Australian Tow Ball Weight Calculator

Total Trailer Mass (kg):

Load Distribution (%):

Tow Ball Weight (kg):

Vehicle Towing Capacity (kg):

Safety Standard:

Mastering Your Tow Ball Weight Calculations: An Australian Guide

Getting your tow ball weight right isn't just about compliance - it's about keeping our roads safe. Whether you're hauling a caravan through the Nullarbor or moving equipment across Melbourne, this guide shows you how to use our calculator spreadsheet effectively.

Why Proper Weight Distribution Matters

Australian law requires tow ball weights between 5-15% of total trailer mass. Our spreadsheet helps you:

Avoid fishtailing at highway speeds
Prevent premature trailer brake wear
Maintain legal compliance across states

Step-by-Step Calculation Guide

1. Total Trailer Mass: Load your trailer completely before measuring. Include water tanks, gas bottles, and all gear.

2. Load Distribution: Start with 10% (standard for most vehicles). Adjust between 5-15% using the arrows.

3. Towing Capacity: Check your vehicle's manual - don't guess this number.

Pro Tips for Australian Towers

- State Variations: NT requires additional safety margins for remote travel
- Caravans: Measure weights with full water tanks if traveling to drought areas
- Seasonal Adjustments: Recalculate when adding/removing equipment

When to Seek Professional Help

Use our calculator spreadsheet as a first check, but always:
1. Verify with physical measurements
2. Consult your mechanic for vehicle-specific limits
3. Get certified weighbridge checks for heavy loads

Remember: No spreadsheet replaces common sense. If something feels wrong on the road, stop and reassess. Safe towing protects everyone - take the extra minute to calculate properly.