Work out coating thickness instantly with clear inputs, formula shown and shareable results.
Only the solids remain after the solvent flashes off, so wet film thickness must be dry film thickness divided by volume solids. Theoretical coverage is 1000 x volume solids divided by target DFT in microns, and multiplying by transfer efficiency gives the practical spreading rate that accounts for overspray and surface profile losses.
Wet film
WFT = DFT / volume solids fraction
Coverage
Theoretical m²/L = 1000 x volume solids / DFT µm; practical = theoretical x transfer efficiency
WFT = DFT / volume solids fraction. Only the solids remain after the solvent flashes off, so wet film thickness must be dry film thickness divided by volume solids.
Airless and conventional spray lose material to overspray, bounce-back and edge effects. Brush and roller reach 90 percent or better but cannot match spray on rate or film uniformity.
This calculator takes 4 inputs: Target dry film thickness, Volume solids of paint, Transfer efficiency, Area to coat. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.