diff --git a/docs/api/apiv3/components/schemas/meeting_model.yml b/docs/api/apiv3/components/schemas/meeting_model.yml
index 0b518a1d20ea..1650eb416184 100644
--- a/docs/api/apiv3/components/schemas/meeting_model.yml
+++ b/docs/api/apiv3/components/schemas/meeting_model.yml
@@ -38,7 +38,8 @@ properties:
     format: date-time
     description: The scheduled meeting start time.
   duration:
-    type: number
+    type: string
+    format: duration
     description: The meeting duration in hours.
   createdAt:
     type: string
diff --git a/modules/meeting/lib/api/v3/meetings/meeting_representer.rb b/modules/meeting/lib/api/v3/meetings/meeting_representer.rb
index d64aa415bbfa..e413081aa372 100644
--- a/modules/meeting/lib/api/v3/meetings/meeting_representer.rb
+++ b/modules/meeting/lib/api/v3/meetings/meeting_representer.rb
@@ -55,7 +55,11 @@ class MeetingRepresenter < ::API::Decorators::Single
         date_time_property :start_time
         date_time_property :end_time
 
-        property :duration
+        property :duration,
+                 exec_context: :decorator,
+                 getter: ->(*) do
+                   datetime_formatter.format_duration_from_hours(represented.duration)
+                 end
 
         associated_resource :author,
                             v3_path: :user,
diff --git a/modules/meeting/spec/lib/api/v3/meetings/meeting_representer_spec.rb b/modules/meeting/spec/lib/api/v3/meetings/meeting_representer_spec.rb
index ca26ba5b5273..c586d21aa372 100644
--- a/modules/meeting/spec/lib/api/v3/meetings/meeting_representer_spec.rb
+++ b/modules/meeting/spec/lib/api/v3/meetings/meeting_representer_spec.rb
@@ -90,7 +90,7 @@
       expect(subject).to be_json_eql(meeting.lock_version.to_json).at_path("lockVersion")
       expect(subject).to be_json_eql(meeting.start_time.utc.iso8601(3).to_json).at_path("startTime")
       expect(subject).to be_json_eql(meeting.end_time.utc.iso8601(3).to_json).at_path("endTime")
-      expect(subject).to be_json_eql(meeting.duration.to_json).at_path("duration")
+      expect(subject).to be_json_eql("PT1H".to_json).at_path("duration")
       expect(subject).to be_json_eql(meeting.location.to_json).at_path("location")
 
       expect(subject).to be_json_eql(meeting.created_at.utc.iso8601(3).to_json).at_path("createdAt")