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Air vs Ocean Freight Carbon Comparator
Compare air and sea cargo kg CO2e per shipment.
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About Air vs Ocean Freight Carbon Comparator
Free freight comparator: cargo weight and distance into air belly-cargo vs container-ship kg CO2e per ton-km. For importers and logistics teams. No signup.
The 50x gap
Air belly cargo emits roughly 0.6 kg CO2e per ton-km against about 0.012 for a container ship: a fifty-fold difference. Mode choice dwarfs every other logistics decision.
When air still wins
Perishables, urgents and low-weight high-value goods can justify air on economics. This tool prices the carbon side so the tradeoff is explicit in procurement.
📐 Methodology & Reference Accuracy:
Calculations, formulas, and conversions execute locally in your web browser. Output models are benchmarked against official reference standards and updated for 2026.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.
Background reading: Freight Emission Comparator on Wikipedia. More: all calculators.
Frequently Asked Questions about Air vs Ocean Freight Carbon Comparator
How much worse is air freight than ocean?
About 50 times worse per ton-km: roughly 0.6 kg CO2e for air belly cargo versus 0.012 kg for container ships.
How do I convert nautical miles?
Multiply by 1.852 to get kilometers. The tool does it automatically when you pick nautical miles.
Does weight or distance matter more?
Both multiply together as ton-km, so halving either halves emissions. Mode choice matters most of all.
Are these carrier-accurate?
No. Real figures vary by aircraft, load factor and route. Use these for mode comparison, then confirm with carrier data.
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