We use essential storage to run the site. With your permission, we use Google Analytics to understand site use and improve our services. We do not use analytics to collect the details you enter in calculators or forms.

Privacy Policy

Enter your vehicle, caravan or trailer specifications

Can’t find your vehicle, caravan or trailer in our tools? If you have the manufacturer or compliance plate figures, enter them here and we’ll review them for you. Older, modified, imported or custom vehicles are welcome.

Use the year in the applicable documentation. If you only know first registration, explain that in Comments.

Specification Figures (kg) — all optional, enter what you know

Copy the mass and its exact label from your source. Kerb and tare definitions can differ. In Comments, say whether this is a published figure or an actual weighing, and which fuel, accessories, occupants and cargo it includes. Leave unknown figures blank.

Gross Vehicle Mass — maximum loaded weight on the vehicle axles

Gross Combination Mass — maximum combined weight of vehicle + trailer

Maximum weight the vehicle can tow with trailer brakes

Maximum weight the vehicle can tow without trailer brakes

Permitted vertical load at the coupling, not the trailer towing mass. Check the applicable vehicle and fitted towbar/coupling documentation. Leave blank if unknown; do not infer it from towing capacity.

Maximum weight permitted on the front axle

Maximum weight permitted on the rear axle

Include exact grade/engine, source details and modifications. For measured mass, explain the fuel, occupants and equipment included. Do not add an accessory again if it is already included in that weighing.

We’ll use this to return a result or request clarification. No VIN or registration required.

These are submitted figures for review, not verified ratings or a clearance to tow. We may request clarification before using them in an assessment.

Other free resources: