Carriage Bolt Weight Calculator Carriage Bolt Weight Calculator Calculator Shank Diameter (D) in inches: Length (L) in inches: Calculate Weight For More Information SizeUnder body Shank Dia (D)Full body shank Dia (D)1/4″0.2120.253/8″0.1280.3751/2″0.2280.4955/8″0.3750.6253/4″0.5440.751″0.9751.00