RapidShips Freight Tools

Free Freight & Logistics Tools

Practical calculators for shippers, importers, carriers, warehouse teams, freight brokers and logistics professionals.

  • 6 free calculators
  • No sign-up
  • Instant results
  • Nothing you enter is stored

Calculators

All Freight Tools

Filter by category or search above. Every tool gives an instant answer and shows how it got there.

  • Flagship tool

    Container Loading Calculator

    Check cargo volume, weight, volume utilization and remaining space in a 20-ft, 40-ft or 40-ft high cube container, for pallets or cartons.

  • Freight

    Freight Class & Density Calculator

    Get cubic feet, total weight and density per handling unit, with the matching class on the 2025 NMFC density scale.

  • Pallets

    Pallet Calculator

    Footprint, cubic feet, CBM and total weight for 48 x 40, 42 x 42, 48 x 48 or custom pallets, plus an equipment estimate.

  • Weights & Dimensions

    CBM Calculator

    Cubic meters and cubic feet for cartons in cm, m, inches or feet, with every step shown in plain language.

  • Weights & Dimensions

    Dimensional Weight Calculator

    Dimensional and chargeable weight with the divisor your carrier uses: 139, 166, 5,000, 6,000 or your own.

  • Weights & Dimensions

    Freight Unit Converter

    Two-way conversion for kg and lb, cm and inches, meters and feet, CBM and cubic feet.

  • Suggest a tool

    Need a calculator we don’t have?

    Tell the RapidShips team which freight math slows you down. New tools are added here as they are built and tested.

Featured tools

Start With the Two Questions We Hear Most

Will it fit, and what will it class at? These two calculators answer the first version of both.

  • Will it fit?

    Container Loading Calculator

    Volume and payload used, space left, and a simple grid estimate for pallets or cartons in a 20-ft, 40-ft or 40-ft high cube. Container specs are editable.

  • What class?

    Freight Class & Density Calculator

    Density per handling unit and the matching tier on the 13-tier NMFC density scale that took effect July 19, 2025.

  • What will it bill at?

    Dimensional Weight Calculator

    Actual, dimensional and chargeable weight side by side, with the divisor your carrier actually uses.

Need help with this shipment?

Need Human Help?

Calculators give you the first answer. When the freight itself needs work, the RapidShips dock in East Brunswick, NJ does it with our own crew, forklifts and 3 dock doors, 24/7 by appointment.

Request Service Call RapidShips 800-376-2808

Which Freight Calculator Should You Use?

Most freight questions come down to three numbers: how much space the freight takes, how much it weighs, and how those two compare. Pick the tool by the question you need answered.

Which calculator answers which question
Your questionUse this toolWhat you get
Will my pallets or cartons fit in a 20-ft or 40-ft container?Container Loading CalculatorVolume and payload used, space left, simple grid estimate
What freight class does my density point to?Freight Class & Density CalculatorPounds per cubic foot and the matching NMFC density tier
How much floor space and cube do my pallets take?Pallet CalculatorFootprint, cubic feet, CBM, weight, equipment estimate
How many cubic meters is my shipment?CBM CalculatorCBM and cubic feet, with each step written out
Will a parcel or air shipment bill on size or on weight?Dimensional Weight CalculatorActual, dimensional and chargeable weight
What is 850 kg in pounds, or 2.4 CBM in cubic feet?Freight Unit ConverterTwo-way conversions with exact factors

Freight Math in Plain Language

Volume is length x width x height. Ocean freight usually counts it in cubic meters (CBM) and U.S. trucking in cubic feet; 1 CBM is about 35.31 cubic feet. Density is weight divided by volume, in pounds per cubic foot for U.S. LTL freight, and it is the starting point for many freight classes. Dimensional weight is volume divided by a carrier’s divisor, so a large, light box can bill as if it were heavier.

None of these numbers proves a load will work on its own. Real loading depends on orientation, stacking strength, weight distribution and road limits. Our guides cover the details: container vs. trailer capacity, floor-loaded vs. palletized containers, container weight rules and cargo securement for palletized freight.

Frequently Asked Questions

Are the RapidShips freight calculators free?
Yes. Every calculator on this page is free to use with no sign-up. The math runs in your browser, so results appear as you type.
Do you store the shipment details I enter?
No. Dimensions, weights and quantities stay in your browser and are not saved or sent to RapidShips. Our analytics only record that a calculator was used, by tool name, never the values you typed.
How accurate are the results?
The arithmetic and unit conversions are exact and tested. The answers are only as good as the measurements you enter, and equipment sizes are typical published values that vary by manufacturer. Treat results as planning estimates, not as a load plan, a freight class or a carrier quote.
Can I put the freight class from the calculator on my bill of lading?
Not on its own. The freight class calculator shows where your density falls on the NMFC density scale, which is a useful reference. Many commodities have their own NMFC item and class, so confirm the item and class with your carrier or NMFTA before you ship.
What if my freight needs physical work, not just math?
RapidShips runs an asset-backed dock at 25A Cotters Lane in East Brunswick, NJ, open 24/7 by appointment. We handle transloading, cross-docking, freight rework and short-term storage. Call 800-376-2808 or send the load details.

Last reviewed: 2026-09-30