Teorio
Gross weight and curb weight
Gross weight and curb weight are often confused, but the difference determines how much you can actually load into the car. Here we explain the concepts and show where to find the figures for your specific vehicle.
Rules & Regulations
- Curb weight describes the vehicle's weight in ready-to-drive condition; gross weight (maximum permitted total weight) is the maximum allowed combined weight of the vehicle including cargo, driver and passengers.
- You must not exceed the manufacturer's stated gross weight — it is the driver's responsibility to ensure the current total weight is less than or equal to the permitted gross weight.
- Payload is the difference between gross weight and curb weight; it indicates how much cargo, passengers and extra equipment you can add without exceeding the gross weight.
- Figures for curb weight, gross weight and any axle weight limits are found in the vehicle's documents and/or on the manufacturer's data plate — these values apply when checking the permitted load.
- During traffic checks (for example if the police weigh the vehicle) overloading can lead to fines, suspension or revocation of heavy-vehicle driving privileges, or orders to load/unload to achieve an approved weight.
- Curb weight includes a fuel tank filled to 90 percent, other operating fluids (coolant, engine oil, brake and washer fluid), standard equipment such as spare wheel/tool kit/warning triangle, and a standard driver weight of 75 kg.
Tips for Drivers
- Check the registration certificate and the owner's manual before loading — add up the weight of family, luggage, towing accessories and any cargo to compare with the payload.
- If you are unsure of the vehicle's current total weight, use a car scale or weighbridge to weigh the fully loaded vehicle before long trips or when towing a heavy trailer.
- Place heavier items low and close to the vehicle's center/seat area for better stability and to avoid overloading an axle; uneven distribution can worsen handling even if the total weight is under the gross weight.
- Remember that fuel, tools, child seats, spare wheel and roof box count as load — leave unnecessary items at home if you need to maximize the allowed payload.
Common Mistakes
- Confusing curb weight with payload — curb weight is what the car weighs ready to drive, payload is how much extra weight you can add.
- Forgetting that passengers and fuel are included in the load — many only count luggage and thereby exceed the payload without noticing.
- Assuming distribution does not matter — even if the total weight is under the gross weight, incorrect loading can overload an axle or create dangerous driving characteristics.
Exam Tip
On the theory exam you may be given a task to calculate the permitted load: state that payload = gross weight − curb weight and ensure you include driver, passengers and fuel in the calculation.
Did You Know?
Manufacturers and registration documents often state payload as gross weight minus curb weight, so you can easily calculate how many kilograms you are allowed to carry by subtracting these two values.
Frequently Asked Questions
Where can I find the curb weight and gross weight for my car?
The most common places are the registration certificate, the vehicle's owner's manual and the manufacturer's data plate on the car. In some cases the information is also on the door pillar or in the car's digital documentation.
Are child seats and tools counted as load?
Yes. All extra weight beyond the vehicle's curb weight — including child seats, tools, spare wheel and roof box — counts as cargo and must be considered against the payload.
What happens if I drive above the gross weight?
Driving above the gross weight is illegal and can lead to fines, orders to unload and in some cases reports to insurers or authorities if it is judged dangerous or repeated violations occur.
Does the gross weight also apply when I tow a trailer?
Yes. Both the car's and the trailer's own gross weights apply; you must also ensure that the permitted weights and towing capacities of the car and trailer are not exceeded. (Details for combinations may vary depending on vehicle type and driving licence category.)
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