Shipping Cost Estimator
Estimate shipping costs based on package weight, dimensions, distance, and carrier type.
Supports both lb/in and kg/cm units.
Shipping cost estimation combines package weight, dimensions, destination zone, and carrier rate tables to calculate the cost of sending a parcel with major carriers like UPS, FedEx, USPS, and DHL.
Core concepts:
Dimensional Weight (DIM weight): Most carriers charge based on whichever is greater — actual weight or dimensional weight. DIM Weight (lbs) = (Length × Width × Height in inches) ÷ DIM Factor
| Carrier | DIM Factor |
|---|---|
| UPS / FedEx (domestic) | 139 |
| USPS Priority Mail | 166 |
| DHL | 139 |
Billable Weight = MAX(Actual Weight, DIM Weight)
Shipping zones (US domestic): Zones 1–8 represent distance from origin to destination zip code. Zone 1 = adjacent areas; Zone 8 = cross-country. Each additional zone typically adds $0.50–$3.00 per pound.
Worked example: Package: 3 lbs actual weight, 12×10×8 inches. Shipping to Zone 5 via UPS Ground. DIM Weight = (12 × 10 × 8) ÷ 139 = 960 ÷ 139 = 6.9 lbs Billable Weight = MAX(3, 6.9) = 6.9 lbs (DIM weight wins)
UPS Ground Zone 5 rate for ~7 lbs (2025 approximate): $18–$24
Carrier comparison for small packages (2025 estimates):
| Carrier | 1 lb, Zone 5 | 5 lbs, Zone 5 | Notes |
|---|---|---|---|
| USPS First Class | $6–$8 | N/A (max 15.99 oz) | Best for under 1 lb |
| USPS Priority Mail | $9–$13 | $16–$22 | Flat rate boxes available |
| UPS Ground | $12–$16 | $18–$25 | Best for heavy, distant |
| FedEx Ground | $11–$15 | $17–$24 | Similar to UPS |
| FedEx Home Delivery | $12–$16 | $18–$25 | Residential surcharge |
Money-saving tip: USPS Priority Mail flat-rate boxes eliminate zone pricing entirely — ship anything that fits for a flat $10.60–$22.45 regardless of weight or destination.
How we build and check this calculator
This calculator runs entirely in your browser, so the numbers you enter stay on your device. The math behind it is written by hand and tested against worked examples and standard references before the page goes live.
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