SpecBase

Copper C11000 Round Tube Weight

Mass per metre and per foot for copper c11000 round tube at 8,940 kg/m³ (ASTM B152 / B187 (UNS C11000, ETP)). Every figure is for the section as drawn. A 6 m length of this size weighs 23.8 kg (53.2 lb per 20 ft).

Mass / length
3.960kg/m
2.661 lb/ft
Cross-section
443.0mm²
0.6866 in²
Reference size
50 × 3mm
D, t
Density
8,940kg/m³
0.3230 lb/in³
6 m / 20 ft length
23.8kg
53.2 lb

At the reference dimensions (D = 50 mm, t = 3 mm) this section has a cross-sectional area of 443.0 mm², giving 3.960 kg/m (2.661 lb/ft). Against carbon steel's 7,850 kg/m³ that is +13.9 % — the same section in steel would be 3.477 kg/m.

Calculate your own dimensions → Pipe and hollow sections

Round Tube — formula and derivation

Area of a round tube

A = π/4 · (D² − d²), d = D − 2t

A = π/4 × (D² − d²), where D is the outside diameter, d the inside diameter, and d = D − 2t for wall thickness t

Worked through with the default dimensions:

A = π/4 × (D² − d²)d = 50 − 2 × 3 = 44.0 mmA = 0.785398 × (50² − 44.0²)A = 0.785398 × 564.0A = 443.0 mm²
D
Outside diameter
t
Wall thickness — Must be less than half the outside diameter.

Weight follows from the area with no further geometry: m = A × 10⁻⁶ × ρ, where A is in mm², ρ in kg/m³ and m in kg/m. At 8,940 kg/m³ that is 3.9601 kg/m for the reference size above.

Copper round tube — size series

Copper round tube — mass per unit length (kg/m · lb/ft)
Outside diameter 1.0 1.5 2.0 3.0 4.0 5.0 6.0 8.0
12 mm 0.309 kg/m · 0.208 lb/ft 0.442 kg/m · 0.297 lb/ft 0.562 kg/m · 0.377 lb/ft 0.758 kg/m · 0.510 lb/ft 0.899 kg/m · 0.604 lb/ft 0.983 kg/m · 0.661 lb/ft 1.011 kg/m · 0.679 lb/ft 0.899 kg/m · 0.604 lb/ft
16 mm 0.421 kg/m · 0.283 lb/ft 0.611 kg/m · 0.410 lb/ft 0.786 kg/m · 0.528 lb/ft 1.095 kg/m · 0.736 lb/ft 1.348 kg/m · 0.906 lb/ft 1.545 kg/m · 1.038 lb/ft 1.685 kg/m · 1.132 lb/ft 1.797 kg/m · 1.208 lb/ft
20 mm 0.534 kg/m · 0.359 lb/ft 0.779 kg/m · 0.524 lb/ft 1.011 kg/m · 0.679 lb/ft 1.432 kg/m · 0.963 lb/ft 1.797 kg/m · 1.208 lb/ft 2.106 kg/m · 1.415 lb/ft 2.359 kg/m · 1.585 lb/ft 2.696 kg/m · 1.812 lb/ft
25 mm 0.674 kg/m · 0.453 lb/ft 0.990 kg/m · 0.665 lb/ft 1.292 kg/m · 0.868 lb/ft 1.854 kg/m · 1.246 lb/ft 2.359 kg/m · 1.585 lb/ft 2.809 kg/m · 1.887 lb/ft 3.202 kg/m · 2.152 lb/ft 3.820 kg/m · 2.567 lb/ft
32 mm 0.871 kg/m · 0.585 lb/ft 1.285 kg/m · 0.863 lb/ft 1.685 kg/m · 1.132 lb/ft 2.443 kg/m · 1.642 lb/ft 3.146 kg/m · 2.114 lb/ft 3.792 kg/m · 2.548 lb/ft 4.381 kg/m · 2.944 lb/ft 5.392 kg/m · 3.624 lb/ft
40 mm 1.095 kg/m · 0.736 lb/ft 1.622 kg/m · 1.090 lb/ft 2.135 kg/m · 1.434 lb/ft 3.118 kg/m · 2.095 lb/ft 4.044 kg/m · 2.718 lb/ft 4.915 kg/m · 3.303 lb/ft 5.730 kg/m · 3.850 lb/ft 7.190 kg/m · 4.831 lb/ft
50 mm 1.376 kg/m · 0.925 lb/ft 2.043 kg/m · 1.373 lb/ft 2.696 kg/m · 1.812 lb/ft 3.960 kg/m · 2.661 lb/ft 5.168 kg/m · 3.473 lb/ft 6.319 kg/m · 4.246 lb/ft 7.415 kg/m · 4.982 lb/ft 9.437 kg/m · 6.341 lb/ft
63 mm 1.741 kg/m · 1.170 lb/ft 2.591 kg/m · 1.741 lb/ft 3.426 kg/m · 2.302 lb/ft 5.055 kg/m · 3.397 lb/ft 6.628 kg/m · 4.454 lb/ft 8.145 kg/m · 5.473 lb/ft 9.605 kg/m · 6.455 lb/ft 12.358 kg/m · 8.304 lb/ft
76 mm 2.106 kg/m · 1.415 lb/ft 3.139 kg/m · 2.109 lb/ft 4.157 kg/m · 2.793 lb/ft 6.151 kg/m · 4.133 lb/ft 8.089 kg/m · 5.435 lb/ft 9.970 kg/m · 6.700 lb/ft 11.796 kg/m · 7.927 lb/ft 15.279 kg/m · 10.267 lb/ft
89 mm 2.472 kg/m · 1.661 lb/ft 3.686 kg/m · 2.477 lb/ft 4.887 kg/m · 3.284 lb/ft 7.246 kg/m · 4.869 lb/ft 9.549 kg/m · 6.417 lb/ft 11.796 kg/m · 7.927 lb/ft 13.987 kg/m · 9.399 lb/ft 18.200 kg/m · 12.230 lb/ft
114 mm 3.174 kg/m · 2.133 lb/ft 4.739 kg/m · 3.185 lb/ft 6.291 kg/m · 4.228 lb/ft 9.353 kg/m · 6.285 lb/ft 12.358 kg/m · 8.304 lb/ft 15.307 kg/m · 10.286 lb/ft 18.200 kg/m · 12.230 lb/ft 23.817 kg/m · 16.004 lb/ft
168 mm 4.690 kg/m · 3.152 lb/ft 7.014 kg/m · 4.713 lb/ft 9.324 kg/m · 6.266 lb/ft 13.902 kg/m · 9.342 lb/ft 18.424 kg/m · 12.381 lb/ft 22.890 kg/m · 15.381 lb/ft 27.299 kg/m · 18.344 lb/ft 35.950 kg/m · 24.157 lb/ft

Rows: outside diameter (mm). Columns: wall thickness (mm). Computed for Copper C11000 at 8940 kg/m³.

Round Tube — cross-sectional area (mm²)
Outside diameter 1.0 1.5 2.0 3.0 4.0 5.0 6.0 8.0
12 mm 34.6 49.5 62.8 84.8 100.5 110.0 113.1 100.5
16 mm 47.1 68.3 88.0 122.5 150.8 172.8 188.5 201.1
20 mm 59.7 87.2 113.1 160.2 201.1 235.6 263.9 301.6
25 mm 75.4 110.7 144.5 207.3 263.9 314.2 358.1 427.3
32 mm 97.4 143.7 188.5 273.3 351.9 424.1 490.1 603.2
40 mm 122.5 181.4 238.8 348.7 452.4 549.8 640.9 804.2
50 mm 153.9 228.6 301.6 443.0 578.1 706.9 829.4 1,055.6
63 mm 194.8 289.8 383.3 565.5 741.4 911.1 1,074.4 1,382.3
76 mm 235.6 351.1 465.0 688.0 904.8 1,115.3 1,319.5 1,709.0
89 mm 276.5 412.3 546.6 810.5 1,068.1 1,319.5 1,564.5 2,035.8
114 mm 355.0 530.1 703.7 1,046.2 1,382.3 1,712.2 2,035.8 2,664.1
168 mm 524.6 784.6 1,043.0 1,555.1 2,060.9 2,560.4 3,053.6 4,021.2

Area is a property of the geometry alone, so this table is the same for every material. It is what you enter into a stress calculation; the mass table is what you enter into an order.

How to read this table

Each row is one nominal size. Because the area is computed from your dimensions rather than read from a mill table, a non-standard size is just as accurate — put it into the calculator above rather than interpolating between rows.

The same round tube in every material

Geometry is fixed and only density changes, so this table is the whole material-selection question in one view. Copper C11000 is highlighted. The percentage column is against carbon steel, which is the figure most quotations are built on.

Round Tube at D = 50 mm, t = 3 mm — mass in every material
Material Density kg/m³ lb/in³ Mass / length kg/m lb/ft vs carbon steel
Carbon Steel 7,850 0.2836 3.477 2.337 +0.0 %
Stainless Steel 304 8,000 0.2890 3.544 2.381 +1.9 %
Stainless Steel 316 8,000 0.2890 3.544 2.381 +1.9 %
Stainless Steel 316L 8,000 0.2890 3.544 2.381 +1.9 %
Stainless Steel 430 7,700 0.2782 3.411 2.292 -1.9 %
Aluminum 6061-T6 2,700 0.0975 1.196 0.804 -65.6 %
Aluminum 5052-H32 2,680 0.0968 1.187 0.798 -65.9 %
Aluminum 7075-T6 2,810 0.1015 1.245 0.836 -64.2 %
Copper C11000 8,940 0.3230 3.960 2.661 +13.9 %
Brass C36000 8,500 0.3071 3.765 2.530 +8.3 %
Bronze C93200 8,800 0.3179 3.898 2.619 +12.1 %
Titanium Grade 2 4,510 0.1629 1.998 1.342 -42.5 %
Gray Cast Iron 7,200 0.2601 3.189 2.143 -8.3 %
Lead 11,340 0.4097 5.023 3.375 +44.5 %
Rigid PVC (Type I) 1,400 0.0506 0.620 0.417 -82.2 %
HDPE (PE 100) 960 0.0347 0.425 0.286 -87.8 %

Same geometry throughout, so the only variable is density. Carbon steel is highlighted as the baseline.

A note on using this table for costing: mass is not price. Aluminium is roughly a third of steel's mass here, but per kilogram it costs several times more, so a straight swap rarely saves money — what it buys is reduced load on a structure or a vehicle.

About copper c11000

Electrolytic tough pitch copper, 99.9 % Cu minimum — the electrical conductor standard, and the densest material here after lead at 8,940 kg/m³. That density is the point: high conductivity and high mass travel together in copper, which is why busbar and winding take-offs are always done by mass. It is 13.9 % heavier than carbon steel, so a copper busbar replacing a steel one of the same section gains weight while gaining conductivity.

Density
8,940 kg/m³ = 0.3230 lb/in³ · 1.1389× carbon steel · typical spread ±1 %
Specification
ASTM B152 / B187 (UNS C11000, ETP)
Equivalents
EN CW004A · JIS C1100 · GB T2
Typical uses
Busbar and windings · Plumbing tube · Heat exchangers · Roofing and flashing

About round tube

Hollow sections are the most efficient way to buy stiffness by weight, and the numbers are stark: a 50 mm outside diameter tube with a 3 mm wall has the same area as a 22.6 mm solid bar — about 20 % of the mass — but its second moment of area is roughly 2.4 times larger. The catch is local: a thin wall buckles and dents long before it yields, so tube is chosen for stiffness and stability, never for where impact or crushing is expected.

When ordering

Specified as outside diameter × wall thickness. State the standard (e.g. EN 10219) and whether the tube is welded or seamless.

Download this data

Copper round tube — CSV

Both buttons below read the tables rendered on this page, so the file matches what you are looking at. The full catalogue — all 16 materials across all 10 sections — is on the downloads page.

All materials (CSV · 16 × 10 pages)

Fields are quoted per RFC 4180, with a UTF-8 byte-order mark so Excel reads the mm² and · characters correctly. Blank lines separate the weight matrix from the area matrix.

Frequently asked questions

How much does copper c11000 round tube weigh?

At the reference dimensions (D = 50 mm, t = 3 mm) a copper c11000 round tube of this size weighs 3.960 kg/m, or 2.661 lb/ft. The table above lists the figure for every standard size so you can read your size directly instead of scaling.

How is the weight of round tube calculated?

Weight is cross-sectional area × length × density. For this shape the area is A = π/4 · (D² − d²), d = D − 2t. At the reference dimensions that gives 443.0 mm², and multiplying by copper c11000's density of 8,940 kg/m³ gives 3.960 kg/m. Nothing is looked up in a table — which is why a non-standard size is calculated just as accurately as a standard one.

Why does copper c11000 weigh more or less than steel?

It is heavier than carbon steel for the same section — about 14 % heavier at 8,940 kg/m³. Density is the only variable: the cross-sectional area depends purely on geometry, so a round tube of the same dimensions has the same area in every material and the mass simply scales with density. In this case the ratio is 1.1389× carbon steel.

What is the cross-sectional area of a round tube?

The area depends only on the dimensions, not on the material, so it is identical whichever material you select: at the reference dimensions it is 443.0 mm² (0.6866 in²). That is the number you would enter into a stress or deflection calculation, and it is why changing material on this page never changes the area column.

Does a copper round tube weigh the same as a copper part of a different shape?

No, and the difference is larger than most people expect. At equal nominal size, a square bar is 27.3 % heavier than a round bar, and a hollow section is typically 60–80 % lighter than the solid bar it replaces. Weight follows area, and area changes faster than dimensions do — which is exactly why this needs calculating rather than estimating.

Should I use Copper weight or carbon steel weight for costing?

Use the material you are actually buying. At 8,940 kg/m³ against carbon steel's 7,850 kg/m³, the same round tube differs by 13.9 % in mass. On a per-metre quote that is invisible; on a fabricated tonnage it is the difference between a margin and a loss. This page computes the steel figure as 3.477 kg/m for comparison.

Other materials, same round tube

The same geometry in every material, so the only variable is density.

Other Copper sections

The same density applied to every shape the site covers.

Reference data and tools

Data source and method

Round Tube area from A = π/4 · (D² − d²), d = D − 2t. Mass computed as area × length × density at 8,940 kg/m³ (ASTM B152 / B187 (UNS C11000, ETP)). No weight on this page is copied from a published table — which is why figures can differ in the last significant digit from a mill's chart calculated at a nominal density.

  • Elementary plane geometry. The circle, polygon and hollow-section area formulas.
  • ASTM material specifications for each grade named in the material entry (A36, A240/A276, B209/B211/B221, B152/B16/B505, B265/B348, A48, B29, D1784, D3350).
  • BIPM / NIST definitional constants: international inch = 25.4 mm, foot = 0.3048 m, pound = 0.45359237 kg.

Dataset version 2026.09.1 · dimensions last verified against source 2026-09-21. Found an error? Report it — corrections are issued with a version bump.