Australian Trailer Towing Calculator
* Complies with ADR 43/04 vehicle standards. Max trailer mass = Vehicle GVM x 1.5 (unless manufacturer specifies lower limit). Tow ball weight must be 10% of trailer mass.
How to Use the Trailer Towing Calculator for Safe Australian Towing
Towing safely in Australia requires understanding your vehicle's limits and complying with national standards. Our trailer towing calculator simplifies complex regulations into three easy steps:
Step 1: Know Your Vehicle's Mass
Find your vehicle's Gross Vehicle Mass (GVM) in the owner's manual or compliance plate. This is the maximum loaded weight your vehicle can legally weigh. Enter this in the first field.
Step 2: Calculate Trailer Weight
Include your trailer's Aggregate Trailer Mass (ATM) - the total weight when fully loaded. Remember this includes all cargo, water tanks, and gas bottles. Enter this in the second field.
Step 3: Measure Tow Ball Weight
Use a tow ball scale to measure the downward force at the hitch. Australian law requires this to be 10% of the trailer weight. Enter this measurement in the third field.
Understanding Your Results
The calculator checks three key requirements:
- 1.5x Rule: Trailer mass shouldn't exceed 1.5x vehicle mass
- 10% Tow Ball Weight: Critical for stable towing
- Gross Combination Mass: Total vehicle + trailer weight
Always cross-check with your vehicle's specific towing capacity from the manufacturer. Different states may have additional requirements - check local transport authority guidelines before long trips.
Remember: This calculator covers baseline national standards. For heavy loads or specialized trailers (caravans, boat trailers), consult a certified towing specialist. Safe towing protects everyone on the road.