Wet and Dry Film Thickness Formulae
FORMULAS, CONVERSIONS AND EQUATIONS FOR
WET FILM THICKNESS, DRY FILM THICKNESS
& COVERAGE OF COATINGS
Easily convert and calculate the wet and dry film thickness and coverage of coatings applied to a substrate. Percentage of solids by volume in a coating will usually be known. Check the instructions for use of the coating or the 'Material Safety Data Sheet' (MSDS).
'Wet Film Thickness' (WFT) = W (This may be known, specified or calculated)
'Dry Film Thickness' (DFT) = D (This may be known, specified or calculated)
Percentage of Solids By Volume in Coating = P (This may be known, specified or calculated)
Percentage of Reducer By Volume added to Coating = R
Note that P & R should be expressed as a decimal less than 1. For example 72% would be 0.72
THICKNESS CALCULATIONS:
No Reducer or Thinner is added to Coating:
If Reducer or Thinner is added to the coating:
COVERAGE CALCULATIONS:
From the above equations, wet film thickness (WFT) may be easily calculated for a specified dry film thickness (DFT). If the wet film thickness is known the coverage of a coating in square feet per gallon may be calculated using the following formula:
Coverage in 'Square Feet Per Gallon' = 1604.17 Divided By the 'Wet Film Thickness in MILS
(** Above formula is based upon one gallon having a volume of 231 cubic inches)
For example: If the 'Wet Film Thickness is 10 MILS (0.010")
Coverage is: 1604.17 Divided by 10 which is 160.417 square feet per gallon.
- VIEW CATALOG FOR WET FILM THICKNESS GAUGES
- VIEW CATALOG FOR MODEL 2735ACERT CERTIFIED WET FILM THICKNESS GAUGES
- VIEW CATALOG FOR MODEL 735ATOC CUSTOM IMPRINTED WET FILM GAUGES
- VIEW INSTRUCTIONS ON HOW TO USE A 'WET FILM GAUGE'
