Subsea Cable Carbon Calculator

Estimate the lifecycle carbon footprint of a submarine cable system.

–t CO₂e

Trans-Atlantic · total lifecycle footprint

–t CO₂e / km

–t CO₂e / km · yr

–t CO₂e / Tbps

–g CO₂e / (Pb·km)

Phase	t CO₂e	%

About this tool. It reproduces the calculation chains of The Subsea Cable Carbon Emissions Calculator (trans-Atlantic and trans-Pacific editions), a project of Sustainable Subsea Networks (v1.15, July 2026). The interface provided customized number for given transoceanic cable, with default values for generic oceanic cables. The built-in figure and formula lives in the source spreadsheets, free to download and explore.

⬇ Trans-Atlantic CF (public) ⬇ Trans-Pacific CF (public) 📄 Full paper (link on publication)

The accompanying paper's appendix documents the basis of each data point and thanks the industry partners who provided data — our gratitude to them for making this work possible.

Funded by Sustainable Subsea Networks and the Internet Foundation.

required you should set this for your project · default an industry-average estimate is provided