diff --git a/intern/cycles/bvh/bvh_build.cpp b/intern/cycles/bvh/bvh_build.cpp
index 8dbd5abc183..87a889955fe 100644
--- a/intern/cycles/bvh/bvh_build.cpp
+++ b/intern/cycles/bvh/bvh_build.cpp
@@ -328,11 +328,11 @@ BVHNode* BVHBuild::run()
 			VLOG(1) << "BVH build statistics:\n"
 			        << "  Build time: " << time_dt() - build_start_time << "\n"
 			        << "  Total number of nodes: "
-			        << rootnode->getSubtreeSize(BVH_STAT_NODE_COUNT) << "\n"
+			        << string_human_readable_number(rootnode->getSubtreeSize(BVH_STAT_NODE_COUNT)) << "\n"
 			        << "  Number of inner nodes: "
-			        << rootnode->getSubtreeSize(BVH_STAT_INNER_COUNT)  << "\n"
+			        << string_human_readable_number(rootnode->getSubtreeSize(BVH_STAT_INNER_COUNT)) << "\n"
 			        << "  Number of leaf nodes: "
-			        << rootnode->getSubtreeSize(BVH_STAT_LEAF_COUNT)  << "\n"
+			        << string_human_readable_number(rootnode->getSubtreeSize(BVH_STAT_LEAF_COUNT)) << "\n"
 			        << "  Allocation slop factor: "
 			               << ((prim_type.capacity() != 0)
 			                       ? (float)prim_type.size() / prim_type.capacity()
diff --git a/intern/cycles/device/device_cpu.cpp b/intern/cycles/device/device_cpu.cpp
index 275ee028eb4..aed86d8d853 100644
--- a/intern/cycles/device/device_cpu.cpp
+++ b/intern/cycles/device/device_cpu.cpp
@@ -155,7 +155,9 @@ public:
 	               InterpolationType interpolation,
 	               ExtensionType extension)
 	{
-		VLOG(1) << "Texture allocate: " << name << ", " << mem.memory_size() << " bytes.";
+		VLOG(1) << "Texture allocate: " << name << ", "
+		        << string_human_readable_number(mem.memory_size()) << " bytes. ("
+		        << string_human_readable_size(mem.memory_size()) << ")";
 		kernel_tex_copy(&kernel_globals,
 		                name,
 		                mem.data_pointer,
diff --git a/intern/cycles/device/device_cuda.cpp b/intern/cycles/device/device_cuda.cpp
index 9a78d055580..d7ed7b4f853 100644
--- a/intern/cycles/device/device_cuda.cpp
+++ b/intern/cycles/device/device_cuda.cpp
@@ -493,7 +493,9 @@ public:
 	               InterpolationType interpolation,
 	               ExtensionType extension)
 	{
-		VLOG(1) << "Texture allocate: " << name << ", " << mem.memory_size() << " bytes.";
+		VLOG(1) << "Texture allocate: " << name << ", "
+		        << string_human_readable_number(mem.memory_size()) << " bytes. ("
+		        << string_human_readable_size(mem.memory_size()) << ")";
 
 		/* Check if we are on sm_30 or above.
 		 * We use arrays and bindles textures for storage there */
diff --git a/intern/cycles/device/device_multi.cpp b/intern/cycles/device/device_multi.cpp
index 434d0085d39..c4f8d9e16e0 100644
--- a/intern/cycles/device/device_multi.cpp
+++ b/intern/cycles/device/device_multi.cpp
@@ -175,7 +175,9 @@ public:
 	               interpolation,
 	               ExtensionType extension)
 	{
-		VLOG(1) << "Texture allocate: " << name << ", " << mem.memory_size() << " bytes.";
+		VLOG(1) << "Texture allocate: " << name << ", "
+		        << string_human_readable_number(mem.memory_size()) << " bytes. ("
+		        << string_human_readable_size(mem.memory_size()) << ")";
 
 		foreach(SubDevice& sub, devices) {
 			mem.device_pointer = 0;
diff --git a/intern/cycles/device/device_network.cpp b/intern/cycles/device/device_network.cpp
index cf4a05de8fc..3eb5ad2d2db 100644
--- a/intern/cycles/device/device_network.cpp
+++ b/intern/cycles/device/device_network.cpp
@@ -168,7 +168,9 @@ public:
 	               InterpolationType interpolation,
 	               ExtensionType extension)
 	{
-		VLOG(1) << "Texture allocate: " << name << ", " << mem.memory_size() << " bytes.";
+		VLOG(1) << "Texture allocate: " << name << ", "
+		        << string_human_readable_number(mem.memory_size()) << " bytes. ("
+		        << string_human_readable_size(mem.memory_size()) << ")";
 
 		thread_scoped_lock lock(rpc_lock);
 
diff --git a/intern/cycles/device/device_opencl.cpp b/intern/cycles/device/device_opencl.cpp
index 1b4e5421b5a..c7dcf7602df 100644
--- a/intern/cycles/device/device_opencl.cpp
+++ b/intern/cycles/device/device_opencl.cpp
@@ -1187,7 +1187,9 @@ public:
 	               InterpolationType /*interpolation*/,
 	               ExtensionType /*extension*/)
 	{
-		VLOG(1) << "Texture allocate: " << name << ", " << mem.memory_size() << " bytes.";
+		VLOG(1) << "Texture allocate: " << name << ", "
+		        << string_human_readable_number(mem.memory_size()) << " bytes. ("
+		        << string_human_readable_size(mem.memory_size()) << ")";
 		mem_alloc(mem, MEM_READ_ONLY);
 		mem_copy_to(mem);
 		assert(mem_map.find(name) == mem_map.end());
diff --git a/intern/cycles/render/scene.cpp b/intern/cycles/render/scene.cpp
index b0052c30af4..e8367e1eb36 100644
--- a/intern/cycles/render/scene.cpp
+++ b/intern/cycles/render/scene.cpp
@@ -242,9 +242,14 @@ void Scene::device_update(Device *device_, Progress& progress)
 	}
 
 	if(print_stats) {
+		size_t mem_used = util_guarded_get_mem_used();
+		size_t mem_peak = util_guarded_get_mem_peak();
+
 		VLOG(1) << "System memory statistics after full device sync:\n"
-		        << "  Usage: " << util_guarded_get_mem_used() << "\n"
-		        << "  Peak: " << util_guarded_get_mem_peak();
+		        << "  Usage: " << string_human_readable_number(mem_used)
+		        << " (" << string_human_readable_size(mem_used) << ")\n"
+		        << "  Peak: " << string_human_readable_number(mem_peak)
+		        << " (" << string_human_readable_size(mem_peak) << ")";
 	}
 }
 
diff --git a/intern/cycles/util/util_string.cpp b/intern/cycles/util/util_string.cpp
index b3a8c6d7c2e..e16a83d56d0 100644
--- a/intern/cycles/util/util_string.cpp
+++ b/intern/cycles/util/util_string.cpp
@@ -239,5 +239,45 @@ string string_to_ansi(const string& str)
 
 #endif  /* _WIN32 */
 
+string string_human_readable_size(size_t size)
+{
+	static const char suffixes[] = "BKMGTPEZY";
+
+	const char* suffix = suffixes;
+	size_t r = 0;
+
+	while(size >= 1024) {
+		r = size % 1024;
+		size /= 1024;
+		suffix++;
+	}
+
+	if(*suffix != 'B')
+		return string_printf("%.2f%c", double(size*1024+r)/1024.0, *suffix);
+	else
+		return string_printf("%zu", size);
+}
+
+string string_human_readable_number(size_t num)
+{
+	/* add thousands separators */
+	char buf[32];
+
+	char* p = buf+31;
+	*p = '\0';
+
+	int i = -1;
+	while(num) {
+		if(++i && i % 3 == 0)
+			*(--p) = ',';
+
+		*(--p) = '0' + (num % 10);
+
+		num /= 10;
+	}
+
+	return p;
+}
+
 CCL_NAMESPACE_END
 
diff --git a/intern/cycles/util/util_string.h b/intern/cycles/util/util_string.h
index c4b51bda432..d3b5248c380 100644
--- a/intern/cycles/util/util_string.h
+++ b/intern/cycles/util/util_string.h
@@ -62,6 +62,11 @@ string string_from_wstring(const wstring& path);
 string string_to_ansi(const string& str);
 #endif
 
+/* Make a string from a size in bytes in human readable form */
+string string_human_readable_size(size_t size);
+/* Make a string from a unitless quantity in human readable form */
+string string_human_readable_number(size_t num);
+
 CCL_NAMESPACE_END
 
 #endif /* __UTIL_STRING_H__ */