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Prep Core · Calculator

See how much you'd save shipping through us.

Upload the DTC orders you've already shipped. We route each one to your nearest Prep Core warehouse — Vineland, Riverside, San Antonio, or Sarasota — re-price it, and show the difference against what you actually paid.

STEP 1 OF 3  ·  Upload orders 33%

What your file needs

A CSV export of past orders. Column names are matched loosely, and rows missing dimensions are flagged rather than dropped.

dest_zip weight_lb length_in width_in height_in paid_cost order_id · optional dest_city / dest_state · optional

Headers like Zip, Ship To Zip, or postal_code all resolve to dest_zip. Everything runs in your browser — nothing is uploaded or stored.

no file handy?

Routing your orders

Finding the closest warehouse and pricing each shipment…

Here's the difference

Routing map

Each order drawn to its assigned warehouse
Per-warehouse breakdown

Order-by-order

How to read this. Rates in this demo are simulated from distance-based zones and a dimensional-weight calc (DIM ÷ 139), then compared against the cost on your file. In production, the “Prep Core rate” column is the cheapest live quote from POST /v2/rates/estimate on our ShipStation account, priced from the assigned warehouse. Estimates exclude surcharges and assume a comparable ground service — final invoiced cost can differ.