Truck Payload Capacity Calculator
Knowing how much weight a truck can safely carry is essential for loading it legally and keeping it under control, and this payload capacity calculator works it out from two figures the manufacturer publishes. Enter the gross vehicle weight rating, or GVWR, which is the maximum the fully loaded vehicle is allowed to weigh, and the curb weight, which is the truck empty with fluids but no people or cargo. The tool subtracts the curb weight from the GVWR to give the payload capacity: the combined weight of passengers, cargo, tools, extra fuel and any trailer tongue weight you can add. A frequent and dangerous mistake is to treat payload as cargo alone, forgetting that occupants also count against it, so the calculator helps you see the true cargo limit once people are on board. Staying within this rating, and the separate front and rear axle limits, protects the tyres, brakes, suspension and handling, and keeps you within legal weight limits. Because GVWR and curb weight vary by model, trim and added accessories, both inputs are fully editable so you can enter your exact truck's numbers. The calculation is a single subtraction, shown in the formula below, with a worked example that reconciles exactly to the calculator defaults.
Payload is what is left after the truck's own weight: payload = GVWR - curb weight. A 9,000 lb GVWR truck with a 6,200 lb curb weight can carry 2,800 lb of passengers and cargo combined.
Payload capacity formula
Payload = GVWR - Curb weight
GVWR = maximum loaded weight allowed
Curb weight = empty vehicle with fluids
Payload covers passengers plus cargo plus tongue weight
The GVWR caps the total weight of the loaded truck, and the curb weight is what the empty truck already uses up, so the difference is the weight you are free to add.
Worked example
A truck has a GVWR of 9,000 pounds and a curb weight of 6,200 pounds.
- Payload = GVWR - curb weight
- Payload = 9,000 - 6,200
- Payload = 2,800 pounds
The truck can carry 2,800 pounds of people and cargo combined. These are the calculator's default inputs, so the result above matches the widget exactly.
Truck payload capacity calculator: frequently asked questions
How do I calculate payload capacity?
Subtract the curb weight from the gross vehicle weight rating (GVWR). Curb weight is the truck empty with fluids but no people or cargo, while GVWR is the maximum the manufacturer says the loaded vehicle can weigh. A truck with a 9,000 pound GVWR and a 6,200 pound curb weight has a payload capacity of 2,800 pounds for everything you add.
Does payload include passengers?
Yes. Payload is everything you load into or onto the vehicle beyond its empty curb weight, which means passengers, cargo, tools, fuel beyond the base level, and the tongue weight of a trailer all count against it. A common mistake is to think of payload as cargo only. Subtracting the weight of occupants first gives the cargo you can actually carry.
Where do I find GVWR and curb weight?
GVWR is printed on the certification label, usually inside the driver's door jamb, and is also in the owner's manual. Curb weight is listed in the manual and on the manufacturer's specifications. For the most accurate payload, weigh your specific truck on a certified scale, since options and accessories can raise curb weight above the published figure.
What happens if I exceed payload capacity?
Overloading stresses the tyres, brakes, suspension and frame, lengthens stopping distance and can make the vehicle unstable and unsafe to control. It may also void warranty coverage and breach legal weight limits. Staying within the rated payload, and the separate axle ratings, keeps the truck handling and braking as designed.
What is the payload capacity formula?
Payload capacity equals GVWR minus curb weight. With a 9,000 pound GVWR and a 6,200 pound curb weight, that is 9,000 - 6,200, which equals 2,800 pounds available for passengers and cargo combined.
Official sources
- Vehicle loading and occupational safety guidance: US Centers for Disease Control and Prevention (CDC). As at 25 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.