Volumetric weight: what is it and how can it save your e-commerce business money?

May 01 2024, by Nathan Calvert
3 min reading time

Have you ever wondered why some packages cost more to ship than others, even if they are similar in size and weight?

The answer lies in the concept of volumetric weight. Understanding how volumetric weight works can help your ecommerce business save money on shipping costs. In this article, we will explore the science behind volumetric weight, its impact on shipping costs, how to implement it in your ecommerce business, and the financial benefits it can bring. We will also discuss common misconceptions and offer tips for overcoming challenges with volumetric weight. So let's dive right in!

Understanding the concept of volumetric weight

Before we can delve into the intricacies of volumetric weight, it's important to understand the concept itself. Volumetric weight, or dimensional weight, is a calculation used by shipping companies to determine cost based on package size rather than just actual weight. It accounts for the space a package occupies in vehicles or warehouses.

The science behind volumetric weight

Volumetric weight recognises that empty space matters. A large, lightweight box consumes more space—and resources—than a smaller, heavier one. Charging by volume ensures carriers are compensated for that space.

How is volumetric weight calculated?

Use this formula:

(L × W × H) / Volumetric divisor = Volumetric Weight

For example, DPD uses a divisor of 5,000 cm³/kg. Many carriers offer online calculators—and you can try one here.

The impact of volumetric weight on shipping costs

Why does volumetric weight matter in shipping?

Shipping cost is based on whichever is higher: actual weight or volumetric weight. Large, lightweight items can incur higher fees than you expect if you ignore their volume.

Volumetric weight vs actual weight: what's the difference?

Actual weight is the package’s mass; volumetric weight factors in dimensions. Carriers compare both and bill by the greater value.

Implementing volumetric weight in your ecommerce business

Steps to integrate volumetric weight into your shipping strategy

Update product listings with accurate dimensions.
Consult your carrier for their current volumetric divisor.
Choose packaging that minimises empty space—e.g. book wraps for variable height.
Regularly review and optimise shipping methods to reduce volumetric weight.

Tools and technologies to help with volumetric weight calculation

Many carriers provide online calculators. Platforms like Shiptheory integrate these calculations at checkout for seamless, accurate rates.

The financial benefits of using volumetric weight for your ecommerce business

How volumetric weight can reduce shipping costs

By optimising packaging to lower volumetric weight, you pay lower fees—especially significant when shipping large volumes.

The long-term financial advantages of understanding volumetric weight

Ongoing optimisation reduces wasted space and resources, boosting operational efficiency and your bottom line over time.

Overcoming challenges with volumetric weight in ecommerce

Common misconceptions about volumetric weight

It’s not just large items: any oddly shaped or spacious package—golf clubs, for instance—can trigger volumetric charges.

Tips for managing volumetric weight issues in your business

Continuously review and update packaging to minimise empty space.
Adjust product dimensions in your system to reflect true package size.
Stay informed of carrier policy or divisor changes.
Analyse shipping data to spot optimisation opportunities.

Understanding and leveraging volumetric weight can dramatically cut your shipping spend. Start optimising today to see the difference for your ecommerce business!

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