diff --git a/addons/hr_timesheet/controllers/project.py b/addons/hr_timesheet/controllers/project.py
index cf9afc7b4c3..970ae2fdb0f 100644
--- a/addons/hr_timesheet/controllers/project.py
+++ b/addons/hr_timesheet/controllers/project.py
@@ -10,6 +10,31 @@ from odoo.addons.project.controllers.portal import CustomerPortal
 
 class ProjectCustomerPortal(CustomerPortal):
 
+    def _prepare_project_sharing_session_info(self, project):
+        session_info = super()._prepare_project_sharing_session_info(project)
+
+        company = project.company_id
+        timesheet_encode_uom = company.timesheet_encode_uom_id
+        project_time_mode_uom = company.project_time_mode_id
+        session_info['user_companies']['allowed_companies'][company.id].update(
+            timesheet_uom_id=timesheet_encode_uom.id,
+            timesheet_uom_factor=project_time_mode_uom._compute_quantity(
+                1.0,
+                timesheet_encode_uom,
+                round=False
+            ),
+        )
+        session_info['uom_ids'] = {
+            uom.id:
+                {
+                    'id': uom.id,
+                    'name': uom.name,
+                    'rounding': uom.rounding,
+                    'timesheet_widget': uom.timesheet_widget,
+                } for uom in [timesheet_encode_uom, project_time_mode_uom]
+        }
+        return session_info
+
     def _task_get_page_view_values(self, task, access_token, **kwargs):
         values = super(ProjectCustomerPortal, self)._task_get_page_view_values(task, access_token, **kwargs)
         domain = request.env['account.analytic.line']._timesheet_get_portal_domain()
diff --git a/addons/project/controllers/portal.py b/addons/project/controllers/portal.py
index e0f1cc09b6c..7ff3097d604 100644
--- a/addons/project/controllers/portal.py
+++ b/addons/project/controllers/portal.py
@@ -159,12 +159,7 @@ class ProjectCustomerPortal(CustomerPortal):
         values['task_url'] = 'project/%s/task' % project_id
         return request.render("project.portal_my_project", values)
 
-    @http.route("/my/project/<int:project_id>/project_sharing", type="http", auth="user", methods=['GET'])
-    def render_project_backend_view(self, project_id):
-        project = request.env['project.project'].sudo().browse(project_id)
-        if not project.exists() or not project.with_user(request.env.user)._check_project_sharing_access():
-            return request.not_found()
-
+    def _prepare_project_sharing_session_info(self, project):
         session_info = request.env['ir.http'].session_info()
         user_context = request.session.get_context() if request.session.uid else {}
         mods = conf.server_wide_modules or []
@@ -190,11 +185,20 @@ class ProjectCustomerPortal(CustomerPortal):
                     },
                 },
             },
+            # FIXME: See if we prefer to give only the currency that the portal user just need to see the correct information in project sharing
+            currencies=request.env['ir.http'].get_currencies(),
         )
+        return session_info
+
+    @http.route("/my/project/<int:project_id>/project_sharing", type="http", auth="user", methods=['GET'])
+    def render_project_backend_view(self, project_id):
+        project = request.env['project.project'].sudo().browse(project_id)
+        if not project.exists() or not project.with_user(request.env.user)._check_project_sharing_access():
+            return request.not_found()
 
         return request.render(
             'project.project_sharing_embed',
-            {'session_info': session_info},
+            {'session_info': self._prepare_project_sharing_session_info(project)},
         )
 
     @http.route('/my/project/<int:project_id>/task/<int:task_id>', type='http', auth='public', website=True)