Overlanding Payload Calculator
Check whether your overland build stays under the vehicle payload rating once passengers, tent, water, fuel, gear and mods are loaded.
How it works
water lb = gallons × 8.34 · fuel lb = gallons × 6.3 · used = passengers + tent + water + fuel + gear + mods · remaining = payload − used
Payload is the weight your vehicle can carry above its own curb weight — occupants and everything you add — and it is printed on the driver door-jamb sticker (“the combined weight of occupants and cargo should never exceed X lbs”). Overlanders blow through it fast because the big-ticket items stack up: a rooftop tent, jerry cans of water at 8.34 lb per gallon and fuel at about 6.3 lb per gallon, recovery gear, and steel bumpers or a winch that are bolted on permanently. Adding it all and subtracting from the rating shows whether you have margin or are overloaded — a real safety and legal issue, not just a comfort one.
Worked example
Against a 1,500 lb payload: 340 lb of passengers + 130 lb tent + 10 gal water (83 lb) + 10 gal fuel (63 lb) + 250 lb gear + 200 lb of mods = about 1,066 lb used. That leaves 434 lb remaining, roughly 71% of the rating used — within the limit with headroom for a full tank and a few trail finds.
Frequently asked questions
Where do I find my payload rating?
On the yellow-and-white sticker inside the driver’s door jamb, worded as the combined weight of occupants and cargo. Do not use a generic online figure — payload varies by trim, drivetrain and factory options, and the door sticker reflects your exact vehicle. Aftermarket heavy bumpers already eat into it before you pack a thing.
Does modifying the suspension increase payload?
No. Heavier springs, airbags or bigger tires can level a sagging rig and help it carry weight more comfortably, but the payload rating is set by the weakest link — often the axles, wheels, brakes or frame — and is a legal figure that suspension mods do not change. Overloading remains overloading even if the truck sits level.
Why does going over payload matter?
Exceeding payload lengthens braking distances, stresses tires and axles toward failure, hurts handling on- and off-road, and can void insurance or warranty claims after an incident. Water and fuel are the easy levers — carry only what the leg between resupply points actually needs rather than running full tanks everywhere.
Related calculators
Estimate for planning. Always confirm against your vehicle’s door-jamb payload sticker and GVWR.