diff --git a/addons/sale_stock/models/sale_order.py b/addons/sale_stock/models/sale_order.py
index 75607d09e0a..be166972818 100644
--- a/addons/sale_stock/models/sale_order.py
+++ b/addons/sale_stock/models/sale_order.py
@@ -7,7 +7,7 @@ from datetime import datetime, timedelta
 from collections import defaultdict
 
 from odoo import api, fields, models, _
-from odoo.tools import DEFAULT_SERVER_DATETIME_FORMAT, float_compare
+from odoo.tools import DEFAULT_SERVER_DATETIME_FORMAT, float_compare, float_round
 from odoo.exceptions import UserError
 
 _logger = logging.getLogger(__name__)
@@ -570,7 +570,18 @@ class SaleOrderLine(models.Model):
         pack = self.product_packaging
         qty = self.product_uom_qty
         q = default_uom._compute_quantity(pack.qty, self.product_uom)
-        if qty and q and round(qty % q, 2):
+        # We do not use the modulo operator to check if qty is a mltiple of q. Indeed the quantity
+        # per package might be a float, leading to incorrect results. For example:
+        # 8 % 1.6 = 1.5999999999999996
+        # 5.4 % 1.8 = 2.220446049250313e-16
+        if (
+            qty
+            and q
+            and float_compare(
+                qty / q, float_round(qty / q, precision_rounding=1.0), precision_rounding=0.001
+            )
+            != 0
+        ):
             newqty = qty - (qty % q) + q
             return {
                 'warning': {