What formula is used to calculate copper round bar weight?

The formula is: Weight = (π ÷ 4) × Diameter² × Length × Density. Diameter and length are converted to meters, multiplied to get volume (m³), then multiplied by copper density (8960 kg/m³) to get weight in kilograms.

What is the density of copper?

Pure copper has a density of 8960 kg/m³ (0.324 lb/in³). This value is standard for commercially pure copper (C11000 / electrolytic tough pitch copper) used in most industrial applications.

Does this tool support imperial units?

Yes. Diameter can be entered in mm, cm, or inches. Length can be entered in meters, mm, feet, or inches. All values are converted internally to meters before the calculation.

Can I calculate total weight for multiple bars?

Yes. Enter the number of bars in the Quantity field and the calculator will show both the per-bar weight and the total weight for the entire batch.

Why is copper so much heavier than aluminum?

Copper (8960 kg/m³) is about 3.3 times denser than aluminum (2700 kg/m³). This is why copper is often substituted with aluminum for overhead power lines where weight is critical, even though copper has better electrical conductivity.

Is this calculator suitable for copper alloys like brass or bronze?

This tool uses pure copper density (8960 kg/m³). Brass (8400–8700 kg/m³) and bronze (8800–8900 kg/m³) have slightly different densities. For those materials, use a dedicated brass or bronze calculator for accurate results.

Copper Round Bar Weight Calculator

Enter diameter and length to instantly calculate copper round bar weight in kg and lbs.

Bar Dimensions

Diameter

Length

Quantity (bars)

Formula Reference

W = (π / 4) × D² × L × 8960

Where D = diameter (m), L = length (m), 8960 = copper density (kg/m³), W = weight (kg).

Enter dimensions on the left and click Calculate.

Copper vs. Common Metals

Material	kg/m³	lb/in³	Common Use
Copper (C11000)	8960	0.3237	Electrical, plumbing
Brass (C26000)	8530	0.3081	Fittings, valves
Bronze (C93200)	8830	0.3189	Bearings, bushings
Steel (A36)	7850	0.2836	Structural
Aluminum (6061)	2700	0.0975	Lightweight structures

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Summary

Enter diameter and length to instantly calculate copper round bar weight in kg and lbs.

How it works

Enter the bar diameter in millimeters, inches, or centimeters.
Enter the bar length in meters, millimeters, feet, or inches.
Optionally enter a quantity to calculate weight for multiple bars.
The calculator applies W = (π/4) × D² × L × 8960 to get weight in kilograms.
The result is also converted to pounds (1 kg = 2.20462 lb).
Click Copy to save the result to your clipboard.

Use cases

Estimating copper material weight for electrical and plumbing projects.
Calculating freight and shipping weight for copper bar stock orders.
Preparing bill of materials (BOM) for CNC machining and fabrication.
Verifying load limits on lifting and handling equipment.
Cost estimation for copper stock purchases by weight.
Comparing copper weight against aluminum or steel alternatives.
Material planning for heat exchanger and conductor manufacturing.
Checking raw material requirements for busbar and switchgear assemblies.

Frequently Asked Questions

Last updated: 2026-09-19 · Reviewed by Nham Vu