There is a secret shipping program that offers the best rates for packages that are between 1 and 20 pounds. It’s the fastest and cheapest way to ship your items, but you won’t find just anywhere. It’s called Cubic, and it’s a priority mail service offered by the USPS.

With Cubic, your business gets charged based on the dimensions of your package, not its weight. It’s an excellent alternative to FedEx and UPS if you want to save the most money on shipping. The trick is that you need to be using software that offers this incredible service at the correct rate (some shipping platforms mark this up to make more money).

Let’s find out about the benefits of Cubic pricing and how the service works.


Benefits of USPS Priority Mail Cubic

USPS Priority Mail Cubic pricing offers many benefits that you won’t find from other carriers. These include:

    • Fast Delivery Within 1 to 3 Business days: USPS’s Priority Mail Cubic service makes it possible to ship your items to customers within 1 to 3 days across all states in the USA.
    • Free Package Tracking: USPS will offer free package tracking on shipments so you can follow the journey of your product.
    • Cheapest Price for Small Packages: With Cubic, you get much more competitive rates than if you were shipping from other carriers.

Cubic offers you the possibility to save big on all of your shipping. What makes it difficult is that not all third party shipping softwares offer Cubic – or true Cubic pricing.


How USPS Priority Mail Cubic Works

As mentioned above, Cubic has a unique pricing method that doesn’t take into account the weight of your package. Here are the steps you need to take to calculate your package with Cubic:

        1. Measure the length, width, and height of your package. Round each dimension down to the nearest quarter inch. For example: 3 x 10 x 12 package
        2. Multiply the dimensions together (Height x Width x Length) and then divide that number by 1728. For example: 3 x 10 x 12 = 360 / 1728 = .2083
        3. The decimal you get back is the size of your package in “cubic feet.” You have to round up to .1, .2, .3, .4, or .5. For example: .2083 rounds up to .3

The bottom line is that cubic pricing means weight doesn’t come into the equation, allowing you to ship cheaply when your package is less than 20 lbs and is smaller than .5 cubic.

How USPS Priority Mail Cubic Works



USPS Pricing Tiers

When it comes to Cubic feet measurement, your package will fall into one of five tiers that USPS uses to calculate the shipping rate. Here are what each tier consists of:

      • Tier 1: Packages up to .10 cubic feet
      • Tier 2: Packages more than .10 and up to .20 cubic feet
      • Tier 3: Packages more than .20 and up to .30 cubic feet
      • Tier 4: Packages more than .30 and up to .40 cubic feet
      • Tier 5: Packages more than .40 and up to .50 cubic feet


2020 USPS Priority Mail Cubic Rates

How much you’ll be paying depends on your cubic dimensions and your zone. Here’s a table of what the 2020 rates for USPS Priority Mail Cubic look like to give you an idea:

USPS Cubic Pricing Chart

How You Can Get Started With Priority Mail Cubic

The best way to get started with Cubic is to integrate a shipping app. However, since Cubic is a relatively unknown program, it’s hard to find a platform that offers you the service without markup or extra fees.

Even some of the most popular tools, such as Shipstation, don’t offer commercial-level pricing for Cubic. At Essential Hub, we provide you with the best discounts from USPS directly so you can use Cubic at commercial pricing.


Wrapping Things Up

You must take the time to research different packaging options to pick the right one. USPS Priority Mail Cubic is a secret shipping method that only takes into account the dimensions of your package and can save you big money on shipping. If you’re shipping more than 50,000 packages a year, then it’s a program you should consider.


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