Material EngineeringP0

Round Bar Weight Calculator

Calculate the weight of round steel bars and rods from diameter and length.

Inputs

Enter your values below

Bar Diameter*mm

Bar Length*m

Material

Result

Bar Weight

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Enter values and click Calculate

Formula

π × (diameter ÷ 2)² × length × density

Result unit: kg

Weight = π × (D/2)² × L × ρ. Cylinder volume times density. Diameter and length in meters after conversion.

Introduction

Calculate the weight of a round bar or solid rod from its diameter and length. Used for steel reinforcing bars, shaft stock, and raw material ordering.

Calculation Example

A 50mm diameter × 6m long carbon steel round bar weighs approximately 92.5 kg.

Inputs: diameter=50, length=6, density=7850

Result: 92.53 kg

Engineering Applications

•Rebar estimating
•Shaft stock ordering
•Machining material calculation
•Steel fabrication

Frequently Asked Questions

What is the weight per meter of steel round bar?

Weight per meter (kg/m) = π × (D/2)² × ρ. For 50mm steel: π × 0.000625 × 7850 ≈ 15.4 kg/m.

Does this work for rebar?

Yes, for plain round bars. Deformed rebar is typically 1-2% heavier due to ribs.

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Disclaimer: Calculations are for reference and educational purposes only. Always verify results independently for engineering design. See full disclaimer.