Ship Carbon Intensity Indicator (CII) Calculator
Analyze your vessel's carbon intensity rating. Estimate voyage emissions, model weather resistance, and optimize operational speed profiles.
Vessel Specifications
1. Sea Conditions
Retrieving weather forecast for vessel location...
2. Operational Information
3. Expected Consumptions while sailing
| Consumer | Fuel Type | Sea Cons. (MT/Day) | Port Cons. (MT/Day) | Total Consumption |
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About the CII Calculator
This interactive tool lets shipowners and operators evaluate their vessel's operational energy efficiency based on the International Maritime Organization (IMO) MARPOL Annex VI regulations. By inputting details about sea conditions, operational speed, draft, and fuel consumption, you can simulate and optimize your annual operational Carbon Intensity Indicator (CII).
How CII is Calculated
The attained CII represents the carbon emissions of the ship per cargo capacity (usually Deadweight Tonnage, DWT) and nautical mile. Added wave and wind resistance (modeled using Douglas Sea State and Beaufort scales) as well as hull degradation increase power requirements, leading to speed loss or higher fuel consumption. This tool allows you to simulate these effects dynamically.
Compliance Requirements
Ships are rated from A (major superior) to E (inferior). A rating of C or better is required. Vessels receiving a D rating for three consecutive years, or an E rating in a single year, must develop a corrective action plan as part of their Ship Energy Efficiency Management Plan (SEEMP) Part III.