How to use this calculator
- Enter trailer dimensions. Use actual inside length, width and height for the trailer or container being loaded.
- Enter usable payload. Use the payload cap left after tractor, trailer, route and equipment constraints.
- Enter pallet dimensions. Use the loaded pallet footprint and height, including product, pallet, wrap and overhang.
- Set stack levels. Use one level when freight is not stackable, or the maximum safe stack count when it is.
- Review the limiting factor. Compare floor positions, payload-limited pallets, cube utilization and payload margin.
How it works
The calculator first counts floor positions for a rectangular pallet pattern: N_floor = floor(L_t / L_p,along) x floor(W_t / W_p,across) It then applies stack height: N_space = N_floor x min(n_stack,max, floor(H_t / H_p))
Payload capacity is checked separately: N_weight = floor(W_payload,max / W_pallet) The loaded pallet capacity is: N_load = min(N_space, N_weight) Use the result with freight density, truck axle load, truck payload and fleet fuel cost screens.
Worked example
Verified against the live calculator
A 53 ft trailer with 100 in inside width and
110 in inside height, loaded with 48 x 40 x 52 in
pallets at 1,200 lb each, fits 30 floor positions
in the best simple crosswise pattern. With one stack level and a
45,000 lb payload cap, space controls at
30 loaded pallets and 36,000 lb of pallet weight.
Frequently asked questions
How do you calculate truckload pallet capacity?
Divide usable trailer length and width by the loaded pallet footprint in a chosen orientation, multiply the floor positions by allowed stack levels, then compare that space capacity with the payload-weight capacity.
Does this solve pinwheel pallet patterns?
No. It compares all pallets lengthwise, all pallets crosswise, or the better of those two simple patterns. Pinwheel, mixed-size, staggered or partial-row loading needs a dedicated load plan.
Why can payload limit reduce pallet count?
A trailer may have floor space left while gross payload is already used up. This calculator returns both space-limited pallets and payload-limited pallets so the controlling limit is visible.
Is this a legal truck weight calculator?
No. It is a planning screen for pallet count and cube. Real dispatch decisions need equipment specs, scale weights, axle ratings, bridge-law checks, securement and route limits.
Method & assumptions
- The packing model is a simple rectangular all-lengthwise or all-crosswise pattern.
- Pallets are assumed identical, with no allowance for mixed freight, load bars, dunnage lanes, pinwheel patterns, damage spacing or door obstructions beyond the entered inside dimensions.
- Payload limit is a user-entered planning cap, not a legal axle, bridge-law or permit calculation.
- Final loading still needs actual equipment specs, certified scale weights, axle limits, securement, stability and carrier rules.