Towing
Verify you're under GCWR, GVWR, and rear-axle limits before hooking up. Calculates remaining payload, tongue weight target (10-15%), and effective towing capacity for your tow vehicle.
A towing capacity calculator checks your rig against GCWR, GVWR, and payload using curb weight, loaded trailer weight, and tongue weight (typically 10–15% of trailer weight). “Max tow” on the tailgate is marketing unless you still have payload and axle capacity left after passengers, gear, and hitch weight.
Travel trailer and boat owners use it before a long grade to see remaining payload. Half-ton and HD truck buyers verify whether a loaded 6,500 lb trailer fits the door-sticker limits for their exact VIN.
A good outcome: clear headroom or red warnings on GCWR/payload — then you still confirm hitch class, tire rating, brake controller, and trailer brakes separately. Pair with fuel cost for the haul and gear ratio for cruise RPM with the load.
Use GCWR, GVWR, and curb weight from the door sticker or owner’s manual for your configuration — not a generic brochure max.
Trailer weight should be loaded ready to travel (water, propane, cargo).
Tongue weight default 12% is a starting point; adjust 10–15% per hitch manufacturer and trailer balance.
Receiver rating, ball mount, and rear axle GAWR are separate limits — the lowest number wins.
Max trailer (GCWR method) ≈ GCWR − Curb weight
Tongue weight = Trailer weight × (Tongue % ÷ 100)
Payload remaining = GVWR − (Curb + Tongue)
Always confirm receiver rating, brake controller, tires, and trailer brakes independently of this estimate.
Max trailer (GCWR method) ≈ GCWR − curb weight. Tongue = trailer × (tongue % ÷ 100). Payload remaining ≈ GVWR − (curb + tongue).
Example: GCWR 15,000 lb, curb 5,200 lb → about 9,800 lb trailer cap before passengers and cargo reduce margin.
Downgrades for altitude, missing tow package, or wrong axle ratio are not modeled — read the towing guide for your engine and gear.
Ford publishes maximum trailer tow ratings for the F-150 up to 13,500 lb when properly equipped (engine, axle, and tow package per Ford’s towing guides). Your door sticker lists GVWR and GCWR for your exact VIN — always use the lower of hitch, axle, tire, and sticker limits.
A 6,500 lb loaded travel trailer at 12% tongue adds about 780 lb on the hitch. Enter curb weight, GVWR, and trailer weight to see remaining payload — tongue weight counts against rear GAWR and payload, not just “max tow” marketing.
GCWR and max tow marketing ignore payload, tongue weight, and hitch class. You can be under tow cap but over GVWR when passengers and gear fill the cab.
Grades, wind, and trailer brakes matter as much as the number on the tailgate.
Yes — hitch weight on the truck is payload, often limiting trailer size before tow rating.
Many owners target loaded trailer ≤ 80% of max tow for margin on grades and heat — not a legal rule, a comfort guideline.
For many bumper-pull travel trailers over ~5,000 lb loaded, a WDH restores front axle load — separate from GCWR math.
Pair this calculator with these related tools in the garage — same session, no signup.