CheckMyTow

CAT Scale Ticket Calculator — turn your weigh ticket into verdicts

A weigh ticket is the only place your real axle weights exist — every calculator on this site estimates, a scale measures. Enter the ticket lines and your sticker ratings; this tool turns them into the five checks that matter, with no percentage guesses in between.

Pass A — hitched, loaded to tow (WDH bars on, as towed)

The three axle lines printed on the ticket.

Add the bars-off and truck-alone passes → tongue weight, trailer weight, FALR

Pass B — same load, same people, spring bars released. No WDH? Then pass A is your bars-off pass — enter the same three numbers here.

Pass C — truck alone, trailer dropped in the lot (never on the platforms), same people and gear.

Your ratings — from the door stickers

Front/rear GAWR and GVWR are on the driver's door-jamb certification label. GCWR is in your owner's manual or towing guide. Trailer GVWR is on the trailer's own VIN label.

Where are these numbers? The white certification label on the door jamb
Example of the white door-jamb certification label The label lists GVWR 3175 kg (7000 lb), GAWR FRONT 1746 kg (3850 lb) and GAWR REAR 1950 kg (4300 lb) with tire and rim sizes. The GAWR REAR row is highlighted — that is the rear GAWR number the calculator asks for. MFD. BY EXAMPLE MOTOR CO.   DATE: 03/25 GVWR: 3175 KG (7000 LB) GAWR FRONT: 1746 KG (3850 LB) WITH 275/65R18 TIRES, 18X7.5J RIMS AT 240 KPA (35 PSI) COLD GAWR REAR: 1950 KG (4300 LB) WITH 275/65R18 TIRES, 18X7.5J RIMS AT 280 KPA (41 PSI) COLD REAR GAWR — ENTER THIS NUMBER THIS VEHICLE CONFORMS TO ALL APPLICABLE U.S. FEDERAL MOTOR VEHICLE SAFETY STANDARDS IN EFFECT ON THE DATE OF MANUFACTURE SHOWN ABOVE. VIN: 1EXAMPLE000000000   TYPE: TRUCK
Numbers are an example — read yours off the driver's door jamb.

Enter the three pass-A lines (steer, drive, trailer axle) to begin.

The three-pass workup, compressed

  1. Pass A — whole rig, hitched, bars on: steer, drive, and trailer axles each on their own platform.
  2. Pass B — pull around, release the spring bars, re-weigh (skip if you tow without a WDH — pass A already is this pass).
  3. Pass C — drop the trailer in the lot, weigh the truck alone.

The details that make the numbers honest:

  • Load ready-to-camp: water and propane at travel levels, gear packed, family in the truck.
  • Same people in the same seats on every pass — a passenger who waits outside on one pass corrupts the deltas.
  • Never unhitch on the platforms — drop the trailer in the parking lot, keep the tongue jack off the scale.
  • Adjusted the WDH afterwards? The old ticket is void — re-weigh.

Cost: first weigh $15.25, re-weighs within 24 hours $5.25 each (max two) — about $25.75 for the full three-pass workup at any CAT scale (2,300+ locations at US truck stops; the Weigh My Truck app pays from the cab at no markup). One caveat: axle totals can hide one overloaded side or tire — wheel-position weighing (RVSEF / Escapees SmartWeigh) is the only way to see side-to-side balance.

First time at a truck-stop scale? The full walkthrough with a worked example lives in how to weigh your trailer.

Got your measured tongue weight and trailer weight? Feed them into the towing calculator — measured beats estimated in every check we run.

Look up config-level tow ratings:

Scale tickets are measurements, but ratings interpretation is still on you — verify against your door-jamb sticker and owner's manual. See the disclaimer.