Copper Weight Calculator

Shape	Cross-section area formula	Typical use
Round bar / rod	A = π × (d ÷ 2)²	Grounding rod, busbar stock, rivets
Rectangular bar	A = w × h	Flat bar stock, bus bar, brackets
Sheet / plate	A = w × t	Roofing, flashing, cladding, gaskets
Tube / pipe (round, hollow)	A = (π ÷ 4) × (OD² − ID²)	Plumbing supply lines, refrigerant lines, wiring conduit

Material	lb/in³	g/cm³	kg/m³
Copper (pure, wrought)	0.323	8.94	8,940

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Walk-through

How to Use This Calculator

5 steps

1

Pick a shape

Choose round bar/rod, rectangular bar, sheet/plate, or tube/pipe from the Shape dropdown. Each shape shows only the dimension fields it needs.

2

Enter dimensions

Fill in the cross-section dimensions — diameter for round, width and height for rectangular, width and thickness for sheet, outer/inner diameter for tube — in inches or millimeters using the unit toggle.

3

Enter length and quantity

Enter the piece's length (in inches, feet, millimeters, or meters) and how many identical pieces you need. For sheet, length is the long dimension.

4

Read the result

The result updates instantly, showing total weight in pounds and kilograms, plus the cross-section area, volume, and copper density used so you can double-check the math.

5

Check scrap value separately

This calculator gives physical weight only — it does not include a live scrap price. Multiply the weight by a current copper scrap quote if you need a dollar value.

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Reference

Formula & Methodology

3 formulas

Weight from volume and density

Weight = Area × Length × 0.323 lb/in³ × Quantity

Every shape reduces to a cross-section area carried along a length. Multiply that area by the length to get volume, then multiply by copper's density (0.323 lb/in³, or 8,940 kg/m³) to get the weight of one piece, and by quantity for the total order.

Round bar / rod area

A = π × (d ÷ 2)²

d is the bar or rod diameter. This is just the area of a circle.

Tube / pipe (hollow round) area

A = (π ÷ 4) × (OD² − ID²)

The tube's cross-section is a ring: the outer circle's area minus the inner circle's area, where OD and ID are the outer and inner diameters.

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Glossary

Key Terms Explained

6 terms

Copper density Copper's standard engineering reference density is 0.323 pounds per cubic inch (8.94 g/cm³, or 8,940 kg/m³). This calculator uses that single value for every shape — round, rectangular, sheet, and tube.

Tube Hollow copper stock with a round cross-section, sized by outer diameter (OD) and inner diameter (ID). Its wall thickness equals (OD − ID) ÷ 2. Common in plumbing supply lines and refrigerant lines.

Sheet Flat copper stock sized by width, thickness, and length. Thin copper sheet is used for roofing, flashing, cladding, and electrical shielding; thicker plate stock is used for bus bar and structural applications.

Specific gravity A material's density relative to water (1.0 g/cm³). Copper has a specific gravity of about 8.94, meaning it's nearly 9 times as dense as water — denser than steel (about 7.85) and roughly 3.3 times denser than aluminum.

Volume The amount of three-dimensional space a piece of copper occupies, calculated as cross-section area × length. Measured in cubic inches (in³) in this calculator.

Alloy A metal made by combining copper with another element — brass (copper + zinc) and bronze (copper + tin) are the most common. Alloys have different densities than pure copper; use the Metal Weight Calculator's material picker for those.

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Scenarios

Real-World Examples

3 worked examples

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Plumber quoting a repipe job

7/8 in OD copper pipe, 3/4 in ID, 10 feet

Shape Tube, 0.875 in OD, 0.75 in ID Length 10 ft

A 7/8 in OD copper pipe with a 3/4 in ID has a ring cross-section area of (π/4) × (0.875² − 0.75²) ≈ 0.160 in². Over 10 feet (120 in), that's about 19.1 in³ of copper — roughly 6.2 lb (2.8 kg) at copper's 0.323 lb/in³ density. A thinner wall (larger ID for the same OD) would reduce the weight without changing the outer size.

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Roofer estimating flashing stock

36 in × 96 in copper sheet, 1/16 inch thick

Shape Sheet, 36 in wide, 0.0625 in thick Length 96 in

A 36 in × 96 in copper sheet, 1/16 inch thick, has a cross-section area (width × thickness) of 2.25 in². Multiplied by the 96 in length, that's 216 in³ of copper — about 69.8 lb (31.6 kg). Thickness matters most here: stepping up to 1/8 inch would roughly double the weight to about 139.5 lb.

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Electrician sizing a grounding rod

1/2 in round copper rod, 8 feet

Shape Round bar/rod, 0.5 in diameter Length 8 ft

A 1/2-inch-diameter copper rod has a cross-section area of about 0.196 in². Over 8 feet (96 inches), that's roughly 18.8 in³ of copper — about 6.1 lb (2.8 kg). Doubling the diameter to 1 inch would roughly quadruple the weight, since area scales with the square of diameter.

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Deep Dive

Understanding the Copper Weight Calculator

3 chapters · 3 min read

Knowing the weight of a piece of copper stock — before you cut it, ship it, or price it — matters for shipping quotes, wiring and plumbing jobs, and material cost. This calculator reduces any bar, rod, sheet, or tube to a cross-section area times a length, then multiplies by copper's density to get weight.

How the calculation works

Every copper shape this calculator supports reduces to the same underlying formula: weight = cross-section area × length × density × quantity. The cross-section area depends on the shape — a circle for round bar/rod, a rectangle for rectangular bar and for the width-by-thickness face of sheet, and a ring (outer circle minus inner circle) for tube. Once you have that area, multiplying by the piece's length gives volume, and multiplying volume by copper's density (0.323 lb/in³, or 8.94 g/cm³) gives weight. This is a single fixed density — unlike alloys such as brass or bronze, pure copper doesn't vary much by grade.

Nominal vs. actual dimensions

This calculator uses whatever dimensions you enter, treating them as the actual size of the stock. Mill-produced copper bar, sheet, and tube can run slightly over or under a nominal size — copper pipe, in particular, is sold by nominal size but its actual outer and inner diameters follow published type M/L/K wall-thickness tables. For a rough estimate or shipping-weight budget, nominal dimensions are close enough. For a precise cut list or a quote you're standing behind, check the actual stock dimensions or a supplier's certified weight per foot.

Copper vs. other metals, and why weight matters

Copper is one of the heavier common metals — denser than steel (about 0.284 lb/in³) and roughly 3.3 times denser than aluminum (about 0.0975 lb/in³). That extra weight is one reason copper wiring and plumbing feel substantial in hand, and why shipping and handling costs for copper stock run higher than for the same size in aluminum. This calculator gives physical weight only; it does not include a live scrap or spot price, since copper commodity prices change daily. Multiply the weight this tool gives you by a current scrap-yard quote or metals exchange rate to estimate value.

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Questions

Frequently Asked Questions

6 questions

What is the density of copper?+

Copper's standard engineering reference density is 0.323 lb per cubic inch. This calculator uses that figure for every shape — round, rectangular, sheet, and tube.

What is copper's density in metric units?+

Copper is 8.94 g per cubic centimeter, equivalent to 8,940 kg per cubic meter. Toggle the unit buttons to enter dimensions in millimeters — the calculator converts automatically.

How is the weight of a copper pipe calculated?+

A pipe or tube's cross-section is a ring, so its area is the outer circle's area minus the inner circle's area: A = (π/4) × (OD² − ID²). Multiply that ring area by the pipe's length and copper's density to get weight.

Is copper the heaviest common metal?+

Copper is denser than steel (about 0.284 lb/in³) and far denser than aluminum (about 0.0975 lb/in³), but lead and some tool steels are still heavier. Among metals commonly used in wiring and plumbing, copper is one of the heaviest.

Does this calculator include scrap price?+

No. This tool only computes physical weight. Copper scrap prices change daily — check a current scrap-yard quote or metals exchange rate separately, then multiply by the weight this calculator gives you.

Does this calculator use pounds or kilograms?+

Both. The main result displays in pounds with the kilogram equivalent shown alongside it, so you can read whichever unit your supplier or spec sheet uses.

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