Calculators
Pick the tool you need. Each calculator opens on its own page.
Smart Tandem / Scale Assistant
Estimate a trailer-tandem slide, then use a reweigh ticket to calibrate the next move for this load.
Open calculatorCan I Make It? HOS Trip Calculator
Compare a trip estimate with your remaining drive, 14-hour, and 60/70-hour cycle time.
Open calculatorCompany Driver Paycheck Calculator
Estimate company-driver gross pay from paid miles, accessorial work, hourly pay, and schedule assumptions.
Open calculatorFuel & Trip Cost Calculator
Estimate road fuel, idle fuel, tolls, and other entered trip expenses.
Open calculatorDriver guides
Short explanations for the decisions behind the numbers.
Which Way Do I Slide My Tandems?
A direct way to choose the direction of a trailer-tandem move from the heavy axle group.
Read guideHow Many Pounds Move Per Tandem Hole?
Why pounds per hole varies and how two scale tickets give a better number for the current load.
Read guideHow to Read a CAT Scale Ticket
Use steer, drive, trailer, and gross readings to decide what kind of weight problem you have.
Read guideHow to Fix an Overweight Drive or Trailer Axle
A decision process for determining whether a tandem slide can actually correct the ticket.
Read guideHow to Tell Whether You Have Enough HOS to Finish a Trip
Estimate the trip, compare it with every remaining clock, and identify the tightest margin.
Read guideHow the 11-Hour, 14-Hour and 60/70-Hour HOS Limits Work Together
Understand why each HOS limit can independently stop a property-carrying driver from driving.
Read guideCDLMath started with calculations Kev needed while running regional. The tools are free, mobile-first, and meant to support the ELD, scale ticket, current rules, and a driver's judgment.