The weight of a bronze plaque can be estimated by calculating the plaque’s volume in inches (height x width x depth) x .31. For smaller plaques (under 36″ x 30″) allow .25″ as the approximate depth. Use .375″ for plaques over 36″ x 30″.
Example: For a 36″ x 24″ plaque calculate 36″ x 24″ x .25″ = 216 cu. inches x .31 = 66.96. The plaque’s estimated weight would be 67 lbs.
An aluminum plaque is approximately 1/3rd the weight of a comparable sized bronze plaque.