Australian Caravan Tow Ball Weight Calculator
* According to Australian Standard AS 4177-2014
How to Calculate Caravan Tow Ball Weight: An Essential Guide for Australian Travellers
Getting your caravan's tow ball weight right means the difference between a smooth trip and dangerous swaying. This simple guide shows exactly how to use our calculator and why it matters for your safety on Australian roads.
What You'll Need:
- Your caravan's Aggregate Trailer Mass (ATM) - find this on the compliance plate
- A tape measure
- 5 minutes of your time
Step-by-Step Calculation:
- Measure twice: From the center of your caravan's axle to the tow ball. Most caravans need 100cm overhang - check your manufacturer's specs.
- Plug in your numbers: Enter your ATM and measurements into our calculator
- Check the results: Look for the green safe zone (10-15% of ATM). Red means you need to adjust your load.
Why Australian Percentages Matter
Our 10-15% rule isn't random. It's calculated for:
- Outback corrugations
- Steep mountain descents
- Sudden kangaroo stops
When to Recalculate:
- After loading new gear
- When changing water tank levels
- Before any long trip
Pro Tips:
- Use a bathroom scale under the jockey wheel for manual checks
- Heavy items go forward of the axle
- Water tanks should be 75% full when travelling
Bookmark this calculator and check your figures every trip. Safe towing starts with proper weight distribution - your family and other road users will thank you.