ODPermitFree calculator

Read the estimate.
Know what comes next.

An oversize permit estimate starts with the complete loaded vehicle and the states on the proposed move. Here is how ODPermit turns those inputs into a useful number.

Measure the truck, trailer, and load together.

A cargo sheet may describe the machine sitting on the ground. A permit calculation needs the combination moving down the road. Review which basis your document uses before calculating.

Loaded height
Road surface to the highest point of the loaded combination. Cargo height plus the loaded deck height is a starting estimate; the tractor or another part of the load may be higher.
Loaded width
The widest point of the complete load and vehicle, including projecting cargo and transport packaging.
Overall length
The full combination from its foremost to rearmost point, including load projections. Cargo length and trailer length alone do not give this number.
Gross weight
The tractor, trailer, fuel, equipment, and cargo together. Gross weight alone does not establish legal axle weights or bridge compliance.

Federal weight guidance also considers axle groups and spacing. See the FHWA size, weight, and permit reference for that distinction.

The same cargo can produce a different loaded height.

For a 12-foot-tall piece, these editable ODPermit equipment assumptions produce the following starting heights. They illustrate the arithmetic; they do not certify that the trailer can carry the load.

Illustrative 12-foot cargo: deck height + cargo height
Planning equipmentDeck heightCargo + deck
48 ft flatbed · 5 axles60 in17′ 0″
48 ft step deck · 5 axles40 in15′ 4″
RGN · 26 ft well · 6 axles18 in13′ 6″

ODPermit also checks the proposed tractor height when producing its loaded-height estimate. Confirm payload capacity, deck length, axle loading, overhangs, and your actual equipment measurements. The calculator lets you change the assumptions or enter the loaded measurements directly.

Equipment references and assumption basis

48 ft flatbed · 5 axles

48 ft platform; the illustrated 40 in drop deck and 20 in drop support a 60 in upper-deck planning height. Combined tare and tractor geometry are editable ODPermit assumptions. Great Dane Freedom trailer specifications

48 ft step deck · 5 axles

40 in loaded lower deck, 47 ft 10 in overall trailer, 10 ft upper deck; base trailer weight 9,995 lb. Combined tare assumes approximately 22,000 lb for tractor, fuel and equipment. Trail King TK80ACS-40 specifications

RGN · 26 ft well · 6 axles

18 in loaded deck, 26 ft well, standard tridem trailer, estimated base weight 24,020 lb ±3%. Planning tare adds 22,000 lb for tractor, fuel and equipment. Trailer and combination lengths are editable estimates; no payload approval is implied. Fontaine Magnitude 55L Plus specifications

Try the tall-load sample

The subtotal is estimated agency fees.

State permit schedules differ. A fee may be flat, based on distance, or calculated from weight above a stated legal or registered limit. Some loads require an agency assessment before the amount is known.

ODPermit shows the priced states and the basis for each amount. An unpriced state is excluded from the subtotal and remains visible as a separate item; it is never silently treated as a free permit.

$400estimated agency fees

Texas and Oklahoma, for the wide-equipment sample and its recorded assumptions. No ODPermit service fee or markup. Pilot-car costs are separate.

Open the sample and run a current estimate →

The TxDMV general single-trip schedule is one example of an agency’s published permit charges. Read the state references attached to your own result, since your route and load may select a different fee.

An escort finding is a planning requirement, not a booking.

Review potential pilot-car count and placement together with the stated conditions. Road type, dimensions, and permit directions can change the plan. A height pole, police escort, utility coordination, or route survey may also need attention.

The pricing itinerary identifies states and mileage for an estimate. It does not verify every bridge, overhead line, work zone, or turn. Final routing and movement conditions come from the authorities and the issued permit.

Find the states on your route

Keep the load with the request.

Choose “Get a reviewed estimate” or permit assistance after you see the result. Your shipment, equipment assumptions, route, and calculation are attached so you can focus on timing and the help you need.

A request receipt confirms the information was saved. It does not confirm permit issuance or an escort reservation.

Start with your load
Loaded-vehicle measurement guide
Front view of a modeled tractor, lowboy and transformer with width annotation derived from this camera’s projection
Overall width · Include the load’s widest projections.Illustration — not to scale
Measure the loaded combination.

Select a dimension. Switch the camera view.

Start at the widest point.

Measure the complete loaded vehicle, including cargo that extends beyond the trailer.

Check your loaded vehicle