Vehicle Load & Weight Simulator
Quickly model how passengers, gear, upgrades and rooftop tents affect your total weight, front and rear axle loads, and roof loading — before you hit the weighbridge.
Vehicle Load & Weight Simulator
Model how your gear, passengers and upgrades affect total weight, axle loads and basic stability.
Enter your rig’s ratings, lift and trip load, then see if you’re running within safe limits.
Vehicle & Load Inputs Setup
Common Upgrades & Racks Quick add
Tick the big-ticket items you’ve fitted. These use typical weights and mounting positions and can be fine-tuned with manual items.
Trip Load Items Custom
Add passengers, water, fuel, cargo and accessories. Position is measured from the front axle centre towards the rear (+) or forwards (−).
No custom items added yet. Start by adding passengers, water, fuel, or cargo.
Load Results Live
Frequently Asked Questions FAQ
Common questions about vehicle weight, axle loading and safe overlanding setup.
GVWR (Gross Vehicle Weight Rating) is the maximum safe weight your vehicle can carry, including passengers, fuel, gear, accessories and upgrades. Exceeding GVWR can result in poor braking performance, suspension damage, tyre failures and insurance implications.
Front and rear axle ratings (GAWR/FGARW/RGARW) are the maximum load each axle is designed to safely support. You can be under GVWR but still overloaded on one axle, which is dangerous and may be illegal in some regions.
No. A lift kit raises your centre of gravity but does not increase GVWR or axle ratings. More lift usually means increased body roll and reduced stability on side-slopes. The simulator adds advisory notes when lift starts to affect stability.
This tool uses static load calculations based on lever-arm physics (weight × distance from axle). It can be very close to real-world results when your measurements are correct, but you should always confirm with certified scale readings during an actual weigh-in.
Roof weight is high above the centre of gravity, which increases the risk of rollover. Many vehicles have roof ratings between 50–100 kg dynamic. A rack + RTT + awning can easily exceed this. The simulator flags when roof load is above 80% or 100% of your entered rating.
Keep the heaviest items low and centred: fuel, water, recovery gear, tools and spare parts should ideally sit:
• close to the middle of the wheelbase
• between the axles
• below window height
This improves handling, braking and stability on off-camber tracks.
Measure from the front axle centre backwards in millimetres:
• 0 mm = over the front axle
• wheelbase = over the rear axle
• negatives = overhanging forward
• beyond wheelbase = rear overhang
When occupied, a RTT can add 150–250 kg of live load on the roof. This is not a dynamic driving load, but it still affects stability at camp. Always follow manufacturer guidance and avoid soft or uneven ground.
Not yet. A dedicated Towing Load & Towball Weight Calculator is planned for a future update so you can simulate GVM, towball transfer and trailer load distribution.
Overlanders, 4WD tourers, off-road travellers, van-lifers, and anyone adding gear or modifications who wants to stay safe, compliant and balanced on long journeys.