Use this RV payload calculator to see whether your truck can carry its passengers, gear, and your trailer’s tongue weight. Enter the numbers from your door sticker and see how much payload you have left, plus the heaviest trailer it allows.
How to Use the Calculator
Enter your truck’s payload, the weight of everyone riding in it, and the gear you carry in the cab and bed. Then add your trailer’s weight, choose travel trailer or fifth wheel, and press Calculate. The calculator estimates the tongue weight for you, so you never type it in.
The result is one of three verdicts. Within Payload means you are under 90 percent of your payload, Close to the Limit means you are at 90 percent or more, and Overloaded means your load is heavier than your payload. It also shows your estimated tongue weight and the heaviest trailer your payload allows, so you can shop with a number.
What Is Payload?
BigRentals defines payload as the most weight your truck can carry, equal to its GVWR minus its curb weight. That covers passengers, cargo, and the weight the trailer puts on your hitch, which is why payload is usually the first limit a towing family runs into.
Where to Find Your Payload
Look for the yellow sticker on the driver’s door jamb. The Ram owner’s manual explains that this placard sets one combined limit for occupants, cargo, and trailer tongue weight. A brochure number may be for a different trim, so trust your own sticker.
Tongue Weight Counts Against Payload
The trailer pushes down on your hitch, and that weight rides on your truck. For a travel trailer, BigRentals recommends around 10 to 15 percent of the loaded trailer’s weight. A fifth wheel presses down harder, and TowingSpecs says pin weight is typically 15 to 25 percent of the loaded trailer weight and counts fully against payload.
The calculator estimates tongue weight at 13 percent for a travel trailer and 20 percent for a fifth wheel. Those are planning numbers, so weigh your own trailer when you can. Our tongue weight calculator shows the full range for your trailer.
How to Calculate Payload for Towing
The math is plain subtraction. Start with the payload on your sticker, then subtract the weight of the people, the cargo, and the tongue weight. What is left is your room.
The calculator’s starting numbers show how it works. A 1,600 lb payload minus 350 lb of people and 200 lb of cargo leaves 1,050 lb. A 6,500 lb travel trailer adds about 845 lb of tongue weight, so you use 1,395 lb, or 87 percent, and have 205 lb to spare.
Why Payload Runs Out Before Towing Capacity
BigRentals points out that you can stay within your towing capacity and still overload the truck. Picture a truck with a 9,000 lb tow rating but only 1,200 lb of payload. After 550 lb of people and gear, 650 lb is left, and at 13 percent that supports a trailer of about 5,000 lb.
That is far below what the tow rating alone suggests. Check both limits, and use our towing capacity calculator for the trailer side while this one covers what your truck carries.
What to Include in Your Numbers
People and pets. Count everyone who rides in the truck, at their actual weights, including kids and the dog. Guessing low is the most common mistake.
Cargo in the cab and bed. Coolers, bikes, tools, and firewood add up fast, and so does a bed cover. Weigh the heavy items once and write the numbers down.
Hitch hardware. Your hitch rides on the truck, so include its weight with your cargo. A fifth-wheel hitch is heavy, and a weight-distribution setup adds hardware too.
Add-ons. Aftermarket bumpers, toolboxes, and racks add weight to the truck, so count them as cargo too. They are easy to forget because they are always on the truck.
If the Result Says Overloaded
Take weight out of the truck first. Leave heavy extras at home, and move gear into the trailer only if it fits within the trailer’s own cargo capacity, which is on its weight label.
Still over? Choose a lighter trailer or a truck with a higher payload. Once you load up for a trip, a public scale shows your actual weight, which beats any estimate.
Your Next Step
Find the yellow sticker on your door jamb, write down the payload, and run your travel-day load through the calculator. If you land at Close to the Limit, check your hitch load next, and read our beginner’s guide for the towing terms in plain English.