Free tools
Free freight calculators
Seven calculators for the weights, charges and costs freight people work out every day: air chargeable weight, LTL density and freight class, truck detention, container demurrage, truckload fuel surcharges, a truck's cost per mile and a cross-dock visit's fees. Each one shows its formula, a worked example with real numbers and the rules it follows, so you can check the answer yourself.
Pick a calculator.
Chargeable weight calculator
Actual against volumetric weight for an air shipment, at IATA's 6,000 cm³/kg or 166 in³/lb, line by line.
Freight class calculator
Density in pounds per cubic foot for each pallet, and the class the NMFC's 13-sub density scale gives it.
Detention calculator
What a truck's time at the dock past its free time comes to, on the invoice and on the driver's pay.
Demurrage and per diem calculator
Last free day, charged days and the total for a container at the terminal or out on per diem, with tiered rates.
Fuel surcharge calculator
Surcharge per mile from the diesel price, the base price and miles per gallon, the total for a trip and its share of the linehaul.
Cost per mile calculator
A truck's fixed and per-mile costs over the miles it runs, as a cost per mile, and the margin at a rate per mile.
Cross-dock fee calculator
A cross-dock visit's bill: handling per pallet in and out, the minimum, storage after the free time and extras, per pallet and against what you charge.
Built so you can check the answer.
- The formula, in plain textEvery page writes out the arithmetic it does, term by term.
- A worked exampleReal numbers from a real-looking load, computed by the same code as the calculator.
- Where the rules come fromFactors and tables are named with their source and the date they took effect.
Roadmark does this arithmetic on every load, and shows its work.
Detention from the ELD, chargeable weight per house air waybill, density from the pallets and free time per container.
Let Roadmark work it out on every load.
Bring a week of your own loads. We'll show you the detention, weights, classes and free-time charges Roadmark would have worked out from your ELD times, dimensions and terminal dates.
- Worked from your own loads, not a script
- Every figure shown with where it came from
- Runs beside the TMS you have today