Guide
RV weight terms explained: GVWR, UVW, CCC, payload and more
RV spec sheets are full of weight acronyms. Here’s what each one means, which numbers to compare, and how they fit together, using a real trailer’s published numbers.
| Term | What it means | Why it matters |
|---|---|---|
| GVWR | The most the RV may weigh, fully loaded. | Compare with your tow rating (80% rule). |
| UVW | The RV empty from the factory. | A starting point only. |
| CCC | GVWR minus UVW: how much you can add. | Water, propane, gear and options all count. |
| Hitch weight | Weight a bumper-pull trailer puts on the hitch, about 10–15% of loaded weight. | Counts against truck payload. |
| Pin weight | Fifth-wheel weight on the bed hitch, about 15–25%. | Usually decides fifth-wheel payload. |
| Payload capacity | What the truck can carry: truck GVWR minus curb weight. | Passengers + cargo + hitch + tongue/pin weight. |
| Tow rating | The heaviest trailer the vehicle may pull. | Varies by engine, axle, cab and package. |
| GCWR | Max weight of truck and trailer together, loaded. | Often the hidden limit with heavy trailers. |
| GAWR | Max weight on one axle. | Tongue weight loads the truck’s rear axle. |
The trailer side: UVW + CCC = GVWR
Every towable RV has three related numbers. The UVW (often called dry weight) is the trailer empty from the factory. The GVWR is the most it may weigh with everything loaded. The gap between them is the CCC, the weight of everything you can add: water, propane, food, gear and any dealer-installed options.
For example, the 2027 Forest River Puma 220FK has a published UVW of 6,078 lb and a GVWR of 7,600 lb, so it can carry 1,522 lb of cargo. A full fresh water tank alone (water weighs about 8.3 lb per gallon) can use a few hundred pounds of that.
Which number to compare with your tow rating
Use the trailer’s GVWR, not its dry weight. Dry weight leaves out everything you’ll bring, and a trailer loaded for a trip often weighs close to its GVWR. Many RVers follow the 80% rule: keep the GVWR at or below 80% of the vehicle’s Tow rating to leave a margin for wind, hills and heat. See what your vehicle can tow.
The truck side: payload, tongue weight and GCWR
The trailer’s Hitch weight (tongue weight) or a fifth wheel’s Pin weight rests on the tow vehicle. It counts against the truck’s Payload capacity, along with passengers, cargo and the hitch itself. The 2027 Forest River Puma 220FK lists an unloaded hitch weight of 770 lb; loaded to its GVWR, its tongue weight would be roughly 990 lb (about 13%). Payload is printed on the driver’s door-jamb sticker. Check your payload.
Two more limits apply to the whole rig. The GCWR caps the combined weight of the loaded truck and loaded trailer, and the rear GAWR caps the weight on the truck’s rear axle, which tongue weight pushes down on. Weighing your loaded rig at a CAT scale is the only way to know the real numbers.
Motorhome weights
Motorhomes also have a GVWR, and their cargo figure is the OCCC, which counts the people riding inside as well as gear and water. If you tow a car (a Toad), stay within the motorhome’s tow rating and GCWR.
Common questions
What is the difference between GVWR and UVW?
UVW (unloaded vehicle weight, or dry weight) is what the RV weighs empty from the factory. GVWR is the most it may weigh fully loaded. The difference is the cargo carrying capacity (CCC).
Should I compare my tow rating to an RV’s dry weight or GVWR?
GVWR. Dry weight leaves out water, propane, gear and options, and a trailer loaded for a trip can weigh close to its GVWR. Many RVers keep GVWR at or below 80% of the tow rating.
Does tongue weight count against payload?
Yes. A trailer’s tongue weight (or a fifth wheel’s pin weight) rests on the tow vehicle and counts against its payload, along with passengers, cargo and the hitch itself.
Where do I find my truck’s payload?
On the yellow Tire and Loading Information sticker on the driver’s door jamb: “The combined weight of occupants and cargo should never exceed XXX lbs.”