TowCal™

A simple iPhone® app to help perform towing weight calculations

Coming Soon!

Public Beta Testing now Open - Click here for more info!

Select options for which scale tickets you have

Enter weights from your scale tickets. Information screens help show where to find the information

Enter specs for your trailer - Information screens help show where to find the information

Enter specs for your tow vehicle. Information screens help show where to find the information

TowCal visually shows how values relate to each other and if any values are out of limits in light or dark mode

Highlight of Features:

  • Here’s what the app calculates from your inputs — no math required on your end:

    Tow Vehicle

    • Combined weight (truck + trailer)

    • Truck weight

    • Front axle load

    • Rear axle load

    • GVWR compliance

    • GCWR compliance

    • Axle rating limits

    • Tire load limits

    Hitch + Trailer

    • Hitch (tongue or pin) weight

    • Hitch load % (balance check)

    • Hitch vertical & tow rating compliance

    • Trailer GVW (total weight)

    • Trailer GVWR check

    • Trailer axle limits

    • Trailer tire load checks

    Color-coded results + a visual diagram make it easy to spot where you’re safe — and where you’re overloaded.

  • Request new features on the contact page - your feedback matters.