Shipping Cost Calculator
Compare USPS, UPS, and FedEx shipping rates by weight and dimensions. Find the cheapest option instantly.
Leave blank for default 6x4x2 in. Dimensions affect DIM weight for UPS/FedEx.
How Shipping Costs Are Calculated
Shipping rates depend on weight, dimensions, and distance. USPS First Class is cheapest for items under 1 lb. Priority Mail is best for 1-5 lb packages. UPS and FedEx Ground are competitive for heavier items, especially when DIM weight applies.
Dimensional (DIM) weight matters for UPS and FedEx: carriers charge whichever is greater — actual weight or the calculated dimensional weight (L x W x H / 139). Packing efficiently in smaller boxes can save money.
USPS First Class Rates
1-4 oz$3.49
5-8 oz$3.99
9-12 oz$4.99
13-15.99 oz$5.49
USPS Priority Mail Rates
Up to 1 lb$8.50
1-2 lbs$9.45
2-3 lbs$10.50
3-5 lbs$11.85
5-10 lbs$14.25
10-20 lbs$18.75
20-35 lbs$25.50
35-70 lbs$35.00
Shipping Tips for Resellers
- Always weigh items with packaging — the total weight determines the rate.
- Use poly mailers instead of boxes when possible to reduce DIM weight.
- Buy shipping through your selling platform for discounted rates (eBay, Poshmark, Mercari all offer discounts).
- USPS Priority Mail Flat Rate boxes are ideal when the item is heavy but fits in a small box.
- Schedule free USPS pickups instead of driving to the post office.
Enter a weight above to compare shipping rates.