On many occasions when the rates on your website seem higher or are different than the rates provided by the carrier they can be boiled down to several simple things.
1. Not using the container/custom box values
The dimensions and weight (values) you have entered into the online quoting tool are of a specific product in your catalogue and not the custom box (container) that the product will be shipped in.
Here's an example.
Product A: 10 x 10 x 10 (L x W x H) and weighs 12.
Custom Box A: 14 x 20 x 20 (L x W x H) with a max. weight of 32.
Note: I have deliberately left out the measurements (in.,cm, lbs, kg) to keep things simple.
Using the example above, you should enter dimensions (L x W x H) of custom box A and the weight of product A at the Calculate Cost of your chosen shipping Carrier.
2. Post Office Prices vs. what you see on the checkout page
When you take your item to the Post Office to pay for the shipping, you pack your item into a box or satchel. The shop assistant at the Post Office measures the box or Satchel with a tape measure. The Length (L) x Width (W) x Height (H) and weighs your package to determine the price of the shipping. The calculation for the shipping price is not based on the product L X W X H or weight alone.
Generally, if the items dead weight is more than the cubic weight, then the higher one will be taken into consideration.
3. Your products are not being packed into any containers. Shipping quotes will then be priced as if your products are being packed individually.
How can l see which custom box is being used for the packing\ shipment?
4. Items being packed
Our packing algorithm is an attempt to produce as close to a real world packaging solution as possible, however, there maybe items that aren't packed in certain scenarios. This can produce more costs especially if another box is required. To understand more about how we pack items into the defined boxes please refer to our Workflow for new box packing algorithm FAQ.