diff --git a/addons/test_xlsx_export/tests/test_export.py b/addons/test_xlsx_export/tests/test_export.py
index 5ba8c0a0de5..22b759e7940 100644
--- a/addons/test_xlsx_export/tests/test_export.py
+++ b/addons/test_xlsx_export/tests/test_export.py
@@ -116,13 +116,13 @@ class TestGroupedExport(XlsxCreatorCase):
 
         self.assertExportEqual(export, [
             ['Int Sum'      ,'Float Min'],
-            ['10 (2)'       ,'111.0'],
-            ['    111.0 (1)','111.0'],
+            ['10 (2)'       ,'111.00'],
+            ['    111.0 (1)','111.00'],
             ['10'           ,'111.0'],
-            ['    222.0 (1)','222.0'],
+            ['    222.0 (1)','222.00'],
             ['10'           ,'222.0'],
-            ['20 (1)'       ,'333.0'],
-            ['    333.0 (1)','333.0'],
+            ['20 (1)'       ,'333.00'],
+            ['    333.0 (1)','333.00'],
             ['20'           ,'333.0'],
         ])
 
@@ -136,13 +136,13 @@ class TestGroupedExport(XlsxCreatorCase):
 
         self.assertExportEqual(export, [
             ['Int Sum'      ,'Float Avg'],
-            ['10 (2)'       ,'150.0'],
-            ['    100.0 (1)','100.0'],
+            ['10 (2)'       ,'150.00'],
+            ['    100.0 (1)','100.00'],
             ['10'           ,'100.0'],
-            ['    200.0 (1)','200.0'],
+            ['    200.0 (1)','200.00'],
             ['10'           ,'200.0'],
-            ['20 (1)'       ,'300.0'],
-            ['    300.0 (1)','300.0'],
+            ['20 (1)'       ,'300.00'],
+            ['    300.0 (1)','300.00'],
             ['20'           ,'300.0'],
         ])
 
@@ -157,14 +157,14 @@ class TestGroupedExport(XlsxCreatorCase):
 
         self.assertExportEqual(export, [
             ['Int Sum'          ,'Float Avg'],
-            ['10 (3)'           ,'300.0'],
-            ['    20 (1)'       ,'600.0'],
-            ['        600.0 (1)','600.0'],
+            ['10 (3)'           ,'300.00'],
+            ['    20 (1)'       ,'600.00'],
+            ['        600.0 (1)','600.00'],
             ['10'               ,'600.0'],
-            ['    30 (2)'       ,'150.0'],
-            ['        100.0 (1)','100.0'],
+            ['    30 (2)'       ,'150.00'],
+            ['        100.0 (1)','100.00'],
             ['10'               ,'100.0'],
-            ['        200.0 (1)','200.0'],
+            ['        200.0 (1)','200.00'],
             ['10'               ,'200.0'],
         ])
 
@@ -179,12 +179,12 @@ class TestGroupedExport(XlsxCreatorCase):
 
         self.assertExportEqual(export, [
             ['Int Sum'              ,'Float Avg'],
-            ['10 (3)'               ,'0.0'],
-            ['    20 (1)'           ,'0.0'],
-            ['        Undefined (1)','0.0'],
+            ['10 (3)'               ,'0.00'],
+            ['    20 (1)'           ,'0.00'],
+            ['        Undefined (1)','0.00'],
             ['10'                   ,'0.0'],
-            ['    30 (2)'           ,'0.0'],
-            ['        Undefined (2)','0.0'],
+            ['    30 (2)'           ,'0.00'],
+            ['        Undefined (2)','0.00'],
             ['10'                   ,'0.0'],
             ['10'                   ,'0.0'],
         ])
diff --git a/addons/web/controllers/main.py b/addons/web/controllers/main.py
index 4682842314f..f1095773a6d 100644
--- a/addons/web/controllers/main.py
+++ b/addons/web/controllers/main.py
@@ -34,7 +34,7 @@ import odoo
 import odoo.modules.registry
 from odoo.api import call_kw, Environment
 from odoo.modules import get_module_path, get_resource_path
-from odoo.tools import image_process, topological_sort, html_escape, pycompat, ustr, apply_inheritance_specs, lazy_property
+from odoo.tools import image_process, topological_sort, html_escape, pycompat, ustr, apply_inheritance_specs, lazy_property, float_repr
 from odoo.tools.mimetypes import guess_mimetype
 from odoo.tools.translate import _
 from odoo.tools.misc import str2bool, xlsxwriter, file_open
@@ -843,6 +843,10 @@ class GroupExportXlsxWriter(ExportXlsxWriter):
         for field in self.fields[1:]: # No aggregates allowed in the first column because of the group title
             column += 1
             aggregated_value = aggregates.get(field['name'])
+            # Non-stored float fields may not be displayed properly because of float representation
+            # => we force 2 digits
+            if not field.get('store') and isinstance(aggregated_value, float):
+                aggregated_value = float_repr(aggregated_value, 2)
             self.write(row, column, str(aggregated_value if aggregated_value is not None else ''), self.header_bold_style)
         return row + 1, 0
 
diff --git a/addons/web/static/src/js/widgets/data_export.js b/addons/web/static/src/js/widgets/data_export.js
index 61b2cffe862..85c6886ea0b 100644
--- a/addons/web/static/src/js/widgets/data_export.js
+++ b/addons/web/static/src/js/widgets/data_export.js
@@ -119,6 +119,7 @@ var DataExport = Dialog.extend({
         let exportedFields = this.defaultExportFields.map(field => ({
             name: field,
             label: this.record.fields[field].string,
+            store: this.record.fields[field].store,
         }));
         this._exportData(exportedFields, 'xlsx', false);
     },