How it works
A common rule of thumb is keeping trailer weight under 80% of your vehicle's max towing capacity. Also factor in tongue weight (~12.5% of trailer weight) against your vehicle's payload capacity.
FAQ
Q. What is tongue weight?
A. It's the downward force the trailer exerts on the hitch — typically 10–15% of trailer weight; this tool assumes 12.5%.
Q. Why follow the 80% rule?
A. Loading right up to the manufacturer's max leaves no safety margin for braking distance and sway.