Truck Load Capacity Calculator — GVW vs 80,000 lb Federal Limit
Verify your gross vehicle weight before dispatch. Enter truck tare weight and cargo weight to check against the federal 80,000 lb limit and avoid overweight fines.
🚛 Truck Load Capacity Calculator
How to Use This Calculator
- Find your tare weight — from your truck registration or CAB card. Typical Class 8 semi: 30,000–35,000 lbs.
- Enter cargo weight — from the shipper's bill of lading. Include pallets and all packaging materials.
- Add fuel weight — diesel weighs approximately 7 lbs per gallon. A full 150-gallon tank adds ~1,050 lbs.
- Check the result — if over 80,000 lbs, you need to reduce cargo, offload fuel, or obtain an overweight permit before dispatch.
Worked Example
A driver with a tare weight of 33,500 lbs picks up a 44,000 lb load with 1,200 lbs of fuel and 250 lbs driver/gear.
- GVW: 33,500 + 44,000 + 1,200 + 250 = 78,950 lbs
- Remaining: 80,000 − 78,950 = 1,050 lbs available
- Status: LEGAL — 98.7% of federal limit
The truck is legal but close to the limit. The driver should note that adding any freight or fuel will push them over. Some states have lower limits — check individual state regulations for your route.
Frequently Asked Questions
The federal gross vehicle weight limit on Interstate highways is 80,000 lbs. Axle limits are also enforced: 12,000 lbs on the steer axle, 34,000 lbs on tandem drive axles, and 34,000 lbs on tandem trailer axles. Some states allow higher gross weights on non-Interstate roads.
Overweight fines vary by state but typically start at $100–$500 for minor overages and scale up rapidly. Some states charge per pound over the limit. The driver and carrier are both liable. Repeat violations can lead to out-of-service orders.
Yes. Most states issue oversize/overweight (OS/OW) permits for loads that exceed standard limits — common for construction equipment, transformers, and other non-divisible loads. Permits specify approved routes and may require escorts.
The 80,000 lb GVW limit applies on federally funded Interstate highways. Some states allow higher weights on their own roads — Michigan, for example, allows up to 164,000 lbs on certain roads with proper permits.