Weight of MS and GI tube to IS 1239 Part 1, by nominal bore and class.
MS / GI pipe weight calculator
Weight per metre for mild steel and galvanised iron tube to IS 1239 Part 1. Enter a custom size, or read it off the table below.
IS 1239 Part 1 — standard sizes
| Nominal bore | OD (mm) | Light — kg/m | Medium — kg/m | Heavy — kg/m |
|---|---|---|---|---|
| 15 mm | 21.3 | 0.95 | 1.20 | 1.43 |
| 20 mm | 26.9 | 1.40 | 1.56 | 1.87 |
| 25 mm | 33.7 | 1.99 | 2.41 | 2.93 |
| 32 mm | 42.4 | 2.55 | 3.09 | 3.79 |
| 40 mm | 48.3 | 3.25 | 3.56 | 4.37 |
| 50 mm | 60.3 | 4.10 | 5.03 | 6.19 |
| 65 mm | 76.1 | 5.75 | 6.44 | 7.95 |
| 80 mm | 88.9 | 6.76 | 8.37 | 10.05 |
| 100 mm | 114.3 | 9.83 | 12.18 | 14.50 |
| 125 mm | 139.7 | — | 16.13 | 17.88 |
| 150 mm | 165.1 | — | 19.17 | 21.27 |
Calculated as (OD − t) × t × 0.02466, for steel at 7850 kg/m³. Nominal weights — actual weight varies with mill tolerance. Confirm against the mill test certificate before quoting freight.
Common questions
How is pipe weight per metre calculated?
(OD − t) × t × 0.02466, for steel at a density of 7850 kg/m³, where OD is outside diameter and t is wall thickness, both in mm. This is the formula the calculator above actually uses.
Is the IS 1239 Part 1 dimension table on this page verified against the standard?
No — it is transcribed and has not yet been checked against a current copy of IS 1239 Part 1. Confirm dimensions against the standard or your mill test certificate before quoting freight on their basis.
Why does the light class have no weight for 125 mm and 150 mm?
IS 1239 Part 1 does not define a light-class wall thickness at those bores — only medium and heavy are manufactured, which is why those cells show a dash rather than a figure.
Does the calculated weight match the actual weight of a delivered pipe?
It is a nominal weight from the standard dimensions, not a measured one — mill tolerance means actual weight varies. Confirm against the mill test certificate before relying on it for freight or billing.