Energy Calculator

Compare two fuel scenarios for the same energy demand. Estimate required mass, fuel cost, direct combustion CO₂, and an illustrative EU ETS allowance cost.

Method, assumptions, and limits

Both scenarios use the same requested energy. The default LCV and direct CO₂ factors illustrate HFO and MDO/MGO values in Regulation (EU) 2023/1805. All prices, demand, scope, and exchange-rate values are editable assumptions, not live market quotes.

• Energy demand (GJ) = daily energy demand × voyage days.
• Required fuel (t) = energy demand ÷ LCV (GJ/t). Direct CO₂ (t) = fuel mass × combustion factor (tCO₂/t).
• EU ETS illustration (EUR) = direct CO₂ × selected voyage share in scope × assumed EUA price.

The estimate excludes engine and propulsion efficiency changes, auxiliary loads, fuel quality variation, well-to-tank emissions, CH₄ and N₂O, port and route applicability, taxes, logistics, storage, and other voyage costs. EU ETS includes CH₄ and N₂O from 2026; this simplified calculator models CO₂ only.

This tool does not calculate FuelEU Maritime compliance or an IMO CII rating. FuelEU requires verified annual ship energy and pathway-specific well-to-wake factors. CII requires annual fuel, ship capacity, distance, ship type, and applicable corrections.

Method and source links reviewed 6 October 2026.

Scenario Cost Difference

$1,755

Fuel A has the lower estimate for the selected assumptions

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