Scale math, done before the reweigh.
Free calculators built for drivers — slide your tandems right the first time, know your real cost per mile, and check a load before you book it. No app to download, no signup, loads on truck-stop wifi.
Slide My Tandems → Punch in your scale ticket. Get holes and direction, not just “forward or back.”The toolbox
Tandem Slide CalculatorSTART HERE
Overweight on your drives or trailer tandems? Get the number of holes to slide and which direction — before you pay for a reweigh.
→Cost Per Mile Calculator
Your all-in operating cost per mile — fixed costs, fuel, maintenance. The number every rate negotiation starts from.
→Rate Per Mile Calculator
All-in rate including deadhead, minus dispatch and factoring fees. Know if a load is worth it before you call the broker back.
→Fuel Cost Calculator
Trip fuel cost from miles, MPG, and pump price — plus what a half-MPG improvement is actually worth per month.
→Per Diem Tax Calculator
Days on the road × the IRS trucker per diem rate. See your deduction and the rough tax savings you're leaving behind if you don't claim it.
→Truck Payment Calculator
Monthly payment, total interest, and the real all-in cost of that truck before you sign at the dealer.
Built by drivers' math, not an app store
AxleMath is a set of free web tools for the numbers drivers actually run every week: sliding tandems at the scale, pricing a load, tracking cost per mile, and squaring up with the IRS at tax time. Every tool works in the browser — nothing to install, no account, no upsell screen between you and the answer. Results print out like the scale ticket in your hand, because that's the format the answer needs to match.
Start with the tandem slide calculator if you're sitting at a CAT scale right now. If you're running your own authority, the cost per mile and rate per mile tools work together: figure your break-even once, then check every load against it.