Towing Weight Payload and Hitch weight Gauge

All on one Smartphone APP

In Stock
Haulgauge needs calibration testing on Australian vehicles as these are not in the USA database. If you would like to be a field tester, Please go to our page:

Know What You Tow


HaulGauge measures vehicle-caravan "gross combined weight", hitch weight, vehicle payload. It does this all  in real-time with an OBD-II connector. This is a small wireless device that plugs into your vehicles ODB-II outlet. It communicates wirelessly via Bluetooth with an app on your iPhone or Android device.


HaulGauge is an Artificial Intelligence (AI) device that gets most of it's information from the vehicle's computer system. What isnt in the vehicle's computer system is captured in the ODB-II device on-board electronics. The Artificial Intelligence (AI) software calculates weight by monitoring powertrain effort and vehicle acceleration.  The Artificial Intelligence (AI) software uses a complex torque converter model to devise the Powertrain effort. For this reason, vehicle with manual transmission that dont have a torque convert won't have full functionality. In the USA HaulGauge uses the VIN to search its database for the correct torque converter calibration.   In Australia, we have developed a simple procedure for the user to calibrate the scale utilizing a patented Machine Learning algorithm.  Acceleration is determined utilizing a triaxial accelerometer on board HaulGauge.   For the super-technical minded: when powertrain effort is high relative to vehicle acceleration, then weight has increased.



  • Measures Gross Combined Weight (GCW includes vehicle, cargo, passengers, and trailer)
  • Peace of Mind. No more guessing. Easily decide if overloaded.
  • Convenient. No longer need to drive to a weigh bridge.
  • Saves money and time. HaulGauge will display the weight within seconds of driving.
  • Safety. Knowing the maximum total weight of the trailer for a safe set up.





  • Keep hitch drawbar weight within the vehicle’s rated capacity. (called tongue weight in USA)
  • Compare drawbar weight to caravan weight to verify caravan is properly loaded.  Drawbar Weight should be around 10-15% of Gross Trailer Weight (weight of trailer and cargo).
  • Save money on expensive drawbar weight gauges
  • Convenient. No more hastle of using a bathroom scale to figure drawbar weight.
  • Safety. Proper drawbar weight is key to safe towing and trailer sway avoidance. Use HaulGauge to get it right and tow safe.
  • Peace of Mind. No more guessing. Easily decide if overloaded.



What kind of device is necessary?

  • Any iOS device with 10.3 or higher
  • Any Android device with 5.0 Lollipop and higher and is bluetooth enabled

What vehicles will it work with?

  • Any vehicle that is 1996 or newer
  • Must be an automatic transmission
  • Many vehicles 2008 and newer will have preset calibration.  Most older cars will require a self-calibration.
SKU TOW120010100
Brand Haulgauge
Shipping Width 0.080m
Shipping Height 0.001m
Shipping Length 0.200m
Shipping Cubic 0.000016000m3
Unit Of Measure each

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