GCM checker
Check your loaded vehicle and caravan against your vehicle's gross combination mass (GCM), and your vehicle against its GVM once the caravan is hitched.
Enter your weights
Use weighbridge figures for your loaded vehicle and caravan, not brochure weights. Weigh each one unhitched, packed the way you travel.
Within your GCM, and your vehicle stays within its GVM with the caravan hitched.
This is a starting point, not a legal check. Your vehicle's towing capacity and tow ball limit also apply: check them with the tow checker. Check your state's towing rules too.