Australian Tow Ball Weight Calculator

Master Your Towing Setup: A Practical Guide to Using Our Tow Ball Weight Calculator

Getting your tow ball weight right isn't just paperwork - it's your safety net on Australian roads. Our calculator simplifies the math while keeping you compliant with national towing standards. Here's how to use it like a pro:

Step 1: Know Your Numbers

Start with your trailer's Total Laden Mass (ATM) - that's your fully loaded weight including gear and supplies. This number should match your trailer's compliance plate. No guessing - use a certified weigh bridge if unsure.

Step 2: Measure Your Distances

Grab your tape measure. You'll need two critical measurements:

• Trailer Axle to Tow Ball: Measure from the axle center to where the tow ball meets the trailer coupling
• Tow Ball to Weight Point: Measure from the tow ball to where you'll measure the weight (usually the jockey wheel position)

Step 3: Crunch the Numbers

Enter your figures into the calculator. The magic happens when you click 'Calculate'. You'll instantly see:

• Your actual tow ball weight in kilograms
• A visual progress bar showing where you sit in the 9-11% safety zone
• A clear safety rating (green for good, red for adjustments needed)

Why 10% Matters

Australian regulations recommend keeping your tow ball weight between 9-11% of total trailer mass. This sweet spot:

• Prevents dangerous trailer sway
• Maintains proper steering control
• Keeps within vehicle manufacturer limits

Real-World Tips

If your numbers are off:

1. Check measurements twice - a 10cm error changes calculations
2. Redistribute load rather than adding ballast
3. Remember that water tanks and fuel loads affect weight distribution

Bookmark this calculator on your phone for roadside checks. It works offline once loaded, making it perfect for last-minute adjustments at the boat ramp or caravan park.