Knowing what your van actually weighs — fully loaded for a trip — is the difference between legal and illegal, safe and unsafe. The compliance plate tells you the maximum; a weighbridge tells you the truth. Here's how to do it properly and where to go.

Why Loaded Weight Matters More Than Tare

The Tare figure (what the van weighed leaving the factory) isn't what you tow. You tow it loaded — full water, full gas, full fridge, all your gear. That can easily add 300–500kg over Tare, and many caravans run very close to (or over) their ATM without the owner knowing.

Being overweight isn't just a legal issue. It overloads tyres, brakes, suspension and chassis components — and voids insurance claims if you have an accident.

What You're Actually Measuring

A proper weigh-in gives you three numbers:

• GTM (Gross Trailer Mass) — weight on the van's axles when hitched up.
• Ball Weight — weight transferring to the tow ball.
• ATM (Aggregate Trailer Mass) — GTM + Ball Weight = total loaded van weight.

You also want the tow vehicle weighed separately so you can check your GCM (Gross Combination Mass) — vehicle + van combined.

How to Get a Proper Weigh-In

Option 1 — Public Weighbridge

Australia has a network of public weighbridges run by state agencies and private operators. Most charge a small fee ($10–$30 typical). To get all three numbers in one visit:

1. Drive the loaded van + tow vehicle onto the bridge fully: records GCM.
2. Drive forward so only the van is on the bridge (still hitched): records GTM.
3. Unhitch and pull the tow vehicle off, leaving only the van: records ATM.
4. Ball weight = ATM − GTM.

Call ahead — some bridges have rules about unhitching on the platform, and some prefer specific times.

Option 2 — Caravan-Specific Weigh Service

Some caravan dealers, RV service centres and dedicated mobile weigh services will come to you or have you visit. They use individual wheel scales and can give you a per-axle breakdown plus ball weight — much more detailed than a public bridge.

Option 3 — Ball Weight Scale (Quick Check Only)

A small ball-weight scale (around $50–$200) lets you check ball weight at home. Useful for tracking how packing changes things, but doesn't give you ATM or GCM.

Where to Find a Weighbridge — By State

Victoria

• VicRoads operates registered weighbridges across the state.
• Many transport depots and recycling centres have public weighbridges.
• National network: search the National Public Weighbridge Directory for your nearest.

New South Wales

• Transport for NSW publishes a list of certified public weighbridges.
• Quarries, recycling depots and many regional councils have public bridges.

Queensland

• TMR (Transport and Main Roads) lists certified weighbridges.
• Many sugar mills, grain handling sites and council depots have public scales.

South Australia

• DIT operates and lists public weighbridges.
• Several caravan parks in Adelaide and along the major touring routes have on-site scales.

Western Australia

• Main Roads WA lists certified public weighbridges.
• Mining and quarry operations in regional WA often have public access scales — call ahead.

Tasmania

• Transport Tasmania publishes weighbridge locations.
• Smaller state — fewer options but most major towns have access.

NT & ACT

• NT: MVR lists weighbridges; Darwin and Alice Springs have public access.
• ACT: limited public options; many Canberrans use NSW weighbridges across the border.

Mars Tip: pick a weighbridge near home so you can check your weights regularly, not just once. Loaded weight changes with every trip.

When to Weigh

• First major trip after pickup — establishes your real loaded baseline.
• After adding anything significant — solar blanket, generator, new batteries, water tanks topped up differently.
• Before any extended remote trip — Cape, Kimberley, Simpson.
• Annually — gear creeps in over years and people don't notice.

What to Bring

• Tow vehicle and van loaded exactly as you'd travel — full water, full gas, fridge stocked, all gear stowed.
• Full fuel tank in the tow vehicle.
• Passengers in the tow vehicle (or note their combined weight to add later).
• Cash or card for the weighbridge fee.
• Notepad or phone to record each number.

What to Do With the Numbers

Compare to:

• Van ATM (on the compliance plate) — must not exceed this.
• Van GTM (on the compliance plate) — must not exceed this.
• Tow vehicle tow ball download rating — your measured ball weight must not exceed this.
• Tow vehicle GVM — loaded vehicle weight (incl. ball weight) must not exceed this.
• Tow vehicle GCM — combined weight must not exceed this.

If You're Overweight

1. Don't panic — but don't tow it that way.
2. Identify what's heavy and not essential. Water is the easiest — only run with as much as you need.
3. Move weight forward or back to fix ball weight (we cover this in Ball Weight: How Packing Changes Everything).
4. If you're consistently over, look at GVM Upgrades for Your Tow Vehicle or talk to us about whether a different model in our range would suit better.

The Bottom Line

Weighing your van costs maybe $30 and an hour. It's the single best protective step you can take — for safety, for insurance, for your warranty. Do it once before your first big trip, then again whenever the setup changes.

Related: Weights 101: ATM, GTM & Ball Weight · Payload Planning: What Really Fits in 300kg · Ball Weight: How Packing Changes Everything