diff --git a/core/io/file_access_compressed.cpp b/core/io/file_access_compressed.cpp
index e54c947340b..df631053b80 100644
--- a/core/io/file_access_compressed.cpp
+++ b/core/io/file_access_compressed.cpp
@@ -233,7 +233,7 @@ uint64_t FileAccessCompressed::get_position() const {
 	if (writing) {
 		return write_pos;
 	} else {
-		return read_block * block_size + read_pos;
+		return (uint64_t)read_block * block_size + read_pos;
 	}
 }
 
diff --git a/core/io/file_access_zip.cpp b/core/io/file_access_zip.cpp
index b5c882e9ce5..53bf7456e62 100644
--- a/core/io/file_access_zip.cpp
+++ b/core/io/file_access_zip.cpp
@@ -99,7 +99,7 @@ static int godot_testerror(voidpf opaque, voidpf stream) {
 }
 
 static voidpf godot_alloc(voidpf opaque, uInt items, uInt size) {
-	return memalloc(items * size);
+	return memalloc((size_t)items * size);
 }
 
 static void godot_free(voidpf opaque, voidpf address) {
diff --git a/core/io/zip_io.cpp b/core/io/zip_io.cpp
index fb4c76aa7af..24808cc8d6d 100644
--- a/core/io/zip_io.cpp
+++ b/core/io/zip_io.cpp
@@ -100,7 +100,7 @@ int zipio_testerror(voidpf opaque, voidpf stream) {
 }
 
 voidpf zipio_alloc(voidpf opaque, uInt items, uInt size) {
-	voidpf ptr = memalloc(items * size);
+	voidpf ptr = memalloc((size_t)items * size);
 	memset(ptr, 0, items * size);
 	return ptr;
 }
diff --git a/main/main.cpp b/main/main.cpp
index 5a2a088494b..3cc7923cc26 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -2488,17 +2488,17 @@ bool Main::iteration() {
 
 	iterating++;
 
-	uint64_t ticks = OS::get_singleton()->get_ticks_usec();
+	const uint64_t ticks = OS::get_singleton()->get_ticks_usec();
 	Engine::get_singleton()->_frame_ticks = ticks;
 	main_timer_sync.set_cpu_ticks_usec(ticks);
 	main_timer_sync.set_fixed_fps(fixed_fps);
 
-	uint64_t ticks_elapsed = ticks - last_ticks;
+	const uint64_t ticks_elapsed = ticks - last_ticks;
 
-	int physics_ticks_per_second = Engine::get_singleton()->get_physics_ticks_per_second();
-	float physics_step = 1.0 / physics_ticks_per_second;
+	const int physics_ticks_per_second = Engine::get_singleton()->get_physics_ticks_per_second();
+	const double physics_step = 1.0 / physics_ticks_per_second;
 
-	float time_scale = Engine::get_singleton()->get_time_scale();
+	const double time_scale = Engine::get_singleton()->get_time_scale();
 
 	MainFrameTime advance = main_timer_sync.advance(physics_step, physics_ticks_per_second);
 	double process_step = advance.process_step;
diff --git a/modules/hdr/image_loader_hdr.cpp b/modules/hdr/image_loader_hdr.cpp
index 9d6a399eff3..32a31aa764e 100644
--- a/modules/hdr/image_loader_hdr.cpp
+++ b/modules/hdr/image_loader_hdr.cpp
@@ -65,7 +65,7 @@ Error ImageLoaderHDR::load_image(Ref<Image> p_image, FileAccess *f, bool p_force
 
 	Vector<uint8_t> imgdata;
 
-	imgdata.resize(height * width * sizeof(uint32_t));
+	imgdata.resize(height * width * (int)sizeof(uint32_t));
 
 	{
 		uint8_t *w = imgdata.ptrw();
@@ -75,7 +75,7 @@ Error ImageLoaderHDR::load_image(Ref<Image> p_image, FileAccess *f, bool p_force
 		if (width < 8 || width >= 32768) {
 			// Read flat data
 
-			f->get_buffer(ptr, width * height * 4);
+			f->get_buffer(ptr, (uint64_t)width * height * 4);
 		} else {
 			// Read RLE-encoded data
 
diff --git a/modules/minimp3/audio_stream_mp3.cpp b/modules/minimp3/audio_stream_mp3.cpp
index 7b52ef178a3..17ce051b67a 100644
--- a/modules/minimp3/audio_stream_mp3.cpp
+++ b/modules/minimp3/audio_stream_mp3.cpp
@@ -112,7 +112,7 @@ void AudioStreamPlaybackMP3::seek(float p_time) {
 	}
 
 	frames_mixed = uint32_t(mp3_stream->sample_rate * p_time);
-	mp3dec_ex_seek(mp3d, frames_mixed * mp3_stream->channels);
+	mp3dec_ex_seek(mp3d, (uint64_t)frames_mixed * mp3_stream->channels);
 }
 
 AudioStreamPlaybackMP3::~AudioStreamPlaybackMP3() {
diff --git a/platform/javascript/audio_driver_javascript.cpp b/platform/javascript/audio_driver_javascript.cpp
index cfe6c69072c..626aef3c609 100644
--- a/platform/javascript/audio_driver_javascript.cpp
+++ b/platform/javascript/audio_driver_javascript.cpp
@@ -117,14 +117,15 @@ Error AudioDriverJavaScript::init() {
 	if (output_rb) {
 		memdelete_arr(output_rb);
 	}
-	output_rb = memnew_arr(float, buffer_length *channel_count);
+	const size_t array_size = buffer_length * (size_t)channel_count;
+	output_rb = memnew_arr(float, array_size);
 	if (!output_rb) {
 		return ERR_OUT_OF_MEMORY;
 	}
 	if (input_rb) {
 		memdelete_arr(input_rb);
 	}
-	input_rb = memnew_arr(float, buffer_length *channel_count);
+	input_rb = memnew_arr(float, array_size);
 	if (!input_rb) {
 		return ERR_OUT_OF_MEMORY;
 	}
diff --git a/scene/2d/parallax_layer.cpp b/scene/2d/parallax_layer.cpp
index 67e35cc7a3e..797e2e59cb0 100644
--- a/scene/2d/parallax_layer.cpp
+++ b/scene/2d/parallax_layer.cpp
@@ -123,12 +123,12 @@ void ParallaxLayer::set_base_offset_and_scale(const Point2 &p_offset, real_t p_s
 	Point2 new_ofs = (screen_offset + (p_offset - screen_offset) * motion_scale) + motion_offset * p_scale + orig_offset * p_scale;
 
 	if (mirroring.x) {
-		double den = mirroring.x * p_scale;
+		real_t den = mirroring.x * p_scale;
 		new_ofs.x -= den * ceil(new_ofs.x / den);
 	}
 
 	if (mirroring.y) {
-		double den = mirroring.y * p_scale;
+		real_t den = mirroring.y * p_scale;
 		new_ofs.y -= den * ceil(new_ofs.y / den);
 	}
 
diff --git a/scene/3d/gpu_particles_collision_3d.cpp b/scene/3d/gpu_particles_collision_3d.cpp
index 4fa34615bfb..9127168c580 100644
--- a/scene/3d/gpu_particles_collision_3d.cpp
+++ b/scene/3d/gpu_particles_collision_3d.cpp
@@ -475,7 +475,7 @@ Ref<Image> GPUParticlesCollisionSDF::bake() {
 	_create_bvh(bvh, face_pos.ptr(), face_pos.size(), faces.ptr(), th);
 
 	Vector<uint8_t> data;
-	data.resize(sdf_size.z * sdf_size.y * sdf_size.x * sizeof(float));
+	data.resize(sdf_size.z * sdf_size.y * sdf_size.x * (int)sizeof(float));
 
 	if (bake_step_function) {
 		bake_step_function(0, "Baking SDF");
diff --git a/servers/audio/audio_driver_dummy.cpp b/servers/audio/audio_driver_dummy.cpp
index a28dcb10157..47799dce962 100644
--- a/servers/audio/audio_driver_dummy.cpp
+++ b/servers/audio/audio_driver_dummy.cpp
@@ -46,7 +46,7 @@ Error AudioDriverDummy::init() {
 	int latency = GLOBAL_GET("audio/driver/output_latency");
 	buffer_frames = closest_power_of_2(latency * mix_rate / 1000);
 
-	samples_in = memnew_arr(int32_t, buffer_frames * channels);
+	samples_in = memnew_arr(int32_t, (size_t)buffer_frames * channels);
 
 	thread.start(AudioDriverDummy::thread_func, this);
 
diff --git a/servers/audio/audio_rb_resampler.cpp b/servers/audio/audio_rb_resampler.cpp
index 3c8a1469cdc..d9c442facfc 100644
--- a/servers/audio/audio_rb_resampler.cpp
+++ b/servers/audio/audio_rb_resampler.cpp
@@ -176,8 +176,9 @@ Error AudioRBResampler::setup(int p_channels, int p_src_mix_rate, int p_target_m
 		rb_bits = desired_rb_bits;
 		rb_len = (1 << rb_bits);
 		rb_mask = rb_len - 1;
-		rb = memnew_arr(float, rb_len *p_channels);
-		read_buf = memnew_arr(float, rb_len *p_channels);
+		const size_t array_size = rb_len * (size_t)p_channels;
+		rb = memnew_arr(float, array_size);
+		read_buf = memnew_arr(float, array_size);
 	}
 
 	src_mix_rate = p_src_mix_rate;
diff --git a/servers/rendering/renderer_rd/renderer_storage_rd.cpp b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
index 45d3b3f09fa..2ece60e1078 100644
--- a/servers/rendering/renderer_rd/renderer_storage_rd.cpp
+++ b/servers/rendering/renderer_rd/renderer_storage_rd.cpp
@@ -3959,7 +3959,7 @@ void RendererStorageRD::_multimesh_make_local(MultiMesh *multimesh) const {
 				memcpy(w, r, buffer.size());
 			}
 		} else {
-			memset(w, 0, multimesh->instances * multimesh->stride_cache * sizeof(float));
+			memset(w, 0, (size_t)multimesh->instances * multimesh->stride_cache * sizeof(float));
 		}
 	}
 	uint32_t data_cache_dirty_region_count = (multimesh->instances - 1) / MULTIMESH_DIRTY_REGION_SIZE + 1;
@@ -4372,13 +4372,13 @@ void RendererStorageRD::_update_dirty_multimeshes() {
 
 				if (multimesh->data_cache_used_dirty_regions > 32 || multimesh->data_cache_used_dirty_regions > visible_region_count / 2) {
 					//if there too many dirty regions, or represent the majority of regions, just copy all, else transfer cost piles up too much
-					RD::get_singleton()->buffer_update(multimesh->buffer, 0, MIN(visible_region_count * region_size, multimesh->instances * multimesh->stride_cache * sizeof(float)), data);
+					RD::get_singleton()->buffer_update(multimesh->buffer, 0, MIN(visible_region_count * region_size, multimesh->instances * (uint32_t)multimesh->stride_cache * (uint32_t)sizeof(float)), data);
 				} else {
 					//not that many regions? update them all
 					for (uint32_t i = 0; i < visible_region_count; i++) {
 						if (multimesh->data_cache_dirty_regions[i]) {
-							uint64_t offset = i * region_size;
-							uint64_t size = multimesh->stride_cache * multimesh->instances * sizeof(float);
+							uint32_t offset = i * region_size;
+							uint32_t size = multimesh->stride_cache * (uint32_t)multimesh->instances * (uint32_t)sizeof(float);
 							RD::get_singleton()->buffer_update(multimesh->buffer, offset, MIN(region_size, size - offset), &data[i * region_size]);
 						}
 					}