Towing capacity calculator: can my truck tow it?
Your real towing limit is the lowest of five numbers: the trailer rating, payload, GCWR, the hitch rating and the tongue limit. The trailer rating on the brochure assumes only a 150 lb driver and a 150 lb passenger. Everyone and everything else you add comes off it. Enter your numbers below to see which limit you hit first.
Check your trailer
Use the trailer's GVWR if you don't know the loaded weight. Dry weight is too low.
10 to 15% for bumper-pull, 15 to 25% for fifth wheel.
From your owner's manual or the maker's towing guide for your exact cab, engine and axle ratio.
The 'combined weight of occupants and cargo should never exceed' number on your driver's door-jamb sticker.
Coolers, tools, bed cover, generator, firewood.
Ball mount and hitch. A weight-distribution hitch is often 70 to 100 lb.
Within every rating you entered
- Tongue weight: 576 lb
- Within · Payload used: 1,196 of 1,610 lb (414 lb left)
- Within · Adjusted trailer rating: 5,980 lb (you're using 80.3%)
- Within · Truck weight with tongue load: 5,826 of 6,240 lb GVWR
Many trucks need a weight-distributing hitch at this weight. Ford's F-150 standard receiver is rated 5,000 lb and 500 lb tongue without one. Check your owner's manual.
You're using 80.3% of your adjusted trailer rating. Many RV groups suggest staying under 80%. That's a rule of thumb, not a rating.
Show the math
Tongue weight = trailer weight × tongue %.
Payload used = people + cargo + hitch hardware + tongue weight.
Adjusted trailer rating = trailer rating − (people + cargo + hitch hardware − 300 lb).
Combined weight = curb + people + cargo + hitch hardware + trailer weight, under GCWR.
How to use
- Find your truck’s max trailer rating for your exact configuration. Our vehicle pages list them by cab, engine and drive.
- Read the payload number on the sticker inside the driver’s door.
- Enter the trailer’s loaded weight. If you only know the dry weight, use the trailer’s GVWR instead.
- Add the people and gear that will ride in the truck, and the hitch hardware.
- Read the verdict. If any check fails, the result names it and shows how many pounds you’re over.
The formula
- Tongue weight = trailer weight × tongue %
- Payload used = people + cargo + hitch hardware + tongue weight
- Adjusted trailer rating = trailer rating − (people + cargo + hitch hardware − 300 lb)
- Combined weight = curb weight + people + cargo + hitch hardware + trailer weight, which must stay at or under GCWR
Example 1: a 2026 Tacoma TRD Off-Road with a 4,800 lb camper
Toyota rates the 2026 Tacoma TRD Off-Road Double Cab 5-ft bed 4x4 automatic at 6,300 lb towing and 1,610 lb payload. Two adults (360 lb), 200 lb of gear and a 60 lb ball mount: tongue weight is 576 lb (12% of 4,800). Payload used is 1,196 lb, leaving 414 lb. The adjusted trailer rating is 6,300 − (620 − 300) = 5,980 lb, so the camper uses 80.3% of it. Every check passes.
Example 2: same truck, 6,000 lb trailer, four people
Now the family comes along: 640 lb of people, 250 lb of gear, the same 60 lb hitch and a 6,000 lb trailer. Tongue weight is 720 lb. Payload used is 1,670 lb, 60 lb over the 1,610 lb limit. The adjusted trailer rating drops to 5,650 lb, so the trailer is 350 lb over. Toyota also lists a 640 lb maximum tongue weight for this truck, and 720 lb is 80 lb over that. The brochure number said 6,300 lb. The real answer is no.
What this calculator doesn't cover
It doesn’t know your truck. You enter the ratings, so a wrong rating gives a wrong answer. It doesn’t check rear axle weight (GAWR), tire load ratings, trailer brakes or state towing laws. It treats tongue weight as a percentage, which is an estimate. A scale ticket from a truck stop CAT scale is the only way to know what your setup really weighs.
Reference table: what each limit means
| Limit | Where to find it | What counts against it |
|---|---|---|
| Max trailer rating | Owner’s manual or the maker’s towing guide | Loaded trailer weight; reduced by people and cargo over 300 lb |
| Payload | Driver’s door-jamb sticker | People, cargo, hitch hardware, tongue weight |
| GVWR | Door-jamb sticker | Whole truck, including tongue weight |
| GCWR | Owner’s manual or towing guide | Loaded truck plus loaded trailer |
| Hitch rating | Label on the receiver and ball mount | Trailer weight and tongue weight; the lowest-rated part wins |
Tips
- Use the trailer’s GVWR, not its dry weight. Dry weight leaves out water, propane, batteries and everything you pack. A 30 gallon fresh tank alone is about 250 lb.
- Check the rating for your exact truck. On the 2026 F-150, the same engine can be rated thousands of pounds apart depending on axle ratio and tow package.
- Weigh the whole rig once at a truck stop scale. It costs about the price of a coffee and ends the guessing.
- If you’re near a limit, move gear from the truck to the trailer or the other way. It changes which limit you hit.
FAQ
How do you calculate your towing capacity?
Start with the trailer rating for your exact truck, then subtract the weight of people and cargo above the 300 lb the rating already assumes. Then check payload: people, cargo, hitch and tongue weight must fit under the door-jamb number. Finally, truck plus trailer must stay under GCWR. The lowest result is your real limit.
What is the 80/20 rule for towing?
Many RV groups suggest towing no more than 80% of your rated capacity to leave room for wind, hills and heat. It’s advice, not a rating. No manufacturer or federal rule requires it. Our calculator shows the percentage you’re using so you can decide, but it only fails a check when you go over an actual rating.
Does tongue weight count against towing capacity or payload?
It counts against payload, because the tongue sits on your truck. A 6,000 lb trailer at 12% puts 720 lb on the hitch, and those 720 lb come out of the same payload as your passengers. That’s why payload is often the first limit people hit, long before the brochure towing number.
What size truck do I need to pull 12,000 lbs?
A 12,000 lb trailer is at the very top of half-ton trucks. The 2026 F-150 is rated up to 13,500 lb and the 2026 Silverado 1500 up to 13,300 lb, but only in specific configurations with the max tow package. Once you add people, cargo and a 1,400 lb tongue, most half-tons run out of payload. Many owners choose a 3/4-ton truck for this weight.
Can I use dry weight to check if my truck can tow a camper?
No. Dry weight is the trailer as it left the factory, without water, propane, batteries, dealer options or your gear. Loaded campers often weigh 1,000 lb or more above dry weight. Use the loaded weight from a scale, or the trailer’s GVWR if you haven’t weighed it yet.
Can I find my towing capacity by VIN?
Ford’s own towing calculator uses your VIN for F-Series trucks. For other brands, the VIN gives you the exact engine, axle and trim, which you then match to the maker’s towing guide. The free government VIN decoder (NHTSA vPIC) shows the GVWR class but not towing capacity.
Related tools and pages
Sources
- Toyota, 2026 Tacoma full specifications (Weights/Capacities) · read 2026-10-19
- Ford, 2026 RV & Trailer Towing Guide · read 2026-10-20
- Chevrolet, 2026 Trailering Guide · read 2026-10-19
- Ram, 2026 Ram 1500 Payload & Towing chart · read 2026-10-19
- Truck Parts & Service, SAE J2807 overview · read 2026-10-19
- 49 CFR 571.110 (tire and loading placard) · read 2026-10-19
- National RV Training Academy, RV towing · read 2026-10-19
- USGS, How much does water weigh · read 2026-10-19
Written by Sikander Mushtaq. I build HitchMath's calculators and check every towing number against the manufacturer's own guide or spec page. Read how we calculate.
Last updated: 2026-10-19 · Editorial policy
HitchMath figures come from manufacturer documents and are for planning only. Your truck's door-jamb sticker, owner's manual and a scale ticket are the final word.