Cómo Se Calcula El Peso Volumétrico En Correos

When sending packages through Correos (Spanish postal service), the shipping cost is often based on the volumetric weight rather than the actual weight of the package. This guide explains how to calculate volumetric weight for mail shipments in Spain, including the formula, assumptions, and practical examples.

What is volumetric weight?

Volumetric weight is a method used by postal services to calculate the shipping cost of packages. Instead of using the actual weight of the package, the service calculates a "volumetric weight" based on the package's dimensions. This is particularly useful for lightweight but bulky packages that might be expensive to ship by weight alone.

The volumetric weight is calculated by multiplying the package's length, width, and height (in centimeters) and then dividing by a divisor factor. The divisor varies depending on the postal service and the type of shipment.

In Spain, Correos typically uses a divisor of 5000 for standard mail shipments. This means that every 5000 cm³ of volume equals 1 kg of volumetric weight.

How to calculate volumetric weight

The formula for calculating volumetric weight is straightforward:

Volumetric Weight = (Length × Width × Height) ÷ Divisor

Where:

Length, Width, Height - Dimensions of the package in centimeters (cm)
Divisor - The factor used by Correos (typically 5000 for standard mail)

The result is in kilograms (kg). If the volumetric weight is greater than the actual weight of the package, the shipping cost will be based on the volumetric weight.

For international shipments, the divisor might be different. Always check with Correos or the specific postal service for the correct divisor.

Example calculation

Let's say you have a package with the following dimensions:

Length: 30 cm
Width: 20 cm
Height: 15 cm

Using the standard divisor of 5000:

Volumetric Weight = (30 × 20 × 15) ÷ 5000

Volumetric Weight = 9000 ÷ 5000

Volumetric Weight = 1.8 kg

If the actual weight of the package is 1.5 kg, the shipping cost will be based on the volumetric weight of 1.8 kg.

Comparison table

Here's a comparison of actual weight vs. volumetric weight for different package sizes:

Dimensions (L×W×H cm)	Actual Weight	Volumetric Weight
30×20×15	1.5 kg	1.8 kg
40×30×20	2.0 kg	2.4 kg
50×40×30	3.0 kg	3.0 kg

Frequently Asked Questions

What is the difference between actual weight and volumetric weight?

Actual weight is the physical weight of the package, while volumetric weight is calculated based on the package's dimensions. The shipping cost is based on whichever is greater.

Can I use the volumetric weight calculator for international shipments?

The basic formula is the same, but the divisor might be different for international shipments. Always check with the specific postal service for the correct divisor.

What happens if the volumetric weight is less than the actual weight?

The shipping cost will be based on the actual weight of the package. Volumetric weight is only used when it's greater than the actual weight.