How to Calculate Tow Ball Weight: Your Complete Australian Guide
Towing Weight Calculator
Mastering Tow Ball Weight Calculations for Safe Australian Towing
Proper tow ball weight calculation is crucial for safe towing on Australian roads. Follow these steps using our calculator:
Step 1: Weigh Your Load
Start by measuring your fully loaded trailer at a weighbridge. This gives your total trailer mass (ATM). Never estimate - incorrect weights cause dangerous swaying at highway speeds.
Step 2: Apply the 10% Rule
Australian Road Rules (ADR 43/04) recommend 10% of total trailer weight as tow ball weight. For a 2,000kg caravan, this means 200kg on the tow ball. Our calculator uses this standard but allows 5-15% adjustments for specific setups.
Step 3: Verify Vehicle Capacity
Check your vehicle's tow ball weight limit in the owner's manual. Exceeding this can damage your vehicle and invalidate insurance. Most passenger vehicles handle 100-350kg.
Pro Tips:
- Weigh front/rear trailer axles separately for accuracy
- Recheck weights after packing
- Allow for water tanks and gas bottles
- Never exceed your vehicle's maximum tow rating
Why It Matters
Correct tow ball weight prevents trailer sway, maintains steering control, and keeps you legal. Police can issue fines for improper loading, and insurers may deny claims for overweight trailers.