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Haul Gauge

Haul Gauge

Regular price $39.95
Regular price $49.95 Sale price $39.95
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  • Measure tongue weight/pin weight in real-time
  • Plugs into your vehicle's diagnostic port (OBD-II) and wirelessly connects to your smartphone
  • Makes brake controller and weight distribution hitch setup a breeze

Haul Gauge electronic vehicle scale that installs in seconds and wirelessly connects to your smartphone to display real-time tongue weight/pin weight, vehicle and trailer weights, including gross weight, cargo, payload, and weight distribution. This compact, Bluetooth-enabled device plugs into your vehicle's diagnostic port (OBD-II) under the steering wheel, requiring absolutely no wiring, splicing, or installation modifications. Just plug it in, wirelessly connect to your phone and start getting active readouts of your towing and hauling weights. It's perfect for towing a bumper pull trailer, 5th wheel trailer, gooseneck trailer, or accurately measuring the weight of your cargo. Haul Gauge also makes brake controller and weight distribution hitch setup a breeze. Unlike other tongue-weight scale products, Haul Gauge is smartphone-ready. The app is available for download on Apple or Android devices.


Tongue Weigh/Pin Weight:  universally compatible with vehicles with an OBD-II port.

Weight Distribution: universally compatible with vehicles with an OBD-II port.

Cargo/Payload: universally compatible with vehicles with an OBD-II port. Top heavy loads will significantly diminish the accuracy of this feature.

Gross Weight: compatible with 2008 or newer vehicles. Works best with Ford, GM, and Dodge/Ram vehicles. Gross Weight or "Weigh"  is not compatible with Toyota Vehicles.



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We have a cab-over camper, Lance, and tow a large enclosed with our toys and we were concerned we were putting too much stress on the hitch extension, truck, or both. This tool out our minds at ease and helped us figure out tongue weight, overall weight, and bed weight. The only complaint I have is the camper exceeds the max scale for payload and so a reading for payload with the camper doesn't help us out, though it would if the camper was less than 3500 lbs. We will be buying one of these for each family member who tows trailers, its so dang handy..

What's included with Haul Gauge?


When bumper towing a trailer, having the correct tongue weight is paramount for highway speed stability. Haul Gauge is less expensive and more effective than most other tongue weight scales. It is also much more convenient to use. The tongue weight feature allows you to verify that your trailer tongue weight is within the 10-15% range that most trailers require to remain stable, and that it is within the vehicle's and the hitch’s rated towing capacities.

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Just as Haul Gauge functions as a tongue weight scale for bumper tow trailers, it also works as a pin weight scale for gooseneck and fifth wheel trailers. Its Pin Weight feature allows you to ensure that the vertical load is within the hitch and vehicle’s rated capacities.

You can also compare the pin weight with the total trailer weight to ensure the trailer is properly loaded (pin weight should be 20-25% of gross trailer weight).

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As you're loading up the vehicle with cargo, equipment, or materials, you can avoid exceeding the payload limits.

The Haul Gauge is much easier to use and more convenient than other vehicle scales. It is helpful for estimating your load and keeping you within the appropriate limits of your vehicle.

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The Weigh feature measures gross combined weight (GCW). This includes the vehicle, cargo, passengers and trailer. The Haul Gauge vehicle and trailer weight scale displays the weight within seconds of driving.

Weighing your towing setup provides peace of mind by removing the guesswork. Based on manufacturer’s vehicle towing recommendations, you can easily decide if your vehicle is overloaded. Using the trailer weight calculator, you can know the total weight of the trailer and decide if it is safe to tow.

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Setting up your weight distribution hitch has never been easier. Put away the tape measure, pen, paper and stress – Haul Gauge displays the relative weight on your front, rear and trailer axles to ensure that your weight distribution hitch is set up and adjusted correctly. It is compatible with all weight distribution systems.

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  • Wow this thing actually works!

    So far I've tested it with the Vehicle weight and a Toy Hauler Trailer combo. I also tested the hitch weight feature. I'm really surprised that worked out of the box with no user calibration.

    Amazon Review 
  • This is a great unit, and a handy tool to have in you truck when loading or towing.

    Using the app, you center your ball under the tongue and let the app "zero" your truck, with the engine off. After it is zeroed, then start lowering the tongue. Once it makes contact, you can actually watch the scale on the app start to increase until all the weight is on the ball.

    Amazon Review 
  • Amazingly accurate and easy

    I was a little skeptical of using a small "plastic" device that connects to my OBD port and uses an iPhone App to weigh my truck and trailer and set my weight distribution hitch, boy was I wrong...

    Amazon Review 
  • Happy camper

    I like this product because I don't have to tediously go to a commercial weigh station. It also allows me to distribute weight in my toy hauler (TH) in real time so I properly load my camp items. My experiences convince me that this product is accurate enough however, within 1 or 2 hundred pounds. Good enough for my camping and hauling needs.

    Amazon Review 
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  • Functionality on manual transmission vehicles is limited to the payload, tongue weight, pin weight, and weight distribution.
  • The product may require manual calibration for the newest vehicle models. Vehicles with auto-leveling suspension will have limited functionality.
  • Not intended for weight certification.
  • Users must follow all manufacturer's instructions and guidelines. This includes but is not limited to the vehicle, the trailer, the trailer brake controller, and any and all trailering accessories, (I.E. hitches, weight-distributing hitches, etc.)   Haul Gauge is an aid to assist the user in evaluating the tongue weight, pin weight, weight distribution hitch setup, trailer brake gain setup, payload, and gross weight of a vehicle and or a vehicle, including an attached trailer. It is not intended to replace any manufacturer's instructions for these procedures and should not be relied upon to keep within the limits of your vehicle's manufacture specifications..