GVWR Calculator

GVWR is the maximum safe operating weight of a vehicle as specified by the manufacturer. It includes the vehicle's own weight (tare/curb weight) plus the maximum allowable payload — passengers, cargo, and any tongue weight from a trailer. Exceeding GVWR is illegal and dangerous.

GVWR = Tare Weight + Rated Payload. The tare weight is the empty vehicle weight, and the rated payload is the maximum weight the manufacturer allows you to add. For example, a truck with a 5,000 lb curb weight and a 2,000 lb rated payload has a GVWR of 7,000 lbs.

No. GVWR is always a positive value since it represents the maximum total weight a vehicle can safely carry. If your calculated payload appears negative, it means the vehicle is already overloaded before any cargo or passengers are added.

GVWR (Gross Vehicle Weight Rating) applies to a single vehicle and is the maximum loaded weight that vehicle can handle. GCVWR (Gross Combined Vehicle Weight Rating) applies to a truck-and-trailer combination and is the maximum allowable weight for both the towing vehicle and the trailer together.

Start with the truck's GCVWR and subtract its current loaded GVW (curb weight + passengers + cargo). The result is your available towing capacity. You also need to ensure the trailer's GVWR does not exceed the truck's rated towing capacity, and that the hitch weight stays within the truck's available payload.

Tongue weight (TW) is the downward force the trailer's coupler exerts on the truck's hitch ball. It typically should be 10–15% of the total trailer weight. Too little tongue weight causes trailer sway; too much reduces front axle traction and can overload the truck's rear axle. It also counts against your truck's payload capacity.

GAWR (Gross Axle Weight Rating) is the maximum weight each individual axle on a vehicle is rated to carry. GVWR is the total maximum loaded weight for the whole vehicle. Even if your total load is within GVWR, improper weight distribution could exceed an axle's GAWR — so always check both ratings and weigh your vehicle at a scale.

UVW stands for Unloaded Vehicle Weight — it's the dry weight of an RV or trailer as it leaves the factory, without any passengers, cargo, water, or fuel. The difference between UVW and the trailer's GVWR gives you the maximum cargo carrying capacity (CCC) you can add before reaching the trailer's safe weight limit.