Attained EEXI • Required EEXI • EEDI Reference Line • EPL / ShaPoLi Screen • Power & Speed Sensitivity • Compliance Margin
EEXI Calculator for Existing Ships
Estimate attained EEXI, required EEXI and compliance margin under MARPOL Annex VI. Simple mode handles the core conventional-propulsion screen. Advanced adds verified overrides, correction-factor inputs, separate fuels, power-limitation diagnostics, compliance scenarios and a decision board for technical-file review.
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Need verified correction factors, separate fuels, EPL/ShaPoLi diagnostics or scenario stress? Click Advanced above.Simple is a conventional-propulsion screening model. Use the ship's approved EEXI Technical File and verifier-confirmed inputs for certification.Ship & Propulsion Basis
Exactly 10 core inputs. Required EEXI is generated from ship type/size; the selected fuel supplies the IMO-style CO₂ conversion factor used in the screening numerator.
DWT. Used by most EEDI/EEXI reference lines.
GT. Needed for vehicle-carrier coefficient and cruise capacity.
Total kW for propulsion engines included in the screen.
kW. Enter 0 if no EPL/ShaPoLi limit is modeled.
kn at the modeled EEXI reference power basis.
g/kWh. Use approved/verified data where available.
kW used in the screening numerator.
g/kWh.
Ship & Required EEXI
Optional. Leave blank to use the regulatory reference-line screen.
Aggregate verified capacity/correction-factor effect. Keep 1 if not applicable.
gCO₂/h aggregate approved energy-efficiency-technology credit.
Main Propulsion
Auxiliary & Improvement Assumptions
Planning sensitivity only. Not part of the statutory attained-EEXI formula.
% below required EEXI for owner/project planning.
Power / Speed / SFC Stress Register
Each row changes the current modeled main power, Vref and main SFC. This is an engineering sensitivity register, not a substitute for an approved speed-power curve.
| Use | Case type | Main power Δ % | Vref Δ % | Main SFC Δ % |
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EEXI Technical-File Readiness
Certification boundary: this calculator is a screening and planning tool. Official attained EEXI can require approved speed-power treatment, propulsion-system-specific methodology, verified SFC, correction factors, energy-efficiency-technology terms, and an approved EEXI Technical File. Diesel-electric, turbine, hybrid and unusual propulsion arrangements can require methodology not represented by this conventional-propulsion screen.