Describe a shipment the way you would to a colleague. You get a CO2e breakdown by leg, every assumption spelled out, and an honest read on which of those assumptions actually moves the number.
Try one of these, or describe your own shipment.
Enter to send · Shift+Enter for a new line
Describe a freight movement and the breakdown, assumptions, and sensitivity analysis appear here.
Everything else — vessel class, load factor, transit time, hub handling — is defaulted from the factor library and disclosed.
Freight emissions accounting is governed by ISO 14083:2023, with the GLEC Framework v3 as its practical implementation. Above both sits the GHG Protocol, where freight lands in Scope 3 Category 4 and Category 9. This tool follows that structure rather than the mass × distance shortcut most free calculators use.
A movement decomposes into transport legs (TOCs) and hub events (HOCs) at ports, terminals, and warehouses. Hub emissions are real and routinely ignored — a chilled warehouse can rival a road leg.
Emissions include upstream fuel production, not only what comes out of the tailpipe. That matters most for electric vehicles, where tank-to-wheel is zero but well-to-wheel plainly is not.
Measured distance beats routed network distance, which beats great-circle plus a correction. Ocean legs use routed sea distances that account for Suez, Panama, and the Cape — great-circle understates Asia–Europe by roughly half.
Light, bulky freight consumes vehicle capacity by volume, not weight. Allocating on gross weight understates it, so chargeable mass uses the constraining basis — the same logic your carrier bills on.
Reefer cargo adds energy to run the unit and refrigerant leakage from F-gases with global warming potentials in the thousands. The second one is the one that usually gets missed.
Contrails and NOₓ roughly double air freight’s warming impact. ISO 14083 excludes them from the headline number, so we show them as their own line rather than quietly folding them in.
Two separate things get conflated in carbon tooling, so it is worth being precise about which one this is. The methodology — how a chain is decomposed, what counts as an emission, how distance and mass are resolved — follows ISO 14083 and the GLEC Framework. The emission factors are our own compilation of representative industry values. They are not the licensed GLEC factor library, and we are not affiliated with the Smart Freight Centre.
Those factors are the right order of magnitude and internally consistent, which makes this genuinely useful for comparing modal options, sizing a lane, or finding the hotspots in a network. It is not what you attach to an assured Scope 3 submission. Every result carries a data-quality tier for exactly that reason — the honest answer depends entirely on what went into it.
Closing that gap means licensed factors or, better, primary fuel data reported by your carriers and wired into your TMS. The calculation engine here is built so that swapping the factor library is a data change rather than a rebuild — which is the work we actually do for clients.