diff --git a/bindep.txt b/bindep.txt
index c27bf85f..50a38981 100644
--- a/bindep.txt
+++ b/bindep.txt
@@ -3,3 +3,4 @@ python3-pycurl [platform:rpm]
 python3-netaddr [platform:rpm]
 python3-jmespath [platform:rpm]
 python3-passlib [platform:rpm]
+qemu-img [platform:rpm]
diff --git a/changelogs/fragments/183-ovirt_disk-fix-upload-detection.yml b/changelogs/fragments/183-ovirt_disk-fix-upload-detection.yml
new file mode 100644
index 00000000..fba3f93a
--- /dev/null
+++ b/changelogs/fragments/183-ovirt_disk-fix-upload-detection.yml
@@ -0,0 +1,3 @@
+---
+minor_changes:
+  - ovirt_disk - automatically detect virtual size of qcow image (https://github.com/oVirt/ovirt-ansible-collection/pull/183).
diff --git a/ovirt-ansible-collection.spec.in b/ovirt-ansible-collection.spec.in
index 7e99e0a4..192b6e71 100644
--- a/ovirt-ansible-collection.spec.in
+++ b/ovirt-ansible-collection.spec.in
@@ -16,6 +16,7 @@ Requires:	python3-ovirt-engine-sdk4 >= 4.4.0
 Requires:	python3-netaddr
 Requires:	python3-jmespath
 Requires:	python3-passlib
+Requires:	qemu-img
 
 Obsoletes:	ovirt-ansible-cluster-upgrade
 Obsoletes:	ovirt-ansible-disaster-recovery
diff --git a/plugins/modules/ovirt_disk.py b/plugins/modules/ovirt_disk.py
index 4bb0b6ee..bb8231a6 100644
--- a/plugins/modules/ovirt_disk.py
+++ b/plugins/modules/ovirt_disk.py
@@ -358,10 +358,12 @@
     type: dict
 '''
 
+import json
 import os
+import ssl
+import subprocess
 import time
 import traceback
-import ssl
 
 from ansible.module_utils.six.moves.http_client import HTTPSConnection, IncompleteRead
 from ansible.module_utils.six.moves.urllib.parse import urlparse
@@ -538,7 +540,10 @@ def build_entity(self):
         logical_unit = self._module.params.get('logical_unit')
         size = convert_to_bytes(self._module.params.get('size'))
         if not size and self._module.params.get('upload_image_path'):
-            size = os.path.getsize(self._module.params.get('upload_image_path'))
+            out = subprocess.check_output(
+                ["qemu-img", "info", "--output", "json", self._module.params.get('upload_image_path')])
+            image_info = json.loads(out)
+            size = image_info["virtual-size"]
         disk = otypes.Disk(
             id=self._module.params.get('id'),
             name=self._module.params.get('name'),
@@ -589,7 +594,15 @@ def build_entity(self):
             ) if logical_unit else None,
         )
         if hasattr(disk, 'initial_size') and self._module.params['upload_image_path']:
-            disk.initial_size = size
+            out = subprocess.check_output([
+                'qemu-img',
+                'measure',
+                '-O', 'qcow2' if self._module.params.get('format') == 'cow' else 'raw',
+                '--output', 'json',
+                self._module.params['upload_image_path']
+            ])
+            measure = json.loads(out)
+            disk.initial_size = measure["required"]
 
         return disk