Cost of Inaction Calculator

Quantify the financial and emissions impact of hull fouling on your vessel

Vessel Parameters

Vessel Type

Typical Route

Short haul — coastal (~3,000 nm)Medium haul — trans-ocean (~8,000 nm)Long haul — global (~15,000 nm)

Daily Fuel Consumption (mt/day)clean hull, service speed

Default for Container Ship: 150 mt/day

Bunker Price ($/mt)$550/mt

$300/mt (low) — $1,000/mt (high)

Hull Fouling RatingFR2 — Moderate

FR0
Clean

FR1
Slight

FR2
Moderate

FR3
Heavy

FR4
Very Heavy

FR5
Severe

+7% fuel penalty≈ 10.5 extra mt/day

Extra cost / day

$5,775

10.5 mt extra fuel/day

Extra cost / month

$173,250

30-day basis

Extra cost / year

$2,107,875

365-day annualised

CO₂ penalty / year

11,934.4 mt

at 3.114 mt CO₂ per mt fuel

Value comparison

Your fouling penalty / mo$173,250

vs.

Hullproof Professional / mo$999

You could save

$172,251/mo

What You Lose by Waiting

Cumulative extra fuel cost — months 1 through 6

Month 1

$173,250

Month 2

$346,500

Month 3

$519,750

Month 4

$693,000

Month 5

$866,250

Month 6

$1,039,500

At FR2 (Moderate) with $550/mt bunkers, every month of inaction costs $173,250 in avoidable fuel spend. After 6 months: $1,039,500.

Methodology: Fuel penalties based on IMO fouling rating scale (FR0–FR5). Penalty percentages: FR0 = 0%, FR1 = 3%, FR2 = 7%, FR3 = 12%, FR4 = 18%, FR5 = 25%. CO₂ conversion factor: 3.114 mt CO₂ per mt HFO (ISO 8217). Default fuel consumption values represent industry averages at design service speed. Actual savings will vary by vessel condition, speed profile, and operating area.