diff --git a/hw/smbios/smbios.c b/hw/smbios/smbios.c
index 27a07e96f4..a27e54b2fa 100644
--- a/hw/smbios/smbios.c
+++ b/hw/smbios/smbios.c
@@ -16,6 +16,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/units.h"
 #include "qapi/error.h"
 #include "qemu/config-file.h"
 #include "qemu/error-report.h"
@@ -625,10 +626,6 @@ static void smbios_build_type_11_table(void)
     SMBIOS_BUILD_TABLE_POST;
 }
 
-#define ONE_KB ((ram_addr_t)1 << 10)
-#define ONE_MB ((ram_addr_t)1 << 20)
-#define ONE_GB ((ram_addr_t)1 << 30)
-
 #define MAX_T16_STD_SZ 0x80000000 /* 2T in Kilobytes */
 
 static void smbios_build_type_16_table(unsigned dimm_cnt)
@@ -640,7 +637,7 @@ static void smbios_build_type_16_table(unsigned dimm_cnt)
     t->location = 0x01; /* Other */
     t->use = 0x03; /* System memory */
     t->error_correction = 0x06; /* Multi-bit ECC (for Microsoft, per SeaBIOS) */
-    size_kb = QEMU_ALIGN_UP(ram_size, ONE_KB) / ONE_KB;
+    size_kb = QEMU_ALIGN_UP(ram_size, KiB) / KiB;
     if (size_kb < MAX_T16_STD_SZ) {
         t->maximum_capacity = cpu_to_le32(size_kb);
         t->extended_maximum_capacity = cpu_to_le64(0);
@@ -668,7 +665,7 @@ static void smbios_build_type_17_table(unsigned instance, uint64_t size)
     t->memory_error_information_handle = cpu_to_le16(0xFFFE); /* Not provided */
     t->total_width = cpu_to_le16(0xFFFF); /* Unknown */
     t->data_width = cpu_to_le16(0xFFFF); /* Unknown */
-    size_mb = QEMU_ALIGN_UP(size, ONE_MB) / ONE_MB;
+    size_mb = QEMU_ALIGN_UP(size, MiB) / MiB;
     if (size_mb < MAX_T17_STD_SZ) {
         t->size = cpu_to_le16(size_mb);
         t->extended_size = cpu_to_le32(0);
@@ -707,8 +704,8 @@ static void smbios_build_type_19_table(unsigned instance,
 
     end = start + size - 1;
     assert(end > start);
-    start_kb = start / ONE_KB;
-    end_kb = end / ONE_KB;
+    start_kb = start / KiB;
+    end_kb = end / KiB;
     if (start_kb < UINT32_MAX && end_kb < UINT32_MAX) {
         t->starting_address = cpu_to_le32(start_kb);
         t->ending_address = cpu_to_le32(end_kb);
@@ -869,7 +866,7 @@ void smbios_get_tables(const struct smbios_phys_mem_area *mem_array,
 
         smbios_build_type_11_table();
 
-#define MAX_DIMM_SZ (16ll * ONE_GB)
+#define MAX_DIMM_SZ (16 * GiB)
 #define GET_DIMM_SZ ((i < dimm_cnt - 1) ? MAX_DIMM_SZ \
                                         : ((ram_size - 1) % MAX_DIMM_SZ) + 1)