Calculate your ship CII rating

Estimate your Carbon Intensity Index for free and reach out for services dedicated to the shipping industry.

Marinsights - Gas Emission for CII calculations

Carbon Intensity Index (CII) is the result of a formula combining various elements as the travelled distance, ship technical informations and combustible data.
The indicator given here is an estimation based on the major factor of this formula.

Opsealog Carbon Intensity Indicator (CII) enables you to review your vessel’s rating with a simplified estimation.

CII Regulation

CII regulation applies to ships of 5,000 GT and above.


This calculator is based on the IMO guidelines MEPC 338(76), 352(78), 353(78), 354(78), 355(78).


Opsealog system are certified by Verifavia for EU MRV and IMO DCS.

Generated report

This free report does not constitute the regulatory statement of compliance document required by the IMO

Beyond CII calculation


Don't add another excel report to fill, clean and aggregate. Enjoy an ecosystem designed for your crews and you.


Calculating CII is easy. But automatizing these calculations based on clean data for accurate results is our expertise.


CII is an ever evolving challenge : plan you will have to operate you vessels in the coming years to remain compliant.

Streamlog - Timesheet for CII data report

Carbon Intensity Index as a chance

Seize the opportunity to join the path toward digitalization and enjoy its benefits


Streamlog is a digital tools dedicated to the maritime industry for recording continuously ship informations


Marinsights is a web portal to put concrete numbers on your specific KPI and measure success


Take data driven decisions for your fleet and you company, for a low environmental impact bright future

Gain of time
Gain of quality
Gain of efficiency

Opsealog is trusted

See what our partners say about us

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We are confident that Opsealog’s digital solutions will facilitate the transition for environmentally-minded maritime pioneers.

Antidia Citores - Program Manager at Green Marine Europe
5 / 5

The pertinent analysis from Opsealog enabled us to take suitable decisions, resulting in a considerable reduction in our overall fuel usage.

Cpt Mohamed Al Ali - Senior VP at ADNOC Logistics & Services
5 / 5

We are proud to partner with Opsealog on this journey that will support the offshore oil and gas sector as it moves towards sustainability.

Dr. Urban Siller - CEO at Identec Solutions

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Frequently asked questions

about Carbon Intensity Index in the maritime industry.

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