Ship CO₂ Emissions Calculator

Ship Universe Maritime Tool

Ship CO₂ Emissions Calculator

Calculate ship CO₂ emissions from fuel consumption, voyage distance and vessel operating profile. Estimate sea and port emissions, CO₂ per nautical mile, transport-work carbon intensity, annual emissions and optional carbon-cost exposure.

Combustion CO₂

Fuel consumed × editable fuel-specific CO₂ conversion factor

Voyage Intensity

CO₂ per nautical mile, voyage day and optional tonne-nautical-mile

Annualization

Scale a representative voyage into estimated annual fuel and CO₂

Voyage Profile

Estimate fuel and CO₂ from voyage distance, speed and average daily consumption.

Voyage distance

Average sea speed

Sea fuel consumption

MT/day

Port / idle time

days

Port / idle consumption

MT/day

Cargo carried (optional)

tonnes

Used only for transport-work intensity.

Fuel & CO₂ Factor

Conversion factors remain editable so vessel-specific or documented values can be used.

Fuel type

CO₂ conversion factor

tCO₂/MT

Similar voyages per year

voyages

Carbon price (optional)

$ /tCO₂

Carbon-price exposure

Generic commercial exposure only. It does not automatically apply EU ETS or another regulatory scope.

Voyage Activity

Use a laden-ballast voyage cycle for more detailed distance and transport-work analysis.

Laden distance

Laden speed

Ballast distance

Ballast speed

Port / waiting days

days

Cargo carried (optional)

tonnes

Actual Fuel Consumption by Fuel

Enter voyage fuel quantities directly. Separate sea and port quantities for each fuel used.

Fuel

Sea MT

Port MT

CF tCO₂/MT

Annualization & Carbon Cost

Similar voyages per year

voyages

Carbon price (optional)

$ /tCO₂

Carbon-price exposure

Ship Emissions Results

Simple voyage CO₂ estimate

Enter voyage data

Enter voyage distance, speed and fuel consumption to calculate vessel CO₂ emissions.

Voyage CO₂ Emissions

—

Combustion CO₂ based on entered fuel factors

Total Fuel Consumed

—

Sea plus port fuel

Sea CO₂

—

Port CO₂

—

CO₂ per Nautical Mile

—

CO₂ per Voyage Day

—

Transport-Work Intensity

—

Weighted CO₂ Factor

—

Sea Days

—

Total Voyage Days

—

Annual CO₂

—

Annual Fuel

—

Carbon-Cost Exposure

—

Fuel Cut for 10% CO₂ Reduction*

—

Emissions Breakdown

Fuel Emissions Detail Combustion CO₂

Fuel	Sea Fuel	Port Fuel	Total Fuel	CF	CO₂	Share

Emissions Summary

CO₂ Intensity Sensitivity Fuel use vs distance

Fuel \ Distance	-10%	Base	+10%

CO₂ is not the same as lifecycle GHG emissions: this calculator estimates direct combustion CO₂. It does not automatically add methane slip, nitrous oxide, upstream production, fuel transport or other well-to-wake emissions. This distinction is especially important when comparing alternative fuels.

Method: CO₂ emissions equal fuel consumed × the entered fuel-specific CO₂ conversion factor. Simple mode derives fuel consumption from voyage days and daily burn. Advanced mode uses actual fuel quantities entered for each fuel and separates sea from port emissions. Transport-work intensity is shown only when cargo carried is entered. *The 10% fuel-cut result assumes the same fuel mix and a proportional relationship between fuel consumed and direct CO₂ emissions.

Planning estimate only. Actual reported or regulated emissions may require verified fuel-consumption data, fuel-specific documentary factors, density or mass-conversion procedures, correction factors, exclusions and jurisdiction-specific methodologies. Alternative fuel lifecycle emissions can differ materially from direct combustion CO₂. This calculator does not replace IMO DCS, CII, EU MRV, EU ETS, FuelEU Maritime or other official compliance calculations.

Results copied

By the ShipUniverse Editorial Team — About Us | Contact