix4x4 ortho;
-	ortho.setOrtho(-(int)gstate_c.cutRTOffsetX, (frameWindow->TexWidth() - (int)gstate_c.cutRTOffsetX) * scale[0], frameWindow->TexHeight() * scale[1], 0, -1, 1);
+	ortho.setOrtho(-(float)gstate_c.cutRTOffsetX, (frameWindow->TexWidth() - (int)gstate_c.cutRTOffsetX) * scale[0], frameWindow->TexHeight() * scale[1], 0, -1, 1);
 	glUniformMatrix4fv(previewProgram->u_viewproj, 1, GL_FALSE, ortho.getReadPtr());
 	glEnableVertexAttribArray(previewProgram->a_position);
 	glVertexAttribPointer(previewProgram->a_position, 3, GL_FLOAT, GL_FALSE, sizeof(GPUDebugVertex), (float *)vertices.data() + 2);