diff --git a/erpnext/public/js/utils/serial_no_batch_selector.js b/erpnext/public/js/utils/serial_no_batch_selector.js
index a289ec415b..b5d3981ba7 100644
--- a/erpnext/public/js/utils/serial_no_batch_selector.js
+++ b/erpnext/public/js/utils/serial_no_batch_selector.js
@@ -74,9 +74,10 @@ erpnext.SerialNoBatchSelector = Class.extend({
 				fieldname: 'qty',
 				fieldtype:'Float',
 				read_only: me.has_batch && !me.has_serial_no,
-				label: __(me.has_batch && !me.has_serial_no ? 'Total Qty' : 'Qty'),
+				label: __(me.has_batch && !me.has_serial_no ? 'Selected Qty' : 'Qty'),
 				default: flt(me.item.stock_qty),
 			},
+			...get_pending_qty_fields(me),
 			{
 				fieldname: 'uom',
 				read_only: 1,
@@ -181,6 +182,7 @@ erpnext.SerialNoBatchSelector = Class.extend({
 
 		if (this.has_batch && !this.has_serial_no) {
 			this.update_total_qty();
+			this.update_pending_qtys();
 		}
 
 		this.dialog.show();
@@ -321,7 +323,21 @@ erpnext.SerialNoBatchSelector = Class.extend({
 
 		qty_field.set_input(total_qty);
 	},
+	update_pending_qtys: function() {
+		const pending_qty_field = this.dialog.fields_dict.pending_qty;
+		const total_selected_qty_field = this.dialog.fields_dict.total_selected_qty;
 
+		if (!pending_qty_field || !total_selected_qty_field) return;
+
+		const me = this;
+		const required_qty = this.dialog.fields_dict.required_qty.value;
+		const selected_qty = this.dialog.fields_dict.qty.value;
+		const total_selected_qty = selected_qty + calc_total_selected_qty(me);
+		const pending_qty = required_qty - total_selected_qty;
+
+		pending_qty_field.set_input(pending_qty);
+		total_selected_qty_field.set_input(total_selected_qty);
+	},
 	get_batch_fields: function() {
 		var me = this;
 
@@ -423,6 +439,7 @@ erpnext.SerialNoBatchSelector = Class.extend({
 							}
 
 							me.update_total_qty();
+							me.update_pending_qtys();
 						}
 					},
 				],
@@ -519,3 +536,60 @@ erpnext.SerialNoBatchSelector = Class.extend({
 		];
 	}
 });
+
+function get_pending_qty_fields(me) {
+	if (!check_can_calculate_pending_qty(me)) return [];
+	const { frm: { doc: { fg_completed_qty }}, item: { item_code, stock_qty }} = me;
+	const { qty_consumed_per_unit } = erpnext.stock.bom.items[item_code];
+
+	const total_selected_qty = calc_total_selected_qty(me);
+	const required_qty = flt(fg_completed_qty) * flt(qty_consumed_per_unit);
+	const pending_qty = required_qty - (flt(stock_qty) + total_selected_qty);
+
+	const pending_qty_fields =  [
+		{ fieldtype: 'Section Break', label: __('Pending Quantity') },
+		{
+			fieldname: 'required_qty',
+			read_only: 1,
+			fieldtype: 'Float',
+			label: __('Required Qty'),
+			default: required_qty
+		},
+		{ fieldtype: 'Column Break' },
+		{
+			fieldname: 'total_selected_qty',
+			read_only: 1,
+			fieldtype: 'Float',
+			label: __('Total Selected Qty'),
+			default: total_selected_qty
+		},
+		{ fieldtype: 'Column Break' },
+		{
+			fieldname: 'pending_qty',
+			read_only: 1,
+			fieldtype: 'Float',
+			label: __('Pending Qty'),
+			default: pending_qty
+		},
+	];
+	return pending_qty_fields;
+}
+
+function calc_total_selected_qty(me) {
+	const { frm: { doc: { items }}, item: { name, item_code }} = me;
+	const totalSelectedQty = items
+		.filter( item => ( item.name !== name ) && ( item.item_code === item_code ) )
+		.map( item => flt(item.qty) )
+		.reduce( (i, j) => i + j, 0);
+	return totalSelectedQty;
+}
+
+function check_can_calculate_pending_qty(me) {
+	const { frm: { doc }, item } = me;
+	const docChecks = doc.bom_no
+		&& doc.fg_completed_qty
+		&& erpnext.stock.bom
+		&& erpnext.stock.bom.name === doc.bom_no;
+	const itemChecks = !!item;
+	return docChecks && itemChecks;
+}
diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.js b/erpnext/stock/doctype/stock_entry/stock_entry.js
index 772c8df96e..daa1e51182 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.js
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.js
@@ -107,6 +107,7 @@ frappe.ui.form.on('Stock Entry', {
 				frappe.flags.hide_serial_batch_dialog = true;
 			}
 		});
+		attach_bom_items(frm.doc.bom_no);
 	},
 
 	setup_quality_inspection: function(frm) {
@@ -311,6 +312,7 @@ frappe.ui.form.on('Stock Entry', {
 		}
 
 		frm.trigger("setup_quality_inspection");
+		attach_bom_items(frm.doc.bom_no)
 	},
 
 	stock_entry_type: function(frm){
@@ -919,6 +921,7 @@ erpnext.stock.StockEntry = erpnext.stock.StockController.extend({
 				method: "get_items",
 				callback: function(r) {
 					if(!r.exc) refresh_field("items");
+					if(me.frm.doc.bom_no) attach_bom_items(me.frm.doc.bom_no)
 				}
 			});
 		}
@@ -1064,4 +1067,22 @@ erpnext.stock.select_batch_and_serial_no = (frm, item) => {
 
 }
 
+function attach_bom_items(bom_no) {
+	if (check_should_not_attach_bom_items(bom_no)) return
+	frappe.db.get_doc("BOM",bom_no).then(bom => {
+		const {name, items} = bom
+		erpnext.stock.bom = {name, items:{}}
+		items.forEach(item => {
+			erpnext.stock.bom.items[item.item_code] = item;
+		});
+	});
+}
+
+function check_should_not_attach_bom_items(bom_no) {
+  return (
+    bom_no === undefined ||
+    (erpnext.stock.bom && erpnext.stock.bom.name === bom_no)
+  );
+}
+
 $.extend(cur_frm.cscript, new erpnext.stock.StockEntry({frm: cur_frm}));