Find the cheapest rate for every package
Pick your package size, shipping zone, and volume — we'll show you the cheapest carrier and how much you'd save with commercial pricing.
How It Works
Enter Your Package
Input dimensions, weight, and destination zone
Compare All Carriers
See rates across USPS, UPS, FedEx & DHL sorted by price
Unlock Savings
Get commercial pricing through our recommended platforms
Why Shipbase?
Shipbase is a free shipping cost calculator built for eCommerce sellers, small businesses, and side hustlers who want to stop overpaying for shipping. Enter your package size and monthly volume, and Shipbase instantly compares retail rates across USPS, UPS, FedEx, and DHL — then shows you how much you'd save by switching to commercial pricing through platforms like ShippingEasy, ShipStation, Easyship, and Shippo.
No sign-up required. No hidden fees. Shipbase runs entirely in your browser — we don't collect personal data or store your shipment details. Just fast, transparent rate comparisons so you can make smarter shipping decisions.
Compare Shipping Rates Across All Major Carriers
Shipping costs can make or break an ecommerce business. Whether you're sending packages via USPS, UPS, FedEx, or DHL, retail rates eat into your margins — especially as package volumes grow. Shipbase's free shipping cost calculator helps you instantly compare rates across all four major carriers, factoring in dimensional weight, fuel surcharges, and residential delivery fees.
Most online sellers overpay for shipping because they use retail counter rates. Commercial pricing platforms negotiate bulk discounts with carriers and pass those savings on to you — often with no volume minimums and no monthly fees. Shipbase shows you exactly how much you could save per shipment, per month, and per year by switching to discounted commercial rates.
Frequently Asked Questions
Understanding Shipping Costs in 2025
Shipping rates change annually as carriers adjust for fuel costs, demand, and operational expenses. In 2025, USPS Ground Advantage remains the most affordable option for lightweight packages under 5 lbs, while UPS and FedEx Ground offer competitive pricing for heavier shipments with faster transit times. For international shipping, DHL Express and USPS Priority Mail International are the most popular choices.
Dimensional weight pricing (also called DIM weight) is used by all major carriers. Instead of charging based on actual weight alone, carriers calculate a dimensional weight using the formula: (Length × Width × Height) ÷ 139. The higher of actual weight or DIM weight determines your billable weight — and your final cost. Shipbase automatically factors this in.
Fuel surcharges typically add 10–15% to the base rate and fluctuate quarterly. UPS and FedEx also charge a residential delivery surcharge of $4–$6 per package for home deliveries. These hidden fees are included in Shipbase's calculations so you see the true cost of each shipment.