All TowAtlas tools in one place.
This is the complete calculator index for RV, trailer and commercial-truck tasks. New to towing? Start with the beginner RV towing guide. For a full truck-and-trailer towing check, use Rig Check.
Start with your truck
Towing, weight & trip tools
Towing Calculator
Start with the whole towing picture and choose the right calculator for payload, trailer weight, GCWR, hitch or scale checks.
Payload Calculator
Payload remaining after people, cargo, hitch and tongue weight.
Loaded Trailer Weight
Estimate loaded weight from dry weight, water and cargo.
Fifth-Wheel Pin Weight
Estimate pin weight and truck payload remaining.
3-Weigh CAT Scale
Actual trailer/tongue weight and WDH restoration.
Weight Distribution Hitch
Compare front axle loading across three conditions.
Combined Weight / GCWR
Compare estimated combined loaded weight with entered GCWR.
Water & Cargo Weight
Convert water to weight and total common cargo.
Tire Size Comparison
Compare tire diameter and estimated speedometer effect.
Trailer Tire Load
Estimate load per tire against an entered tire rating.
RV Battery Runtime
Estimate usable watt-hours and runtime.
Generator Sizing
Estimate wattage from running and surge loads.
Towing Fuel Cost
Estimate gallons, cost and cost per mile.
Scale, axle & load tools
CAT Scale Weight Analyzer
Check axle weights and get suggestions for tandems, fifth wheel, cargo position and gross-weight issues.
Tandem Slide Estimator
Estimate tandem holes and direction.
Diesel Fuel Weight
Estimate fuel weight from gallons and pounds per gallon.
Gross Weight Calculator
Add steer, drives and trailer axle groups.
Payload Remaining
Estimate remaining gross capacity after added load.
Fifth-Wheel Slide
Estimate steer-weight transfer using your own rate.
Federal Bridge Formula
Run bridge-formula arithmetic from axle count and spacing.
Multi-Ticket Scale Compare
Compare axle changes between two scale tickets.