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A: It is very easy to calculate theoretical paint coverage. The equation is as follows:

Coverage (ft2) = 1604 x Gals used x %Volume solids x %transfer efficiency Film thickness (mils)

Where 1,604 is the number of sq. ft. that a solid gallon will cover at a thickness of 1.0 mils.

Example:
What is the coverage for 1 gallon of paint with 52% volume solids which is applied by spray with an approximate transfer efficiency of 30%? The dry film thickness of the applied coating is 1.5 mils.

Coverage (ft2) = 1,604 x 1 gal x 0.52 x 0.3

1.5 mils

Coverage (ft2) = 167 ft2.

You can usually get the volume solids of the coating from a technical data sheet, but you must guess at the transfer efficiency.

By manipulating the equation you can now figure out the number of gallons required to do a job if you have the remainder of the information.

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15y ago

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