The rack own weight comes out of your roof rating before any cargo goes on. Enter your rating and rack weight for what is genuinely left, and why the limit while moving differs from the limit while parked.
Roof Rack Load Calculator — How Much Can You Really Put Up There?
The rack says 150 kg. Your roof says 75 kg. You can only load to the lower number. Calculate it correctly.
Enter your vehicle model and rack brand. The calculator applies the lower of vehicle roof rating and rack WLL to return the maximum safe roof load.
Overloaded roof racks raise the vehicle centre of gravity, increasing rollover risk on corners and in crosswinds. Exceeding the roof rating also voids vehicle warranty.
SUV and 4WD owners, overlanders, and tradespeople using roof storage systems.
- SAE J1849 roof rack load standards
- Manufacturer vehicle roof ratings
- FMVSS rollover stability data
Disclaimer: This tool is provided for educational and informational purposes only and does not constitute legal, safety, or professional advice. Sunferno Automotive Accessories cannot verify how products are installed, used, or attached in your specific vehicle or situation — proper installation, use, and securement are solely the responsibility of the user. Laws and regulations vary by jurisdiction and change over time; always confirm current requirements with your local authorities or a qualified professional. Sunferno products must be used strictly in accordance with manufacturer instructions and applicable regulations.