Marine, Shipbuilding & Boat Manufacturing worked example

Marine Coating Coverage at 23% overspray and waste factor: a worked example

What does the result look like when overspray and waste factor reaches 23%? The full calculation is worked below with real intermediate numbers. Use it to order the correct quantity of antifouling, primer, topcoat, or gelcoat for a hull paint job without over- or under-ordering.

The inputs for this scenario

  • Surface area to coat: 55 m² (unchanged)
  • Number of coats: 3 coats (unchanged)
  • Theoretical coverage rate: 8 m² / L (unchanged)
  • Overspray and waste factor: 23 % (raised for this scenario; the documented default is 20)

Working through the calculation

  • Applying the documented formula (Theoretical coating volume = (surface area x number of coats) / theoretical coverage rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 2,063 L for total coating to order, the number this scenario is built around.
  • At this operating point the engine returns 165 L for theoretical coating volume (no waste).
  • At this operating point the engine returns 1,898 L for overspray and waste volume.
  • At this operating point the engine returns 8 % for application transfer efficiency.

How this compares with the baseline

  • Against the tool's baseline example, where overspray and waste factor sits at 20% and the headline result is 2,063 L, this scenario lands almost exactly on the baseline at 2,063 L.
  • A figure at this level is achievable when overspray and waste factor is genuinely sustained, not just peaked for a shift. Theoretical coverage rate assumes uniform film build; real consumption rises on rough or pitted steel and with airless spray, so the waste factor must be set to match the substrate and method.

Results at a glance

  • Total coating to order: 2,063 L (headline result)
  • Theoretical coating volume (no waste): 165 L
  • Overspray and waste volume: 1,898 L
  • Application transfer efficiency: 8 %

Run it with your numbers

  • Every input above is editable in the live Marine Coating Coverage calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.