1. What is Cubic Weight?

Cubic weight (also known as volumetric weight) is a pricing technique used by Australia Post and other courier companies to account for the space a package occupies in relation to its actual weight. It ensures that lightweight but bulky items are priced appropriately.

2. How Does the Calculator Work?

The calculator uses the Australia Post cubic weight formula:

Where:

• \( L \) — Length in centimeters
• \( W \) — Width in centimeters
• \( H \) — Height in centimeters
• 5000 — Australia Post cubic divisor

Explanation: The formula calculates the volumetric weight by multiplying the three dimensions and dividing by 5000, which is the standard conversion factor used by Australia Post.

3. Importance of Cubic Weight Calculation

Details: Australia Post charges based on whichever is greater - the actual weight or the cubic weight. This ensures fair pricing for both small heavy items and large lightweight items.

4. Using the Calculator

Tips: Measure your package dimensions in centimeters. Enter length, width, and height. All values must be positive numbers. The result will be in kilograms.

5. Frequently Asked Questions (FAQ)

Q1: Why does Australia Post use cubic weight?
A: Cubic weight pricing ensures that carriers are fairly compensated for transporting bulky items that take up significant space in vehicles and aircraft.

Q2: What is the 5000 divisor based on?
A: The 5000 divisor represents the conversion from cubic centimeters to kilograms, based on the density that Australia Post uses for pricing calculations.

Q3: How do I measure package dimensions correctly?
A: Measure the longest points in each dimension - length, width, and height. Round up to the nearest centimeter.

Q4: What if my package is irregularly shaped?
A: For irregular shapes, measure the dimensions of the smallest rectangular box that the item would fit into.

Q5: When is cubic weight used instead of actual weight?
A: Australia Post will charge based on the cubic weight if it exceeds the actual weight of the package.