diff --git a/InvenTree/InvenTree/api_version.py b/InvenTree/InvenTree/api_version.py
index aad384331d..9a3b1cef2f 100644
--- a/InvenTree/InvenTree/api_version.py
+++ b/InvenTree/InvenTree/api_version.py
@@ -2,11 +2,14 @@
 
 
 # InvenTree API version
-INVENTREE_API_VERSION = 71
+INVENTREE_API_VERSION = 72
 
 """
 Increment this API version number whenever there is a significant change to the API that any clients need to know about
 
+v72 -> 2022-08-18 : https://github.com/inventree/InvenTree/pull/3567
+    - Allow PurchaseOrder to be duplicated via the API
+
 v71 -> 2022-08-18 : https://github.com/inventree/InvenTree/pull/3564
     - Updates to the "part scheduling" API endpoint
 
diff --git a/InvenTree/order/api.py b/InvenTree/order/api.py
index 72a47e113a..0a625a89c3 100644
--- a/InvenTree/order/api.py
+++ b/InvenTree/order/api.py
@@ -1,10 +1,13 @@
 """JSON API for the Order app."""
 
+from django.db import transaction
 from django.db.models import F, Q
 from django.urls import include, path, re_path
+from django.utils.translation import gettext_lazy as _
 
 from django_filters import rest_framework as rest_filters
 from rest_framework import filters, status
+from rest_framework.exceptions import ValidationError
 from rest_framework.response import Response
 
 import order.models as models
@@ -116,12 +119,48 @@ class PurchaseOrderList(APIDownloadMixin, ListCreateAPI):
 
     def create(self, request, *args, **kwargs):
         """Save user information on create."""
-        serializer = self.get_serializer(data=self.clean_data(request.data))
+
+        data = self.clean_data(request.data)
+
+        duplicate_order = data.pop('duplicate_order', None)
+        duplicate_line_items = str2bool(data.pop('duplicate_line_items', False))
+        duplicate_extra_lines = str2bool(data.pop('duplicate_extra_lines', False))
+
+        if duplicate_order is not None:
+            try:
+                duplicate_order = models.PurchaseOrder.objects.get(pk=duplicate_order)
+            except (ValueError, models.PurchaseOrder.DoesNotExist):
+                raise ValidationError({
+                    'duplicate_order': [_('No matching purchase order found')],
+                })
+
+        serializer = self.get_serializer(data=data)
         serializer.is_valid(raise_exception=True)
 
-        item = serializer.save()
-        item.created_by = request.user
-        item.save()
+        with transaction.atomic():
+            order = serializer.save()
+            order.created_by = request.user
+            order.save()
+
+            # Duplicate line items from other order if required
+            if duplicate_order is not None:
+
+                if duplicate_line_items:
+                    for line in duplicate_order.lines.all():
+                        # Copy the line across to the new order
+                        line.pk = None
+                        line.order = order
+                        line.received = 0
+
+                        line.save()
+
+                if duplicate_extra_lines:
+                    for line in duplicate_order.extra_lines.all():
+                        # Copy the line across to the new order
+                        line.pk = None
+                        line.order = order
+
+                        line.save()
 
         headers = self.get_success_headers(serializer.data)
         return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
diff --git a/InvenTree/order/templates/order/order_base.html b/InvenTree/order/templates/order/order_base.html
index 000d4c7751..cbb82640db 100644
--- a/InvenTree/order/templates/order/order_base.html
+++ b/InvenTree/order/templates/order/order_base.html
@@ -46,6 +46,9 @@
         {% if order.can_cancel %}
         <li><a class='dropdown-item' href='#' id='cancel-order'><span class='fas fa-times-circle icon-red'></span> {% trans "Cancel order" %}</a></li>
         {% endif %}
+        {% if roles.purchase_order.add %}
+        <li><a class='dropdown-item' href='#' id='duplicate-order'><span class='fas fa-clone'></span> {% trans "Duplicate order" %}</a></li>
+        {% endif %}
     </ul>
 </div>
 {% if order.status == PurchaseOrderStatus.PENDING %}
@@ -217,6 +220,8 @@ $('#print-order-report').click(function() {
 });
 {% endif %}
 
+{% if roles.purchase_order.change %}
+
 $("#edit-order").click(function() {
 
     editPurchaseOrder({{ order.pk }}, {
@@ -275,6 +280,16 @@ $("#cancel-order").click(function() {
     );
 });
 
+{% endif %}
+
+{% if roles.purchase_order.add %}
+$('#duplicate-order').click(function() {
+    duplicatePurchaseOrder(
+        {{ order.pk }},
+    );
+});
+{% endif %}
+
 $("#export-order").click(function() {
     exportOrder('{% url "po-export" order.id %}');
 });
diff --git a/InvenTree/order/test_api.py b/InvenTree/order/test_api.py
index 7824fcb4a7..3e5f63c72a 100644
--- a/InvenTree/order/test_api.py
+++ b/InvenTree/order/test_api.py
@@ -225,6 +225,64 @@ class PurchaseOrderTest(OrderTest):
             expected_code=201
         )
 
+    def test_po_duplicate(self):
+        """Test that we can duplicate a PurchaseOrder via the API"""
+
+        self.assignRole('purchase_order.add')
+
+        po = models.PurchaseOrder.objects.get(pk=1)
+
+        self.assertTrue(po.lines.count() > 0)
+
+        # Add some extra line items to this order
+        for idx in range(5):
+            models.PurchaseOrderExtraLine.objects.create(
+                order=po,
+                quantity=idx + 10,
+                reference='some reference',
+            )
+
+        data = self.get(reverse('api-po-detail', kwargs={'pk': 1})).data
+
+        del data['pk']
+        del data['reference']
+
+        data['duplicate_order'] = 1
+        data['duplicate_line_items'] = True
+        data['duplicate_extra_lines'] = False
+
+        data['reference'] = 'PO-9999'
+
+        # Duplicate via the API
+        response = self.post(
+            reverse('api-po-list'),
+            data,
+            expected_code=201
+        )
+
+        # Order is for the same supplier
+        self.assertEqual(response.data['supplier'], po.supplier.pk)
+
+        po_dup = models.PurchaseOrder.objects.get(pk=response.data['pk'])
+
+        self.assertEqual(po_dup.extra_lines.count(), 0)
+        self.assertEqual(po_dup.lines.count(), po.lines.count())
+
+        data['reference'] = 'PO-9998'
+        data['duplicate_line_items'] = False
+        data['duplicate_extra_lines'] = True
+
+        response = self.post(
+            reverse('api-po-list'),
+            data,
+            expected_code=201,
+        )
+
+        po_dup = models.PurchaseOrder.objects.get(pk=response.data['pk'])
+
+        self.assertEqual(po_dup.extra_lines.count(), po.extra_lines.count())
+        self.assertEqual(po_dup.lines.count(), 0)
+
     def test_po_cancel(self):
         """Test the PurchaseOrderCancel API endpoint."""
         po = models.PurchaseOrder.objects.get(pk=1)
diff --git a/InvenTree/templates/js/translated/bom.js b/InvenTree/templates/js/translated/bom.js
index 6193b5a127..ccee63e30f 100644
--- a/InvenTree/templates/js/translated/bom.js
+++ b/InvenTree/templates/js/translated/bom.js
@@ -1049,7 +1049,7 @@ function loadBomTable(table, options={}) {
                     available += row.on_order;
                     can_build = available / row.quantity;
 
-                    text += `<span class='fas fa-info-circle icon-blue float-right' title='{% trans "Including On Order" %}: ${can_build}'></span>`;
+                    text += `<span class='fas fa-info-circle icon-blue float-right' title='{% trans "Including On Order" %}: ${formatDecimal(can_build, 2)}'></span>`;
                 }
 
                 return text;
diff --git a/InvenTree/templates/js/translated/order.js b/InvenTree/templates/js/translated/order.js
index fd9421a6e8..61482acf09 100644
--- a/InvenTree/templates/js/translated/order.js
+++ b/InvenTree/templates/js/translated/order.js
@@ -30,6 +30,7 @@
     createPurchaseOrderLineItem,
     createSalesOrder,
     createSalesOrderShipment,
+    duplicatePurchaseOrder,
     editPurchaseOrder,
     editPurchaseOrderLineItem,
     exportOrder,
@@ -538,6 +539,39 @@ function purchaseOrderFields(options={}) {
         fields.supplier.hidden = true;
     }
 
+    // Add fields for order duplication (only if required)
+    if (options.duplicate_order) {
+        fields.duplicate_order = {
+            value: options.duplicate_order,
+            group: 'duplicate',
+            required: 'true',
+            type: 'related field',
+            model: 'purchaseorder',
+            filters: {
+                supplier_detail: true,
+            },
+            api_url: '{% url "api-po-list" %}',
+            label: '{% trans "Purchase Order" %}',
+            help_text: '{% trans "Select purchase order to duplicate" %}',
+        };
+
+        fields.duplicate_line_items = {
+            value: true,
+            group: 'duplicate',
+            type: 'boolean',
+            label: '{% trans "Duplicate Line Items" %}',
+            help_text: '{% trans "Duplicate all line items from the selected order" %}',
+        };
+
+        fields.duplicate_extra_lines = {
+            value: true,
+            group: 'duplicate',
+            type: 'boolean',
+            label: '{% trans "Duplicate Extra Lines" %}',
+            help_text: '{% trans "Duplicate extra line items from the selected order" %}',
+        };
+    }
+
     return fields;
 }
 
@@ -564,9 +598,20 @@ function createPurchaseOrder(options={}) {
 
     var fields = purchaseOrderFields(options);
 
+    var groups = {};
+
+    if (options.duplicate_order) {
+        groups.duplicate = {
+            title: '{% trans "Duplication Options" %}',
+            collapsible: false,
+        };
+    };
+
     constructForm('{% url "api-po-list" %}', {
         method: 'POST',
         fields: fields,
+        groups: groups,
+        data: options.data,
         onSuccess: function(data) {
 
             if (options.onSuccess) {
@@ -576,7 +621,29 @@ function createPurchaseOrder(options={}) {
                 location.href = `/order/purchase-order/${data.pk}/`;
             }
         },
-        title: '{% trans "Create Purchase Order" %}',
+        title: options.title || '{% trans "Create Purchase Order" %}',
+    });
+}
+
+/*
+ * Duplicate an existing PurchaseOrder
+ * Provides user with option to duplicate line items for the order also.
+ */
+function duplicatePurchaseOrder(order_id, options={}) {
+
+    options.duplicate_order = order_id;
+
+    inventreeGet(`/api/order/po/${order_id}/`, {}, {
+        success: function(data) {
+
+            // Clear out data we do not want to be duplicated
+            delete data['pk'];
+            delete data['reference'];
+
+            options.data = data;
+
+            createPurchaseOrder(options);
+        }
     });
 }