Compare shipping rates across USPS, UPS, FedEx, and DHL side-by-side. Enter package weight and dimensions to see estimated costs by carrier and service level.
The Carrier Comparison Calculator lets you compare estimated shipping rates from USPS, UPS, FedEx, and DHL side by side based on package weight and service level. Carrier pricing varies significantly — USPS is often cheapest for lightweight packages under 1 lb, while UPS and FedEx compete for 2–50 lb packages, and DHL often wins for international shipments.
Rather than checking four carrier websites separately, this calculator shows estimated rates for standard, expedited, and express services from all major carriers in a single comparison table. The models use publicly available base rate structures and typical discounts.
Note: actual rates vary by account negotiation, shipping volume, origin/destination, and surcharges. Use this as a directional comparison to identify which carriers to get quotes from. Whether you are a beginner or experienced professional, this free online tool provides instant, reliable results without manual computation. By automating the calculation, you save time and reduce the risk of costly errors in your planning and decision-making process.
Stop checking four carrier websites. This calculator compares rates across USPS, UPS, FedEx, and DHL in one view so you can quickly identify the cheapest option for any package. Having a precise figure at your fingertips empowers better planning and more confident decisions. Manual calculations are error-prone and time-consuming; this tool delivers verified results in seconds so you can focus on strategy.
Rate = Base Rate + Weight Surcharge + Zone Adjustment DIM Weight = (L × W × H) / DIM Factor Billable Weight = max(Actual Weight, DIM Weight) Each carrier uses different DIM factors: USPS 166, UPS 139, FedEx 139, DHL 139
Result: USPS: $12.30 | UPS: $14.75 | FedEx: $14.20 | DHL: $18.50
For a 5 lb package (12×10×8 in) to zone 5: DIM weight is 960/139 = 6.9 lb for UPS/FedEx (billable: 6.9 lb) and 960/166 = 5.8 lb for USPS (billable: 5.8 lb). USPS Priority Mail is cheapest at $12.30. FedEx Ground edges out UPS Ground by $0.55. DHL is most expensive for domestic ground.
No single carrier is cheapest for every shipment. The optimal carrier depends on weight, size, distance, speed, and your negotiated rates. Most high-volume sellers use 2–3 carriers to get the best rate for each shipment. Shipping platforms like ShipStation, Pirate Ship, and EasyPost provide rate shopping across carriers.
Dimensional weight often costs more than actual weight. A 2 lb box measuring 18×12×12 has a DIM weight of 18.7 lb at UPS/FedEx (DIM factor 139) and 15.7 lb at USPS (DIM factor 166). That difference means USPS charges for 15.7 lb while UPS charges for 18.7 lb, a significant rate gap.
With 50+ packages per week, you can negotiate 15–40% discounts. Start by getting quotes from all four carriers. Use the lowest quote as leverage with your preferred carrier. Key areas to negotiate: per-package rates, DIM factor increases, residential surcharge reductions, and peak season surcharge caps.
It depends on weight and size. USPS is cheapest for under 1 lb (First-Class: $3–5). UPS and FedEx compete for 2–50 lb ground shipments ($8–30). DHL is often cheapest for international. For most e-commerce sellers, a multi-carrier strategy saves 10–20% vs using a single carrier.
Rates differ by: base rate structure, DIM divisor (USPS 166, UPS/FedEx 139), zone pricing, residential surcharges ($4–6 for UPS/FedEx), and volume discounts. USPS doesn't charge residential surcharges, making it cheaper for B2C shipments under 10 lbs.
Zones represent distance from origin to destination, numbered 1–8 (9 for some carriers). Zone 1 is local (same area), Zone 8 is coast-to-coast. Higher zones cost more. All carriers use similar zone maps. USPS zones affect Priority and Ground Advantage; First-Class is zone-independent.
Multi-carrier strategies save 10–20%. Use USPS for lightweight packages under 1 lb. Use UPS or FedEx Ground for heavier packages. Use DHL for international. Shipping platforms (ShipStation, Pirate Ship, EasyPost) make multi-carrier shipping simple with rate shopping.
Ship more volume (carriers offer tiers at 50, 200, 500+ packages/week), use third-party postage platforms (Pirate Ship, ShipStation get pre-negotiated USPS rates), negotiate directly with UPS/FedEx using competitor quotes, and consolidate to fewer carriers for volume leverage. Following these guidelines will help ensure accurate results and better outcomes over time.
These are estimated rates based on publicly available pricing. Actual rates vary by your negotiated discounts, surcharges (residential, extended area, peak), fuel surcharges (11–15% for UPS/FedEx), and special handling. Use these as directional guidance and get actual quotes from carriers.