Determine the rod material density
Measure the rod length
Measure the rod diameter or cross-sectional dimensions
Calculate the cross-sectional area
Calculate the rod volume
Multiply volume by density to get weight
Use the formula: Weight = Volume × Density
For a cylindrical rod, use: Weight = π × (d² / 4) × L × ρ
For a rectangular rod, use: Weight = Width × Height × Length × ρ
Convert all measurements to consistent units before calculating