diff --git a/supervisor/api/backups.py b/supervisor/api/backups.py
index e0c5014e797..169819f3364 100644
--- a/supervisor/api/backups.py
+++ b/supervisor/api/backups.py
@@ -54,6 +54,7 @@
     ATTR_ADDITIONAL_LOCATIONS,
     ATTR_BACKGROUND,
     ATTR_LOCATIONS,
+    ATTR_SIZE_BYTES,
     CONTENT_TYPE_TAR,
 )
 from .utils import api_process, api_validate
@@ -145,6 +146,7 @@ def _list_backups(self):
                 ATTR_DATE: backup.date,
                 ATTR_TYPE: backup.sys_type,
                 ATTR_SIZE: backup.size,
+                ATTR_SIZE_BYTES: backup.size_bytes,
                 ATTR_LOCATION: backup.location,
                 ATTR_LOCATIONS: backup.locations,
                 ATTR_PROTECTED: backup.protected,
@@ -216,6 +218,7 @@ async def backup_info(self, request):
             ATTR_NAME: backup.name,
             ATTR_DATE: backup.date,
             ATTR_SIZE: backup.size,
+            ATTR_SIZE_BYTES: backup.size_bytes,
             ATTR_COMPRESSED: backup.compressed,
             ATTR_PROTECTED: backup.protected,
             ATTR_SUPERVISOR_VERSION: backup.supervisor_version,
diff --git a/supervisor/api/const.py b/supervisor/api/const.py
index 402fb1af8d4..fb0f7287d1d 100644
--- a/supervisor/api/const.py
+++ b/supervisor/api/const.py
@@ -59,6 +59,7 @@
 ATTR_SAFE_MODE = "safe_mode"
 ATTR_SEAT = "seat"
 ATTR_SIGNED = "signed"
+ATTR_SIZE_BYTES = "size_bytes"
 ATTR_STARTUP_TIME = "startup_time"
 ATTR_STATUS = "status"
 ATTR_SUBSYSTEM = "subsystem"
diff --git a/supervisor/backups/backup.py b/supervisor/backups/backup.py
index 8dbd5aa351b..af6406ab45a 100644
--- a/supervisor/backups/backup.py
+++ b/supervisor/backups/backup.py
@@ -6,6 +6,7 @@
 from collections.abc import Awaitable
 from copy import deepcopy
 from datetime import timedelta
+from functools import cached_property
 import io
 import json
 import logging
@@ -213,12 +214,17 @@ def locations(self) -> list[str | None]:
             key=location_sort_key,
         )
 
-    @property
+    @cached_property
     def size(self) -> float:
         """Return backup size."""
+        return round(self.size_bytes / 1048576, 2)  # calc mbyte
+
+    @cached_property
+    def size_bytes(self) -> int:
+        """Return backup size in bytes."""
         if not self.tarfile.is_file():
             return 0
-        return round(self.tarfile.stat().st_size / 1048576, 2)  # calc mbyte
+        return self.tarfile.stat().st_size
 
     @property
     def is_new(self) -> bool:
diff --git a/tests/api/test_backups.py b/tests/api/test_backups.py
index 3a84014254e..f409cdbe601 100644
--- a/tests/api/test_backups.py
+++ b/tests/api/test_backups.py
@@ -25,8 +25,12 @@
 from tests.const import TEST_ADDON_SLUG
 
 
-async def test_info(api_client, coresys: CoreSys, mock_full_backup: Backup):
+async def test_info(
+    api_client, coresys: CoreSys, mock_full_backup: Backup, tmp_path: Path
+):
     """Test info endpoint."""
+    copy(get_fixture_path("backup_example.tar"), tmp_path / "test_backup.tar")
+
     resp = await api_client.get("/backups/info")
     result = await resp.json()
     assert result["data"]["days_until_stale"] == 30
@@ -35,10 +39,38 @@ async def test_info(api_client, coresys: CoreSys, mock_full_backup: Backup):
     assert result["data"]["backups"][0]["content"]["homeassistant"] is True
     assert len(result["data"]["backups"][0]["content"]["addons"]) == 1
     assert result["data"]["backups"][0]["content"]["addons"][0] == "local_ssh"
+    assert result["data"]["backups"][0]["size"] == 0.01
+    assert result["data"]["backups"][0]["size_bytes"] == 10240
+
 
+async def test_backup_more_info(
+    api_client, coresys: CoreSys, mock_full_backup: Backup, tmp_path: Path
+):
+    """Test info endpoint."""
+    copy(get_fixture_path("backup_example.tar"), tmp_path / "test_backup.tar")
 
-async def test_list(api_client, coresys: CoreSys, mock_full_backup: Backup):
+    resp = await api_client.get("/backups/test/info")
+    result = await resp.json()
+    assert result["data"]["slug"] == "test"
+    assert result["data"]["homeassistant"] == "2022.8.0"
+    assert len(result["data"]["addons"]) == 1
+    assert result["data"]["addons"][0] == {
+        "name": "SSH",
+        "size": 0,
+        "slug": "local_ssh",
+        "version": "1.0.0",
+    }
+    assert result["data"]["size"] == 0.01
+    assert result["data"]["size_bytes"] == 10240
+    assert result["data"]["homeassistant_exclude_database"] is False
+
+
+async def test_list(
+    api_client, coresys: CoreSys, mock_full_backup: Backup, tmp_path: Path
+):
     """Test list endpoint."""
+    copy(get_fixture_path("backup_example.tar"), tmp_path / "test_backup.tar")
+
     resp = await api_client.get("/backups")
     result = await resp.json()
     assert len(result["data"]["backups"]) == 1
@@ -46,6 +78,8 @@ async def test_list(api_client, coresys: CoreSys, mock_full_backup: Backup):
     assert result["data"]["backups"][0]["content"]["homeassistant"] is True
     assert len(result["data"]["backups"][0]["content"]["addons"]) == 1
     assert result["data"]["backups"][0]["content"]["addons"][0] == "local_ssh"
+    assert result["data"]["backups"][0]["size"] == 0.01
+    assert result["data"]["backups"][0]["size_bytes"] == 10240
 
 
 async def test_options(api_client, coresys: CoreSys):
diff --git a/tests/conftest.py b/tests/conftest.py
index 055b9fe7dc4..23fd12b6778 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -30,6 +30,7 @@
     ATTR_ADDONS,
     ATTR_ADDONS_CUSTOM_LIST,
     ATTR_DATE,
+    ATTR_EXCLUDE_DATABASE,
     ATTR_FOLDERS,
     ATTR_HOMEASSISTANT,
     ATTR_NAME,
@@ -580,7 +581,7 @@ def install_addon_example(coresys: CoreSys, repository):
 @pytest.fixture
 async def mock_full_backup(coresys: CoreSys, tmp_path) -> Backup:
     """Mock a full backup."""
-    mock_backup = Backup(coresys, Path(tmp_path, "test_backup"), "test", None)
+    mock_backup = Backup(coresys, Path(tmp_path, "test_backup.tar"), "test", None)
     mock_backup.new("Test", utcnow().isoformat(), BackupType.FULL)
     mock_backup.repositories = ["https://github.com/awesome-developer/awesome-repo"]
     mock_backup.docker = {}
@@ -596,6 +597,7 @@ async def mock_full_backup(coresys: CoreSys, tmp_path) -> Backup:
     mock_backup._data[ATTR_HOMEASSISTANT] = {
         ATTR_VERSION: AwesomeVersion("2022.8.0"),
         ATTR_SIZE: 0,
+        ATTR_EXCLUDE_DATABASE: False,
     }
     coresys.backups._backups = {"test": mock_backup}
     yield mock_backup
@@ -604,7 +606,7 @@ async def mock_full_backup(coresys: CoreSys, tmp_path) -> Backup:
 @pytest.fixture
 async def mock_partial_backup(coresys: CoreSys, tmp_path) -> Backup:
     """Mock a partial backup."""
-    mock_backup = Backup(coresys, Path(tmp_path, "test_backup"), "test", None)
+    mock_backup = Backup(coresys, Path(tmp_path, "test_backup.tar"), "test", None)
     mock_backup.new("Test", utcnow().isoformat(), BackupType.PARTIAL)
     mock_backup.repositories = ["https://github.com/awesome-developer/awesome-repo"]
     mock_backup.docker = {}
@@ -620,6 +622,7 @@ async def mock_partial_backup(coresys: CoreSys, tmp_path) -> Backup:
     mock_backup._data[ATTR_HOMEASSISTANT] = {
         ATTR_VERSION: AwesomeVersion("2022.8.0"),
         ATTR_SIZE: 0,
+        ATTR_EXCLUDE_DATABASE: False,
     }
     coresys.backups._backups = {"test": mock_backup}
     yield mock_backup