Pipe weight calculator for MS and GI pipes
This pipe weight calculator gives the weight per metre and the total weight of steel pipes. Choose an Indian MS or GI pipe by nominal bore and class — light, medium or heavy — and it reads the nominal mass straight from the IS 1239 (Part 1) tables, plain end or screwed and socketed. For American schedule pipe it calculates Sch 40 and Sch 80 weights from ASME B36.10M, and for anything else — a round tube, a square or rectangular hollow section, stainless or aluminium — it works the weight out from the dimensions.
Plumbers, fabricators, purchase teams and site engineers use it to check a delivery, estimate scaffolding or railing steel, or answer the everyday question of GI pipe weight per mtr. The MS pipe weight chart under the calculator lists every IS 1239 size with OD, thickness and kg/m for all three classes.
It runs in your browser and updates as you type. Table values are nominal; standards allow pipes to vary, so billing is normally on weighed weight.
How to use the Pipe Weight Calculator (MS & GI)
- Pick IS 1239 MS / GI for Indian pipe, Sch 40 / 80 for ASME schedule pipe, or Any tube for other round, square or rectangular tubes.
- For IS 1239 choose the class and nominal bore, and whether the pipe is plain end or screwed and socketed. For schedule pipe choose the NPS and Sch 40 or 80.
- For other tubes choose round, square or rectangular, the material, and type the outside size and wall thickness. Square and rectangular sections can use IS 4923 rounded corners or sharp corners.
- Enter the length of each pipe and how many pipes; add a price per kg for a cost.
- Read kg per metre, lb per foot and the total, then copy the summary or download the chart as CSV.
Pipe Weight Calculator (MS & GI) features
IS 1239 tables built in
Light, medium and heavy masses for 6–150 NB, plain end and screwed and socketed, as printed in the standard.
Black or GI — same weight
IS 1239 states that its thickness and mass apply to both black and galvanized tubes, so GI pipe weight is read from the same table.
Schedule 40 and 80
NPS ⅛ to 12 in from ASME B36.10M wall thicknesses, in kg/m and lb/ft.
Any hollow section
Round tubes, SHS and RHS with IS 4923 corner radii, in steel, stainless, aluminium, copper or a density you enter.
Shared maths
Section areas come from the same engine as the steel weight calculator, so the two pages always agree.
Pipe weight formula
For a round steel pipe, weight in kg per metre = (OD − t) × t × 0.02466, with the outside diameter OD and wall thickness t in mm. It is π × (OD − t) × t × 7,850 ÷ 10⁶, the area of the steel ring times the density of steel; ASME B36.10M writes the constant as 0.0246615.
Worked example: a 25 NB medium class pipe has an OD between 33.3 and 34.2 mm (mean 33.75) and a 3.2 mm wall. (33.75 − 3.2) × 3.2 × 0.02466 = 2.41 kg/m — exactly the IS 1239 table value — so a 6 m length weighs 14.5 kg and ten lengths 144.6 kg.
Square and rectangular hollow sections: area = 2t(B + D) − 4t² with sharp corners. IS 4923:1997 (Annex A) takes the outer corner radius as 2t and the inner as t, which removes (4 − π)(4t² − t²) from the area: a 40 × 40 × 3.2 mm SHS comes to 4.45 cm², or 3.49 kg/m.
GI pipe weight chart, medium class (IS 1239)
| Nominal bore | Wall | Plain end kg/m | Screwed & socketed kg/m | kg per 6 m |
|---|---|---|---|---|
| 15 NB (½ in) | 2.6 mm | 1.21 | 1.22 | 7.26 |
| 20 NB (¾ in) | 2.6 mm | 1.56 | 1.57 | 9.36 |
| 25 NB (1 in) | 3.2 mm | 2.41 | 2.43 | 14.46 |
| 32 NB (1¼ in) | 3.2 mm | 3.10 | 3.13 | 18.60 |
| 40 NB (1½ in) | 3.2 mm | 3.56 | 3.60 | 21.36 |
| 50 NB (2 in) | 3.6 mm | 5.03 | 5.10 | 30.18 |
| 80 NB (3 in) | 4.0 mm | 8.36 | 8.53 | 50.16 |
| 100 NB (4 in) | 4.5 mm | 12.2 | 12.5 | 73.2 |
Tolerances, lengths and colour bands
- IS 1239 (Part 1):2004 allows a single tube to weigh +10 / −8% of nominal for light tubes and ±10% for medium and heavy; on a 10-tonne lot the limits tighten to +7.5 / −5% and ±7.5%.
- Random lengths are 4 to 7 m; 6 m is the most common stock length. Light, medium and heavy tubes are marked with yellow, blue and red colour bands.
- Light class stops at 100 NB in the standard; 125 and 150 NB are medium or heavy only.
- For plates and sheets use the sheet metal weight calculator; for TMT bars, rebar, angles and flats use the steel weight calculator. Tables checked against the BIS text on 19 October 2026.
Pipe Weight Calculator (MS & GI) FAQ
What is the weight of a 1 inch GI pipe per metre?
A 25 NB (1 in) GI pipe weighs 1.98 kg/m in light class, 2.41 kg/m in medium and 2.93 kg/m in heavy class (plain end) under IS 1239. A 6 m medium length is about 14.5 kg.
How do I calculate MS pipe weight?
Use (OD − thickness) × thickness × 0.02466 for kg per metre, with both in mm, then multiply by the length. This pipe weight calculator does that for any tube and reads standard sizes from the IS 1239 and ASME tables.
Is GI pipe heavier than MS pipe?
The zinc adds a little, but IS 1239 specifies the same nominal mass for black and galvanized tubes, so the GI pipe weight chart and the MS pipe weight chart are the same table.
What is the difference between light, medium and heavy class pipe?
Wall thickness. A 50 NB pipe is 2.9 mm thick in light class, 3.6 mm in medium and 4.5 mm in heavy, weighing 4.08, 5.03 and 6.19 kg/m. Medium and heavy are used for pressure water, gas and steam lines.
How much does 2 inch schedule 40 pipe weigh?
NPS 2 Sch 40 (60.3 mm OD, 3.91 mm wall) weighs 5.44 kg/m, or about 3.66 lb/ft. Sch 80 (5.54 mm wall) weighs 7.48 kg/m.
Why does screwed and socketed pipe weigh more?
The figure includes the socket supplied with each length, spread over the length, less the steel cut away by the thread. The difference is about 1–3%.