Calculators for Transport Operators

There are a range of calculators available to assist transport operators in ensuring their vehicles and loads are safe and meet the relevant requirements.

Tow Coupling D-Rating Calculator

The D-Rating Calculators allow transport operators to check and ensure their tow couplings are sufficiently rated. A vehicle combination fitted with insufficiently rated tow couplings can result in catastrophic consequences.

Disclaimer: The results provided by the calculators are only as accurate as the data that is inputted by the user. Each field in the D-Rating Calculator must be completed for accurate results. Fifth wheel calculators are in accordance with AS 4968.1:2023 and drawbar calculator with AS 2213.1:2022.

 Use the D-Rating Calculators:

 

Aggregate Trailer Mass (ATM) Calculator

ATM Calculators are provided to assist transport operators to help ensure their trailers are sufficiently rated. ATM is the rating for a trailer, referring to the maximum trailer mass. Transport operators are obliged to ensure their trailers are suitably rated for the load being carried.

 Use the ATM Calculators:

 

Acknowledgement of Country

The Government of Western Australia acknowledges the traditional custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders both past and present.

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