Anti-Fouling Paint Calculator

Calculate antifouling paint quantity from hull surface area, target DFT, volume solids, and application method.

Hull surface area (m²)

Target DFT per coat (µm)

Number of coats

Volume solids (%)

Transfer efficiency (%)

Can size (liters)

Tab to move between fields

Theoretical volume (L)

27.78

Cans to purchase

Practical volume (L)29.24

Volume purchased (L)30

Coverage rate (m²/L)3.6

Wet film thickness (µm)277.8

How to Use This Calculator

Enter vessel length (m), beam (m), and draft (m) to calculate wetted surface area.
Enter anti-fouling paint type (self-polishing, hard, or ablative) and dry film thickness (microns).
Read required paint volume (liters) and number of coats for full wetted surface coverage.
Account for roughness allowance and irregular surface areas (keels, rudders) in total area estimate.
Plan for re-application intervals: self-polishing types typically last 3-5 years depending on trade.

How the result changes with Volume solids (%)

Hull surface area (m²): Wetted hull area to be coated in square meters.
Target DFT per coat (µm): Desired dry film thickness per coat in microns. Typical antifouling: 100–150 µm.
Number of coats: Number of coats to apply. Minimum 2 recommended for antifouling.
Volume solids (%): Percentage of wet paint volume remaining after solvent evaporation (from TDS).
Transfer efficiency (%): Paint reaching the surface. Roller ~95%, brush ~90%, airless spray ~65%.
Can size (liters): Volume per paint can in liters for purchase calculation.

Theoretical volume (L): Paint volume needed with zero waste at target DFT.
Practical volume (L): Adjusted for application transfer efficiency losses.
Cans to purchase: Number of cans to buy (rounded up).
Volume purchased (L): Total paint purchased based on can count.
Coverage rate (m²/L): Theoretical spreading rate at target DFT and volume solids.
Wet film thickness (µm): Required WFT per coat to achieve target DFT: WFT = DFT / (vol. solids / 100).

Identify Input Parameters
4 parameters
Hull surface area (m²) = 50, Target DFT per coat (µm) = 125, Number of coats = 2, Volume solids (%) = 45 = 6 input(s) provided
Calculate Theoretical volume
Theoretical volume = theoreticalVolumePerCoat * coats
27.78 = 27.78
Calculate Cans to purchase
Cans to purchase
12 = 12
Calculate Practical volume
Practical volume = theoreticalVolumeTotal / (transferEfficiency / 100)
29.24 = 29.24
Calculate Volume purchased
Volume purchased = cansNeeded * canSize
30 = 30