In North America the term "weight per gallon" ( wpg ) is used in the coating industry. The volume of the weight per gallon cup is such that, at a specified temperature, the numerical value in grams of water that it can hold is equal to, or ten times greater than, the numerical value in pounds of water that a gallon container can hold. A US gallon of water weighs 8.32 pounds, thus a Regular US weight per gallon cup holds ten times this amount in volume, 83.2 ml. When taking a measurement, the cup and the sample must be brought to the same equilibrium temperature (usually 25 °C or 77 °F).
- Made from corrosion resistant steel
- Easy conversion to a weight per gallon
- Precisely made for maximum accuracy
- Cup designs compliant with ASTM D 333, D 1475, D 2805