Technical estimator
Round-bar weight estimator
Estimate gross cylindrical stock weight from diameter, length, density, and quantity.
A transparent estimate.
Estimate gross cylindrical stock weight from diameter, length, density, and quantity.
This is a gross round-bar estimate, not finished bolt weight. It does not model heads, threads, chamfers, nuts, washers, or material removed in machining. For shipping or purchase acceptance, obtain the actual part weight from the team.
Calculation
π × (diameter ÷ 2)² × length × density × quantity
The default density of 0.283 lb/in³ is an approximate steel value inherited from the published calculator. Enter the actual material density for your estimate.
Your specification.
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