Size & weight guidelines

You need to know your parcel's size and weight to calculate postage costs and work out where it can be sent.

Maximum parcel size and weight

 Destination Maximum  weight Maximum length  Maximum dimensions 
Domestic 22kg  105cm  0.25 cubic metres 
International  20kg 105cm 140cm girth 

How we assess charges

Domestic parcels are charged according to actual weight or cubic weight, whichever is greater. International parcels are charged according to actual weight.

Please note: You do not need to cube Australia Post prepaid or flat rate satchels. 

Calculating cubic weight for domestic parcels Click to expand Click to collapse

Cubing is easy; just follow the 2 simple steps below:

1. Measure your parcel

The images below show you how to measure regular and irregular shaped parcels, and satchels.

How to cube a parcel

Handy tip: when measuring the length and width of your parcel, always use the maximum points.

2. Cube your parcel

The cubic weight is the parcel's volume in cubic metres, multiplied by 250. To work this out, use the formula below:

Height x length x width x 250 = cubic weight

For example: 0.5m X 0.3m X 0.4m
= 0.06m x 250
= 15kg cubic weight

If the actual weight of your parcel is 10kg but the cubic weight is 15kg, we'll charge you the cubic weight because it is greater.
But if the parcel's actual weight is 16kg, we'll charge you the actual weight because it is greater than the cubic weight of 15kg.

Please note: You do not need to cube Australia Post prepaid or flat rate satchels.

Calculating girth for international parcels Click to expand Click to collapse

The formula for working out the girth of your overseas parcel is:

Width + height x 2 = girth

For example: 30cm + 20cm
= 50cm x 2
= 100cm girth

Need help? If you need more assistance with parcel dimensions, visit your nearest Australia Post retail outlet or contact us.

* Some parcel services have specific size and weight restrictions. Please check the service for more details before lodging your article. Some business credit account customers also have different size and weight restrictions. Please contact your Account Manager for more information.

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