The Cheapest Way to Ship Large Boxes

Calculating shipping costs and choosing the most economical shipping method can be confusing. Our Cheapest Way to Ship Anything guides make it easy to compare shipping costs and choose the right method for your cargo, whether you're shipping common items like boxes or difficult-to-transport goods like antiques or artwork.

Jump to:

1. How Much Does it Cost to Ship Large Boxes?

We've calculated shipping costs for three common shipping methods: USPS, parcel shipping, and consolidated freight.

i. USPS shipping costs

ii. Parcel shipping costs (eg. UPS or FedEx)

iii. Consolidated freight

2. Frequently Asked Questions

Get answers to the most frequently asked questions about shipping large boxes.

Mailing or shipping small boxes and parcels is often straightforward—most of the time, you can simply drop them off at your local post office or courier. Shipping large boxes, however, can be a little more complicated. Every carrier defines “large box” differently, and USPS and courier services like FedEx® and UPS® have strict weight and size limits and can quickly become too costly for large packages, especially if your boxes are also heavy or if they are travelling a long distance.

There are many reasons why you might need to ship large boxes, such as:

1. Business owners sending large boxes to customers, the next step in your supply chain, or another location in your network.
2. Homeowners shipping large boxes as part of a household move, including small apartment moves, college moves, estate distributions, and full household moves.

Whether you’re a business owner or a homeowner, there are a number of special considerations to keep in mind when shipping large boxes:

• Box size: Every carrier defines “large box” differently. Generally, a large box is about the size of a large suitcase. The most common large box size is 18” x 18” x 24”, but larger sizes are also available. The box you choose should be slightly larger than what you are packing or shipping to allow enough space to pack your items in a way that will prevent shifting and breakage. However, your box should not be so large that you end up paying higher shipping costs than you need to.
• Accurate measurements: Always measure your boxes before shipping—especially if you’re shipping large boxes—to avoid incurring any unexpected oversized package charges.

• Box weight: Large boxes should be packed full but not heavy. Ideally, large boxes will not exceed 50 lbs so they can be moved easily without risk of injury or damage, especially if you’ll need to transport them to the post office or parcel depot, load them into a moving vehicle, or carry them to the curbside for freight pickup.
• Dimensional weight: Dimensional weight is a pricing technique used in freight transport, typically for large light packages. Your package will be priced based on an estimated weight that’s calculated based on its length, width, and height to account for the density of your cargo. Large, light packages are more likely to be subject to dimensional weight pricing.
• Box contents: Whatever you’re transporting, it’s important that it’s packed properly to prevent shifting or damage from impact. Large boxes are ideal for packing light items so they are easy to carry, while bulky but heavy items are typically best packed into smaller boxes.
• Proper packing: Packing a large box too full increases the chance of damage to the contents. Overstuffed boxes are more likely to burst in transit, and there’s also a greater likelihood they’ll be packed too heavy, which can increase your shipping costs.

How much does it cost to ship large boxes?

The cheapest way to ship large boxes depends on the exact size of the box, and for some providers, the speed and distance it will travel. For single boxes, USPS is often the cheapest option. For large light boxes, USPS Priority Mail will be the cheapest. For heavy large boxes or shipments of multiple boxes, consolidated freight is one of the most cost-effective shipping methods.

Compare rates for shipping flat rate boxes using the most common shipping methods:

• USPS
• Parcel shipping (such as FedEx or UPS)
• Consolidated freight

USPS

The United States Postal Service can transport large boxes using Priority Mail shipping, as well as Priority Mail Express and Retail Ground.

For flat rate shipping, USPS sells two sizes of large box:

• 23 11/16” x 11 ¾” x 12”
• 12” x 12” x 5 ½”

Both boxes will cost $21.50 to ship regardless of distance traveled or package weight (as long as they are under 70 lbs per box).

Cartons up to 20” x 14” x 10” are also available, but must be shipped using variable pricing. If you want to use your own box, you’ll also need to ship your package using variable pricing. Three variably priced service levels are available for shipping large boxes:

1. Priority Mail: Ships in 1-3 business days depending on origin and destination. Packages must be under 70 lbs and less than 108” in length and 165” in girth.
2. Priority Mail Express: Ships in 1-2 business days with overnight delivery available. Packages must be under 70 lbs and less than 108” in length and 165” in girth.
3. Retail Ground: Ideal for less urgent deliveries and packages too large for Priority Mail or Priority Mail Express. Packages must be under 70 lbs, but can be up to 130” in combined length and girth and may be subject to oversized pricing.

Large, light packages will always be subject to oversized pricing. Dimensional weight charges will apply to all boxes exceeding 1 cubic foot, with exact postage dependent on whichever charge is higher (actual weight vs. dimensional weight).

With variable pricing, your final shipping cost will depend on the size and weight of your package, as well as the speed and distance of travel. Here’s what you can expect to pay to ship a large box using USPS:

Parcel shipping (UPS or FedEx)

Parcel shipping services like UPS and FedEx will accept large packages up to 150 lbs with the same measurements as USPS—up to 108” long or 165” in combined length and girth.

The cost of your shipment will depend on the level of service you choose, as well as the distance your package will travel. Large packages that qualify will be subject to oversized pricing, and large, light packages will be subject to dimensional weight pricing to account for the bulk of the package in addition to its weight.

UPS and FedEx both offer flat rate and variable pricing options. Both carriers can transport packages up to 50 lbs regardless of box size—that means you’ll pay the same flat rate for a large, light package as you’ll pay for the same sized package weighing 50 lbs.

For UPS flat rate shipping, called UPS Simple Rate, you must supply your own boxes. Box sizes and flat rate pricing are determined by box volume. Two large sizes are available:

• Large: 651-1,050”³
• Extra large: 1,051-1,728”³

Additional surcharges will apply for packages that require signature or delivery confirmation.

For FedEx flat rate shipping, called FedEx One Rate, you must use FedEx boxes. Four large box sizes are available:

• Large: 12 ⅜” x 3” x 17 ½” or 8 ¾” x 7 ¾” x 11 ¼”
• Extra large: 11 ⅞” x 10 ¾” x 11” or 15 ¾” x 14 ⅛” x 6”

FedEx One Rate shipments are priced based on the distance travelled as well as the speed of travel.

If you need to ship an even larger box, FedEx also offers a flat rate pricing option for less-than-truckload (LTL) shipments up to 1,200 lbs. Two box sizes are available for flat rate freight pricing:

1. 48” x 40” x 38” (requires palletization)
2. 48” x 40” x 28” (includes integrated pallet)

Shipping costs range from $141 to $349 per box depending on the distance and speed of travel.

For variable pricing from UPS or FedEx, the cost of your large package shipment will depend on the weight of the item and the distance it will travel—the size of the item doesn’t impact your shipping costs.

Consolidated freight

When you ship your large boxes using consolidated freight, your items will share space on the truck with other items heading in the same direction. The size of your item doesn’t impact your shipping costs until your box reaches 8 feet or more on one side. For packages over 8 feet on one side, an “excessive length” flat fee will be applied. This fee increases for packages exceeding 12’ on one side, and increases again for large boxes exceeding 16’.

Three services are available from consolidated freight shippers:

• Flat rate: Some consolidated freight carriers offer flat rate box shipping services for large boxes. TSI’s flat rate box shipping service includes boxes that measure 18” x 14” x 12” and boxes must weigh less than 40 lbs when packed. Three service levels are available starting at $570 for up to five boxes. This service is ideal for transporting clothes and linens, books, and other non-valuable household goods. Learn more about flat rate shipping for large boxes with TSI.
• LTL (less-than-truckload): Sometimes called “Economy” shipping, with LTL shipping you will pack your boxes yourself and help with curbside loading and unloading. LTL shipments have lower prices and faster delivery timelines, and are ideal for items that are not overly fragile or valuable.
• White Glove: This service includes indoor pickup and delivery as well as professional packing services. It’s more expensive with longer timelines, and is ideal for fragile or valuable items such as artwork, antiques, and heirloom pieces.

LTL and White Glove services are priced based on variable pricing. What matters most is the weight of your shipment—the size of your box doesn’t matter unless it exceeds 8 feet on one side.

Most consolidated freight carriers will have a minimum billable weight. These carriers are capable of carrying lighter cargo, but the cost of your shipment will be based on the minimum billable weight even if it weighs less. TSI’s minimum billable weight is 120 lbs.

Here’s what you can expect to expect to pay for LTL shipments of large boxes sent using economy shipping:

NOTE: Shipping cost estimates are calculated using individual providers’ online cost estimator tools. Details, exact prices, and shipping times are not guaranteed.

Frequently Asked Questions