Estimate fuel savings, payback and ROI from underwater hull
cleaning. Model current fouling penalty, clean-hull fuel
consumption, fuel price, operating days, cleaning cost,
off-hire, fouling regrowth, CO₂ avoided and the break-even
point for a cleaning project.
Fouling Penalty
Extra fuel burn above the vessel's clean-hull reference consumption
Fuel Savings
Fuel avoided as hull resistance falls after cleaning
Cleaning ROI
Fuel-value benefit compared with cleaning, inspection and off-hire cost
Vessel Fuel Profile
Start with the vessel's estimated clean-hull
daily fuel burn at the operating profile being analyzed.
MT/day
days
%
%
$
/MT
months
Cleaning Cost
Include cleaning, inspection and any commercial
downtime directly caused by the project.
$
$
days
$
/day
tCO₂/MT
Hull Condition & Operating Profile
Advanced mode models gradual fouling regrowth
after cleaning rather than assuming constant savings.
MT/day
days
%
%
%
Used to model linear fouling regrowth after cleaning.
months
%
Fuel Economics
$
/MT
%/year
tCO₂/MT
$
/tCO₂
%
Cleaning Project Cost
$
$
$
$
days
$
/day
%
Hull Cleaning Results
Simple hull-cleaning savings estimate
Enter vessel data
Enter clean-hull fuel burn, operating days, fouling
penalty, fuel price and cleaning cost to estimate
hull-cleaning fuel savings and ROI.
Net Project Benefit
—
Fuel and carbon-value savings minus the modeled cleaning project cost
Fuel Saved
—
Estimated fuel avoided during the selected benefit period
Cleaning Project Cost
—
Gross Fuel Savings
—
Simple ROI
—
Simple Payback
—
Project NPV
—
Discounted Payback
—
Current Fouled Burn
—
Post-Cleaning Burn
—
Average Fuel Saved / Sea Day
—
CO₂ Avoided
—
Break-Even Fuel Price
—
Break-Even Fouling Penalty
—
Savings Breakdown
Hull Cleaning ROI Summary
Monthly Savings Profile
Advanced mode includes fouling regrowth
Month
Avg Penalty Without Cleaning
Avg Penalty After Cleaning
Fuel Saved
Fuel Value
Carbon Value
Net Monthly Benefit
Hull Cleaning Sensitivity
Fuel price vs fouling penalty
Penalty \ Fuel Price
-20%
Base
+20%
Hull cleaning note:
Project guidance will appear after calculation.
Model approach:
clean-hull fuel burn is treated as the reference.
Fouling penalty is the incremental fuel percentage
above that reference. Simple mode assumes the entered
post-cleaning penalty stays constant for the benefit
period. Advanced mode assumes the cleaned-hull penalty
rises linearly from the post-cleaning value to the
entered end-of-period penalty. The uncleaned comparison
remains at the entered current fouling penalty. Results
therefore show the value of cleaning now versus
continuing to operate at the current condition.
Planning estimate only.
Actual hull-cleaning savings depend on vessel speed and load
profile, weather, trim, draft, coating condition, propeller
condition, fouling type and distribution, sea temperature,
idle periods, trading route, cleaning quality and measurement
method. Cleaning permissions, capture requirements and
biofouling rules vary by port and jurisdiction. Use verified
performance data and local requirements before making
operational or compliance decisions.
