This calculator estimates annual carbon emissions for a small leisure boat with an internal combustion engine
and compares them with an electric propulsion scenario. It also shows the potential emissions reduction from electrification.
Input Data
Boat Activity
Presets only provide example default values.
Used for the internal combustion scenario.
Total annual engine runtime.
Fuel use in liters per operating hour.
Internal Combustion Scenario
kg CO₂e per liter of fuel. Example values: gasoline ≈ 2.31, diesel ≈ 2.68.
Optional additional emissions in kg CO₂e/year.
Electric Scenario
kWh per operating hour for the electric propulsion system.
kg CO₂e per kWh for charging electricity.
Extra electricity required due to charging inefficiency, in %.
Optional additional emissions in kg CO₂e/year.
Battery Replacement (Optional Annualized Impact)
Total installed battery capacity in kWh.
kg CO₂e per kWh of battery capacity.
Years over which battery embodied emissions are annualized.
Useful for a lifecycle-oriented comparison.
ICE annual emissions = (Hours × Fuel use per hour × Fuel emission factor) + ICE maintenance
Electric annual emissions = (Hours × Electricity use per hour × (1 + charging losses) × Grid emission factor)
+ Electric maintenance
+ Annualized battery impact (optional)
Emissions reduction = ICE annual emissions − Electric annual emissions
Reduction rate (%) = (Emissions reduction / ICE annual emissions) × 100
Results
Annual Internal Combustion Emissions
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Annual Electric Scenario Emissions
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Annual Emissions Reduction
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Reduction Rate
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Annual Fuel Use
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Annual Electricity Demand
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This is a simplified demonstration calculator. For formal studies, use validated assumptions for propulsion load,
duty cycle, fuel type, engine efficiency, electricity mix, charging behavior, and lifecycle emissions.