Fouling Penalty • Fuel Recovery • Regrowth Curve • Cleaning Cost • Off-Hire • CO₂ Avoided • Payback • NPV • IRR
Hull Cleaning ROI & Fuel Savings Calculator
Turn measured hull-performance deterioration into a cleaning decision. Estimate immediate and cycle-average fuel recovery, annual bunker savings, off-hire and cleaning cost, CO₂ reduction, payback, NPV and IRR. Advanced mode adds fouling regrowth, recurring cleaning cycles, capture/waste cost, coating-risk allowance, carbon value and stress testing.
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Need fouling regrowth, repeat-cleaning cycles, capture/waste cost, carbon value or coating-risk allowance? Click Advanced above.Simple treats one cleaning event and uses the entered clean-hull reference plus recovery percentage.PerformanceRecovered fuel burn
EconomicsPayback, NPV & IRR
ThresholdBreak-even recovery
Hull Performance Baseline
t/day at the operating condition being screened.
t/day at a comparable draft, speed and weather condition.
% of the measured fouling penalty expected to be removed.
days.
currency/day.
years. Simple assumes the recovered savings persist for this screening horizon.
%.
Measured Performance & Operating Profile
Use weather-normalized vessel data where possible. The tool does not assign a generic fuel-saving percentage to a fouling grade.
Linear planning model after cleaning.
months between repeat cleaning events.
tCO₂/t fuel, editable planning factor.
% of avoided CO₂ economically valued.
Cleaning Event & Compliance Cost
Owner planning allowance, not a predicted coating-damage cost.
Investment Horizon & Stress Cases
Stress the actual decision drivers. Each row recalculates NPV, payback and first-year savings.
| Case | Fuel price Δ% | Recovery Δ pts | Regrowth months Δ% | Cleaning cost Δ% |
|---|
Biofouling / Cleaning Readiness
Engineering / commercial screen: Use weather-normalized vessel performance where possible. Hull fouling, propeller condition, draft, trim, sea state, speed, engine loading and coating condition all influence observed fuel burn. Advanced regrowth is a user-entered linear planning model, not a biological prediction. Confirm local in-water-cleaning restrictions, capture requirements and coating-maker limitations before scheduling work.