WLL CALCULATOR — KNOW YOUR SAFE LOAD LIMIT
Enter your break strength. Get the true Working Load Limit — the safe capacity — in seconds.
WLL Calculator — Find the Working Load Limit for Any Strap or Chain
The number on the label and the number that matters in a DOT inspection are not always the same. Calculate the right one.
Enter your strap or chain grade, width, and construction. The calculator returns the FMCSA-applicable WLL and the corresponding break strength.
FMCSA inspectors cite by WLL — not break strength, not the number you think sounds safe. Know your equipment’s actual rated limit.
Drivers, fleet operators, riggers, and anyone responsible for cargo securement on public roads.
- FMCSA 49 CFR §393.106
- WSTDA WLL rating standards
- ASME B30.9 safety factors
CALCULATOR
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.
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