Free freight & shipping calculators.
Sea, air and road - CBM and container loads, chargeable weight, pallets and LTL freight class, duty and landed cost. All the maths that sits between a supplier quote and a real number. Every tool shows its working, runs entirely in your browser, and gives you a link you can send to your forwarder.
Which calculator do you need?
| Calculator | Use it when |
|---|---|
| CBM calculator | You need the sea freight volume of a shipment |
| Volumetric weight calculator | You are shipping by courier or express and want to know the billable weight |
| Shipping cost per unit calculator | You need per-unit freight cost for pricing or margin work |
| Landed cost calculator | You need the true delivered cost of an import, including duty and tax |
| LCL vs FCL calculator | You are deciding between loose cargo and a full container for a sea shipment |
| Demurrage and detention calculator | A container is running past its free days and you need the number |
| VGM calculator | You need to declare a verified gross mass before a container is loaded |
| Cost per mile calculator | You need the true running cost of a vehicle, per mile or per kilometre |
| Container load calculator | You need to know how many containers a shipment fills and which limit binds |
| Pallet calculator | You need cartons per pallet, or how many pallets a shipment builds |
| Chargeable weight calculator | You are quoting or booking air freight and need the weight the airline will invoice |
| Freight class calculator | You are booking LTL and need the density and class for the bill of lading |
Scroll the table sideways to read the full row.
All Calculators
12 live- 01CBM calculatorA free online CBM calculator for shipping - enter carton dimensions in cm or inches, across as many different sizes as your packing list actually has.
- 02Volumetric weight calculatorA free volumetric weight calculator online - enter your parcel dimensions and your carrier's divisor, and see whether you are billed on what it weighs or on the space it takes up.
- 03Shipping cost per unit calculatorA free cost per unit calculator for importers - turn one freight invoice into the per-unit number you actually price and budget against.
- 04Landed cost calculatorA free landed cost calculator for importers - add freight, insurance, duty and import tax to your product cost and see what a unit really lands at.
- 05LCL vs FCL calculatorWork out whether this shipment is cheaper as LCL or FCL on your own quoted rates - and the exact volume where the answer flips.
- 06Demurrage and detention calculatorWork out what the clock has already cost you - demurrage and detention, on tiered rates, across every container in the shipment.
- 07VGM calculatorWork out the verified gross mass SOLAS requires before your container can be loaded - item by item, with the arithmetic shown.
- 08Cost per mile calculatorWork out what a vehicle really costs to run per mile - fuel beside the total, so you can see how much of it is not fuel.
- 09Container load calculatorHow many containers your cartons actually fill - and whether it is space or weight that runs out first.
- 10Pallet calculatorHow many cartons fit on a pallet, how many pallets your shipment needs, and whether height or weight runs out first.
- 11Chargeable weight calculatorA free chargeable weight calculator online for air freight - enter every carton size on the packing list and see the weight the airline will actually invoice, with the arithmetic shown.
- 12Freight class calculatorA free freight class calculator online - enter each pallet as the carrier handles it and see its density, its class on both published scales, and where those two scales disagree.
12 calculators, each one showing its working, with its sources and the date they were last checked printed at the foot of the page.
About this site
What is a freight calculator?
A freight calculator turns shipment measurements into the figure a carrier or a customs authority will actually bill you on - cubic metres for sea freight, volumetric weight for air and courier, duty and import tax for a customs entry. The arithmetic in each one is simple. The value is in applying the right formula, in the right unit, on the right basis for the shipment in front of you.
Which calculator do I need?
Use the CBM calculator for the sea freight volume of a shipment, the volumetric weight calculator when a courier or airline will bill you on space rather than scale weight, the shipping cost per unit calculator to turn a freight invoice into a per-unit figure for pricing, and the landed cost calculator for the true delivered cost of an import including duty and tax. The comparison table further up this page matches each tool to the situation it fits.
How accurate are these calculators?
The arithmetic is exact and every result shows its own working, so you can check it line by line. Where a calculation needs a real-world value that varies - a courier divisor, a duty rate - it is an input you supply rather than a number we guessed, because a stale constant hidden inside a tool is worse than no tool at all.
Where do the numbers come from?
Most of these tools are pure arithmetic with nothing to source: a cubic metre is a million cubic centimetres and always will be. Where a tool does depend on a published figure, that figure is listed with its source and a last-checked date at the bottom of the page, and the page says so plainly if something is still being verified.
Can I use a result on a customs declaration or a booking?
Use it to plan, check a quote and question an invoice, but not as the declared figure itself. A booking or an entry has to match what the carrier measured and what your broker classified, and those can differ from a calculation for reasons nothing on this site can see - dimension rounding, a reweigh at the depot, a classification call. Every page says the same thing at the bottom, and the disclaimer says it in full.
Can I share a result with my supplier or forwarder?
Yes. Every calculator writes your inputs into the page address as you type, so copying the link sends the exact result you are looking at. There is a copy button under each result. The recipient sees your numbers already filled in and can change them.
Is my data stored anywhere?
No. Every calculation runs entirely in your browser using plain JavaScript, and the numbers you type are never transmitted, logged or stored. The site does use Google Analytics to count page visits, which sets a cookie and records standard visit data such as which page you opened and roughly where from - but the page address it is given has the calculation stripped out of it first, so it never receives your carton dimensions, weights or costs. The only thing that carries your numbers is a share link, and only if you choose to send one.
Which units are supported?
Where it matters, both. Dimensions can be entered in centimetres, metres, inches or feet, and weights in kilograms or pounds. Volumetric weight is the exception: it asks for a unit system rather than separate toggles, because a divisor is only valid for the unit pair it was published against.
Are these free? Is there a paid version?
They are free, with no account and no signup, and the calculators are going to stay that way. The site will carry advertising once it is established enough to qualify, and that is the business model for now. If paid features are ever added they would sit alongside these tools, not in front of them.
Who built this?
One person, publicly. The site is deliberately narrow - freight and logistics maths, nothing else - because a small set of tools that are right beats a large set that are approximately right. If a number here looks wrong, the contact page has a real email address on it.