RV Now Free Weight Tool
Free · 2-minute check

Are you within your tow limits?

Get an instant overview of where you sit against ATM, GVM, GCM and ball weight — colour-coded the moment something's close or over. Plus a free personalised breakdown of what each weight means for your setup.

Start my weight check
2min
From first click to full breakdown
4
Compliance limits checked at once
$0
To use this tool, forever
$175
For the real calibrated weighing
ATM Pending
—kg —
GVM Pending
—kg —
GCM Pending
—kg —
Ball Pending
—kg —
01 / 03 · Your caravan

Pull the compliance plate.

Usually riveted to the A-frame or front wall of your van. We need three numbers — tare, ATM, and the ball rating if it's shown.

Identification Optional
Compliance plate Required
kg
kg
kg
02 / 03 · Tow vehicle

Now the vehicle towing it.

From the vehicle's compliance plate (under the bonnet or on the driver's door pillar) plus the owner's manual for max tow and ball ratings.

Quick-fill Optional
Compliance plate Required
kg
kg
kg
kg
kg
03 / 03 · How loaded

Be honest about the load.

This is where most caravanners discover they're heavier than they thought. Water alone adds 200kg+ on a full van.

In the van
L
L
kg
kg
In the tow vehicle
kg
kg
kg
Your results

Calculating...

Recommended next step

Get a calibrated weighing — $175

Real-world weights vary 50–100kg from estimates. A 30-minute calibrated weighing at your van gives you the actual numbers and a compliance report.

Book my weighing
Unlock your full report

Want the detailed breakdown?

The 4 numbers above are the quick view. Drop your details and we'll show you what each weight means for your specific setup — plus send a PDF you can keep.

Plain-English explanation of every measure
Specific recommendations for your numbers
PDF report you can save or print
One follow-up to see if you'd like to book

No spam, no sharing. Just your report and one follow-up. Unsubscribe anytime.

Your full report

What each weight means for you.

Personalised breakdown based on your numbers. We've also emailed you a PDF copy.

How accurate is this? The calculator uses your input numbers and a 10% ball-weight estimate where not provided. Real-world weights typically vary 50–100kg from paper because tare values get outdated and accessories add up. For legal and insurance purposes — and your own peace of mind — we strongly recommend a calibrated weighing before any major trip. This tool is for educational guidance only.

Questions caravanners ask.

It's accurate to your inputs. The numbers from your compliance plate are factory specs — real-world weights typically vary 50–100kg from estimates because tares get outdated, accessories add up, and water/gas/load estimates are rarely exact. Use the calculator to flag potential issues. Use a calibrated weighing to confirm.
ATM (Aggregate Trailer Mass) is the max weight of your loaded caravan, including the ball weight pressing on the tow vehicle. GTM (Gross Trailer Mass) is just the weight on the van's wheels when coupled. GCM (Gross Combination Mass) is the max combined weight of vehicle + caravan together.
Too much ball weight makes the back of your tow vehicle sag, lifts the front, ruins steering and braking. Too little makes the caravan unstable and prone to sway. Most vans run best at 9–11% of total loaded weight on the ball. Vehicles have a max ball rating — exceeding it is a real safety and insurance risk.
We come to your van with calibrated wheel scales. Takes about 30 minutes. We measure each wheel of the caravan and tow vehicle individually, give you the real numbers for ATM, GVM, GCM, ball weight, and per-axle loads — plus a compliance report you can keep for insurance and warranty.
Adelaide metro + 90km radius (Adelaide Hills, Barossa, Murray Bridge, Victor Harbor, Gawler). For other states, register your interest and we'll let you know when we're in your area.