How do you calculate the linear weight of a stainless tube?

With W = k × (OD − t) × t, where OD and t are the outer diameter and wall thickness in mm, and k = π × ρ / 1000 derived from the grade's density. This tool applies that formula instantly in your browser.

Why does the weight differ between 304L and 316L at the same dimensions?

Because their density differs: 7.90 g/cm³ for 304L versus 7.98 g/cm³ for 316L. The gap is small — about 1% — but enough to diverge on a large order if the wrong density is used.

Is the displayed weight what I will actually be invoiced?

It is a theoretical weight, without dimensional tolerances. See the Limits section below: the real deviation can reach −5% to +8% on a thin welded tube, depending on the applicable ISO 1127 tolerance class.

Can I calculate the weight of a titanium or cupronickel tube?

Yes: the 26 grades in the selector include titanium grade 2 and both cupronickels, each with its own density. The calculation follows exactly the same formula.

Can I share my calculation with a colleague?

Yes, the calculation's state is encoded in the page URL. Copy the link from your address bar once your values are entered: it reopens the tool with the exact same configuration.

Where do the densities used by this calculator come from?

These densities are the same as those on our grade pages — a tube and its grade page always give the same weight.

TECHNICAL TOOL

Stainless tube weight calculator

Linear weight, lot weight and internal volume of a tube, from DN and schedule or from a hand-entered geometry.

Quick selection — DN + schedule

DN + schedule

Fills OD and wall thickness below. You can still adjust them afterwards.

Geometry and material

Unit

OD (mm)

Wall thickness (mm)

Grade

Length and quantity

Unit length (m)

Quantity

Ø 60,3 × 2,77 mm

SCALE 1:1,6

Result

Linear weight: 3,995 kg/m
Unit weight: 23,971 kg
Lot weight: 24 kg
Inner diameter: 54,76 mm
Metal cross-section: 501 mm²
Internal volume: 2,355 L/m

Ø 60,3 × 2,77 mm

SCALE 1:1,6

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How it works

Linear weight follows W = k × (OD − t) × t, with k = π × ρ / 1000, OD and t in millimetres and ρ the grade's density in g/cm³. Inner diameter is OD − 2t, metal cross-section is π/4 × (OD² − ID²), and internal volume is π/4 × ID² / 1000 litres per metre.

Weight constants by grade

Density and coefficient k for the 26 grades offered by this calculator, if you prefer to run the calculation yourself.

Density and coefficient k by grade — indicative values, to be cross-checked against the material certificate before purchase
Grade	Common designation / ASTM	Family	ρ (g/cm³)	k
Inox 304L	1.4307 / 304L	Austénitiques	7,90	0,024819
Inox 316L	1.4404 / 316L	Austénitiques	7,98	0,025070
Inox 316L à molybdène élevé	1.4435 / 316L	Austénitiques	8,00	0,025133
Inox 316Ti stabilisé titane	1.4571 / 316Ti	Austénitiques	8,00	0,025133
Inox 321 stabilisé titane	1.4541 / 321	Austénitiques	7,90	0,024819
Duplex 2205	1.4462 / 2205	Duplex & super duplex	7,80	0,024504
Super duplex 2507	1.4410 / 2507	Duplex & super duplex	7,80	0,024504
Inox 904L	1.4539 / 904L	Super austénitiques	8,00	0,025133
Super austénitique 254 SMO	1.4547 / 254 SMO	Super austénitiques	8,00	0,025133
Alliage 625	2.4856 / Alloy 625	Alliages nickel	8,44	0,026515
Titane grade 2	3.7035 / Grade 2	Titane	4,51	0,014169
Cupronickel 90/10	CW352H / 90/10	Alliages de cuivre	8,90	0,027960
Cupronickel 70/30	CW354H / 70/30	Alliages de cuivre	8,95	0,028117
310S — réfractaire austénitique 25-20	1.4845 / 310S	Réfractaires	7,90	0,024819
253 MA — réfractaire austénitique au silicium et cérium	1.4835 / 253 MA	Réfractaires	7,80	0,024504
317L — austénitique à haute teneur en molybdène	≈ 1.4438 / TP317L	Austénitiques	8,00	0,025133
347H — austénitique stabilisé au niobium, tenue au fluage	no exact equivalent / TP347H	Nuances H et stabilisées	7,96	0,025007
2101 — duplex lean, faible teneur en nickel	1.4162 / 2101	Duplex & super duplex	7,80	0,024504
2304 — duplex sans molybdène	1.4362 / 2304	Duplex & super duplex	7,80	0,024504
430 — ferritique au chrome, sans nickel	1.4016 / TP430	Ferritiques & martensitiques	7,70	0,024190
444 — ferritique au molybdène, stabilisé	1.4521 / 444 / 18Cr-2Mo	Ferritiques & martensitiques	7,80	0,024504
Alliage 825 — nickel-fer-chrome au molybdène, cuivre et titane	2.4858 / Alloy 825	Alliages nickel	8,14	0,025573
Alliage 600 — nickel-chrome à 72 % de nickel minimum	2.4816 / Alloy 600	Alliages nickel	8,47	0,026609
Alliage 800 — nickel-fer-chrome pour service à chaud	1.4876 / Alloy 800	Alliages nickel	7,94	0,024944
C-276 — nickel-chrome-molybdène au tungstène	2.4819 / C-276	Alliages nickel	8,89	0,027929
Titane grade 7 — titane non allié au palladium	3.7235 / Ti Grade 7	Titane	4,51	0,014169

Limits of this calculation

Frequently asked questions

How do you calculate the linear weight of a stainless tube?: With W = k × (OD − t) × t, where OD and t are the outer diameter and wall thickness in mm, and k = π × ρ / 1000 derived from the grade's density. This tool applies that formula instantly in your browser.
Why does the weight differ between 304L and 316L at the same dimensions?: Because their density differs: 7.90 g/cm³ for 304L versus 7.98 g/cm³ for 316L. The gap is small — about 1% — but enough to diverge on a large order if the wrong density is used.
Is the displayed weight what I will actually be invoiced?: It is a theoretical weight, without dimensional tolerances. See the Limits section below: the real deviation can reach −5% to +8% on a thin welded tube, depending on the applicable ISO 1127 tolerance class.
Can I calculate the weight of a titanium or cupronickel tube?: Yes: the 26 grades in the selector include titanium grade 2 and both cupronickels, each with its own density. The calculation follows exactly the same formula.
Can I share my calculation with a colleague?: Yes, the calculation's state is encoded in the page URL. Copy the link from your address bar once your values are entered: it reopens the tool with the exact same configuration.
Where do the densities used by this calculator come from?: These densities are the same as those on our grade pages — a tube and its grade page always give the same weight.