AIEngineeringTool

Round Bar Mass Calculator

Calculate the mass of a solid round bar from diameter, length and density.

Bar diameter: 30 mm
Live concept view — geometry scales with the entered design condition.

Calculate the mass of a solid round bar from diameter, length and density.

Design inputs

Enter known values using the units shown. Results and the live SVG view update immediately.

PRELIMINARY RESULT

Bar volume0.00071 m³

Estimated mass: 5.55 kg

Bar volume
0.00071 m³
Estimated mass
5.55 kg

Calculation detail

Formula: m = πd²Lρ / 4

The circular cross-section and length establish volume, which is converted before applying density.

FORMULA VERIFICATION

Units, scope and reference

Reference: NIST SP 811 unit relationships and m = ρV.

Internal unit basis: mm³ converted to m³; kg/m³. Outputs: m³, kg.

Valid conditions: Positive dimensions and documented density.

Limitations: Uniform solid bar only.