This MS round pipe weight chart covers every circular hollow section (CHS) from 25 NB to 200 NB (33.7 mm to 219.1 mm OD), in wall thicknesses from 1.6 mm to 8 mm. For each size you get the weight per metre, the weight of a standard 6 m length and how many pieces make one tonne. Weights are calculated with the IS:1161 formula for structural steel tubes.
Search by NB, inch size or OD, or use the calculator below for any diameter and length.
MS Round Pipe Weight Chart (kg/m, IS:1161)
| Size (NB · inch · OD mm) | Thickness (mm) | Weight (kg/m) | Weight per 6 m length (kg) | Pieces of 6 m per tonne | Tubora supply |
|---|---|---|---|---|---|
| 25 NB (1″) · 33.7 OD | 1.6 | 1.27 | 7.60 | 131 | Regular |
| 25 NB (1″) · 33.7 OD | 2.0 | 1.56 | 9.38 | 106 | Regular |
| 25 NB (1″) · 33.7 OD | 2.8 | 2.13 | 12.80 | 78 | Regular |
| 25 NB (1″) · 33.7 OD | 3.0 | 2.27 | 13.63 | 73 | Regular |
| 25 NB (1″) · 33.7 OD | 3.5 | 2.61 | 15.64 | 63 | Regular |
| 25 NB (1″) · 33.7 OD | 4.0 | 2.93 | 17.58 | 56 | Regular |
| 25 NB (1″) · 33.7 OD | 5.0 | 3.54 | 21.23 | 47 | Regular |
| 25 NB (1″) · 33.7 OD | 6.0 | 4.10 | 24.59 | 40 | On request |
| 25 NB (1″) · 33.7 OD | 7.0 | 4.61 | 27.65 | 36 | On request |
| 25 NB (1″) · 33.7 OD | 8.0 | 5.07 | 30.42 | 32 | On request |
| 32 NB (1¼”) · 42.4 OD | 1.6 | 1.61 | 9.66 | 103 | Regular |
| 32 NB (1¼”) · 42.4 OD | 2.0 | 1.99 | 11.96 | 83 | Regular |
| 32 NB (1¼”) · 42.4 OD | 2.8 | 2.73 | 16.41 | 60 | Regular |
| 32 NB (1¼”) · 42.4 OD | 3.0 | 2.91 | 17.49 | 57 | Regular |
| 32 NB (1¼”) · 42.4 OD | 3.5 | 3.36 | 20.14 | 49 | Regular |
| 32 NB (1¼”) · 42.4 OD | 4.0 | 3.79 | 22.73 | 44 | Regular |
| 32 NB (1¼”) · 42.4 OD | 5.0 | 4.61 | 27.67 | 36 | Regular |
| 32 NB (1¼”) · 42.4 OD | 6.0 | 5.39 | 32.31 | 30 | On request |
| 32 NB (1¼”) · 42.4 OD | 7.0 | 6.11 | 36.66 | 27 | On request |
| 32 NB (1¼”) · 42.4 OD | 8.0 | 6.79 | 40.72 | 24 | On request |
| 40 NB (1½”) · 48.3 OD | 1.6 | 1.84 | 11.06 | 90 | Regular |
| 40 NB (1½”) · 48.3 OD | 2.0 | 2.28 | 13.70 | 72 | Regular |
| 40 NB (1½”) · 48.3 OD | 2.8 | 3.14 | 18.85 | 53 | Regular |
| 40 NB (1½”) · 48.3 OD | 3.0 | 3.35 | 20.11 | 49 | Regular |
| 40 NB (1½”) · 48.3 OD | 3.5 | 3.87 | 23.20 | 43 | Regular |
| 40 NB (1½”) · 48.3 OD | 4.0 | 4.37 | 26.22 | 38 | Regular |
| 40 NB (1½”) · 48.3 OD | 5.0 | 5.34 | 32.03 | 31 | Regular |
| 40 NB (1½”) · 48.3 OD | 6.0 | 6.26 | 37.55 | 26 | Regular |
| 40 NB (1½”) · 48.3 OD | 7.0 | 7.13 | 42.78 | 23 | Regular |
| 40 NB (1½”) · 48.3 OD | 8.0 | 7.95 | 47.70 | 20 | On request |
| 50 NB (2″) · 60.3 OD | 1.6 | 2.32 | 13.90 | 71 | Regular |
| 50 NB (2″) · 60.3 OD | 2.0 | 2.88 | 17.25 | 57 | Regular |
| 50 NB (2″) · 60.3 OD | 2.8 | 3.97 | 23.82 | 41 | Regular |
| 50 NB (2″) · 60.3 OD | 3.0 | 4.24 | 25.43 | 39 | Regular |
| 50 NB (2″) · 60.3 OD | 3.5 | 4.90 | 29.41 | 33 | Regular |
| 50 NB (2″) · 60.3 OD | 4.0 | 5.55 | 33.32 | 30 | Regular |
| 50 NB (2″) · 60.3 OD | 5.0 | 6.82 | 40.91 | 24 | Regular |
| 50 NB (2″) · 60.3 OD | 6.0 | 8.03 | 48.21 | 20 | Regular |
| 50 NB (2″) · 60.3 OD | 7.0 | 9.20 | 55.20 | 18 | Regular |
| 50 NB (2″) · 60.3 OD | 8.0 | 10.32 | 61.91 | 16 | On request |
| 65 NB (2½”) · 76.1 OD | 1.6 | 2.94 | 17.64 | 56 | Regular |
| 65 NB (2½”) · 76.1 OD | 2.0 | 3.65 | 21.93 | 45 | Regular |
| 65 NB (2½”) · 76.1 OD | 2.8 | 5.06 | 30.37 | 32 | Regular |
| 65 NB (2½”) · 76.1 OD | 3.0 | 5.41 | 32.45 | 30 | Regular |
| 65 NB (2½”) · 76.1 OD | 3.5 | 6.27 | 37.60 | 26 | Regular |
| 65 NB (2½”) · 76.1 OD | 4.0 | 7.11 | 42.67 | 23 | Regular |
| 65 NB (2½”) · 76.1 OD | 5.0 | 8.77 | 52.60 | 19 | Regular |
| 65 NB (2½”) · 76.1 OD | 6.0 | 10.37 | 62.23 | 16 | Regular |
| 65 NB (2½”) · 76.1 OD | 7.0 | 11.93 | 71.57 | 13 | Regular |
| 65 NB (2½”) · 76.1 OD | 8.0 | 13.43 | 80.61 | 12 | On request |
| 80 NB (3″) · 88.9 OD | 1.6 | 3.44 | 20.67 | 48 | Regular |
| 80 NB (3″) · 88.9 OD | 2.0 | 4.29 | 25.72 | 38 | Regular |
| 80 NB (3″) · 88.9 OD | 2.8 | 5.95 | 35.67 | 28 | Regular |
| 80 NB (3″) · 88.9 OD | 3.0 | 6.35 | 38.13 | 26 | Regular |
| 80 NB (3″) · 88.9 OD | 3.5 | 7.37 | 44.23 | 22 | Regular |
| 80 NB (3″) · 88.9 OD | 4.0 | 8.37 | 50.25 | 19 | Regular |
| 80 NB (3″) · 88.9 OD | 5.0 | 10.34 | 62.07 | 16 | Regular |
| 80 NB (3″) · 88.9 OD | 6.0 | 12.27 | 73.60 | 13 | Regular |
| 80 NB (3″) · 88.9 OD | 7.0 | 14.14 | 84.83 | 11 | Regular |
| 80 NB (3″) · 88.9 OD | 8.0 | 15.96 | 95.76 | 10 | On request |
| 90 NB (3½”) · 101.6 OD | 1.6 | 3.95 | 23.67 | 42 | On request |
| 90 NB (3½”) · 101.6 OD | 2.0 | 4.91 | 29.47 | 33 | Regular |
| 90 NB (3½”) · 101.6 OD | 2.8 | 6.82 | 40.93 | 24 | Regular |
| 90 NB (3½”) · 101.6 OD | 3.0 | 7.29 | 43.77 | 22 | Regular |
| 90 NB (3½”) · 101.6 OD | 3.5 | 8.47 | 50.80 | 19 | Regular |
| 90 NB (3½”) · 101.6 OD | 4.0 | 9.63 | 57.76 | 17 | Regular |
| 90 NB (3½”) · 101.6 OD | 5.0 | 11.91 | 71.46 | 13 | Regular |
| 90 NB (3½”) · 101.6 OD | 6.0 | 14.14 | 84.87 | 11 | Regular |
| 90 NB (3½”) · 101.6 OD | 7.0 | 16.33 | 97.98 | 10 | Regular |
| 90 NB (3½”) · 101.6 OD | 8.0 | 18.47 | 110.79 | 9 | Regular |
| 100 NB (4″) · 114.3 OD | 1.6 | 4.45 | 26.68 | 37 | On request |
| 100 NB (4″) · 114.3 OD | 2.0 | 5.54 | 33.23 | 30 | Regular |
| 100 NB (4″) · 114.3 OD | 2.8 | 7.70 | 46.19 | 21 | Regular |
| 100 NB (4″) · 114.3 OD | 3.0 | 8.23 | 49.40 | 20 | Regular |
| 100 NB (4″) · 114.3 OD | 3.5 | 9.56 | 57.38 | 17 | Regular |
| 100 NB (4″) · 114.3 OD | 4.0 | 10.88 | 65.28 | 15 | Regular |
| 100 NB (4″) · 114.3 OD | 5.0 | 13.48 | 80.86 | 12 | Regular |
| 100 NB (4″) · 114.3 OD | 6.0 | 16.02 | 96.14 | 10 | Regular |
| 100 NB (4″) · 114.3 OD | 7.0 | 18.52 | 111.13 | 8 | Regular |
| 100 NB (4″) · 114.3 OD | 8.0 | 20.97 | 125.83 | 7 | Regular |
| 110 NB (4¼”) · 127.0 OD | 1.6 | 4.95 | 29.69 | 33 | On request |
| 110 NB (4¼”) · 127.0 OD | 2.0 | 6.17 | 36.99 | 27 | Regular |
| 110 NB (4¼”) · 127.0 OD | 2.8 | 8.58 | 51.45 | 19 | Regular |
| 110 NB (4¼”) · 127.0 OD | 3.0 | 9.17 | 55.04 | 18 | Regular |
| 110 NB (4¼”) · 127.0 OD | 3.5 | 10.66 | 63.96 | 15 | Regular |
| 110 NB (4¼”) · 127.0 OD | 4.0 | 12.13 | 72.80 | 13 | Regular |
| 110 NB (4¼”) · 127.0 OD | 5.0 | 15.04 | 90.26 | 11 | Regular |
| 110 NB (4¼”) · 127.0 OD | 6.0 | 17.90 | 107.42 | 9 | Regular |
| 110 NB (4¼”) · 127.0 OD | 7.0 | 20.71 | 124.29 | 8 | Regular |
| 110 NB (4¼”) · 127.0 OD | 8.0 | 23.48 | 140.86 | 7 | Regular |
| 125 NB (5″) · 139.7 OD | 1.6 | 5.45 | 32.69 | 30 | On request |
| 125 NB (5″) · 139.7 OD | 2.0 | 6.79 | 40.75 | 24 | On request |
| 125 NB (5″) · 139.7 OD | 2.8 | 9.45 | 56.72 | 17 | Regular |
| 125 NB (5″) · 139.7 OD | 3.0 | 10.11 | 60.68 | 16 | Regular |
| 125 NB (5″) · 139.7 OD | 3.5 | 11.76 | 70.53 | 14 | Regular |
| 125 NB (5″) · 139.7 OD | 4.0 | 13.39 | 80.31 | 12 | Regular |
| 125 NB (5″) · 139.7 OD | 5.0 | 16.61 | 99.65 | 10 | Regular |
| 125 NB (5″) · 139.7 OD | 6.0 | 19.78 | 118.69 | 8 | Regular |
| 125 NB (5″) · 139.7 OD | 7.0 | 22.91 | 137.44 | 7 | Regular |
| 125 NB (5″) · 139.7 OD | 8.0 | 25.98 | 155.89 | 6 | Regular |
| 150 NB (6″) · 168.3 OD | 1.6 | 6.58 | 39.46 | 25 | On request |
| 150 NB (6″) · 168.3 OD | 2.0 | 8.20 | 49.21 | 20 | On request |
| 150 NB (6″) · 168.3 OD | 2.8 | 11.43 | 68.56 | 14 | Regular |
| 150 NB (6″) · 168.3 OD | 3.0 | 12.23 | 73.37 | 13 | Regular |
| 150 NB (6″) · 168.3 OD | 3.5 | 14.22 | 85.34 | 11 | Regular |
| 150 NB (6″) · 168.3 OD | 4.0 | 16.21 | 97.24 | 10 | Regular |
| 150 NB (6″) · 168.3 OD | 5.0 | 20.13 | 120.81 | 8 | Regular |
| 150 NB (6″) · 168.3 OD | 6.0 | 24.01 | 144.08 | 6 | Regular |
| 150 NB (6″) · 168.3 OD | 7.0 | 27.84 | 167.06 | 5 | Regular |
| 150 NB (6″) · 168.3 OD | 8.0 | 31.62 | 189.74 | 5 | Regular |
| 175 NB (7″) · 193.7 OD | 1.6 | 7.58 | 45.48 | 21 | On request |
| 175 NB (7″) · 193.7 OD | 2.0 | 9.45 | 56.73 | 17 | On request |
| 175 NB (7″) · 193.7 OD | 2.8 | 13.18 | 79.09 | 12 | Regular |
| 175 NB (7″) · 193.7 OD | 3.0 | 14.11 | 84.65 | 11 | Regular |
| 175 NB (7″) · 193.7 OD | 3.5 | 16.42 | 98.50 | 10 | Regular |
| 175 NB (7″) · 193.7 OD | 4.0 | 18.71 | 112.27 | 8 | Regular |
| 175 NB (7″) · 193.7 OD | 5.0 | 23.27 | 139.60 | 7 | Regular |
| 175 NB (7″) · 193.7 OD | 6.0 | 27.77 | 166.63 | 6 | Regular |
| 175 NB (7″) · 193.7 OD | 7.0 | 32.23 | 193.37 | 5 | Regular |
| 175 NB (7″) · 193.7 OD | 8.0 | 36.63 | 219.81 | 4 | Regular |
| 200 NB (8″) · 219.1 OD | 1.6 | 8.58 | 51.49 | 19 | On request |
| 200 NB (8″) · 219.1 OD | 2.0 | 10.71 | 64.24 | 15 | On request |
| 200 NB (8″) · 219.1 OD | 2.8 | 14.94 | 89.61 | 11 | Regular |
| 200 NB (8″) · 219.1 OD | 3.0 | 15.99 | 95.92 | 10 | Regular |
| 200 NB (8″) · 219.1 OD | 3.5 | 18.61 | 111.65 | 8 | Regular |
| 200 NB (8″) · 219.1 OD | 4.0 | 21.22 | 127.30 | 7 | Regular |
| 200 NB (8″) · 219.1 OD | 5.0 | 26.40 | 158.39 | 6 | Regular |
| 200 NB (8″) · 219.1 OD | 6.0 | 31.53 | 189.18 | 5 | Regular |
| 200 NB (8″) · 219.1 OD | 7.0 | 36.61 | 219.68 | 4 | Regular |
| 200 NB (8″) · 219.1 OD | 8.0 | 41.65 | 249.87 | 4 | Regular |
Theoretical weights using W = 0.02466 × t × (D − t). “Regular” sizes are in standard production at Tubora; “On request” sizes can be rolled against an order. Tolerance as per IS:1161: thickness ±5%, weight on individual length ±5%, OD up to 48.3 mm +0.4/−0.8 mm, over 48.3 mm ±1% (min ±0.5 mm).
Round Pipe Weight Calculator
Enter the outside diameter, wall thickness, length and number of pieces to get the weight per metre, per piece and in total.
Theoretical weight at 7.85 g/cm³. Actual weight varies within the tolerance of IS:1161.
Round Pipe Weight Formula (IS:1161)
Weight (kg/m) = 0.02466 × t × (D − t)
- D = outside diameter in mm
- t = wall thickness in mm
- 0.02466 = π × 7.85 / 1000, the constant for steel
Worked example, 50 NB (60.3 mm OD) × 3.0 mm: 0.02466 × 3.0 × (60.3 − 3.0) = 0.02466 × 3.0 × 57.3 = 4.24 kg/m, or 25.4 kg for a 6 m length.
NB, Inch and OD Sizes Explained
Round pipes are named by nominal bore (NB) or inch size, but weight depends on the actual outside diameter. The common structural sizes are 25 NB = 1″ = 33.7 mm, 32 NB = 1¼” = 42.4 mm, 40 NB = 1½” = 48.3 mm, 50 NB = 2″ = 60.3 mm, 65 NB = 2½” = 76.1 mm, 80 NB = 3″ = 88.9 mm, 100 NB = 4″ = 114.3 mm, 150 NB = 6″ = 168.3 mm and 200 NB = 8″ = 219.1 mm. The 48.3 mm OD (40 NB) tube is the standard scaffolding size.
For flat-faced members, see the square pipe weight chart and the rectangular pipe weight chart.
Frequently Asked Questions
How do you calculate the weight of an MS round pipe?
Use the IS:1161 formula: weight (kg/m) = 0.02466 × t × (D − t), where D is the outside diameter and t the wall thickness, both in mm. Example: 48.3 mm OD × 3.2 mm works out to 3.56 kg/m.
What is the weight of a 40 NB (1½ inch) MS pipe?
A 40 NB pipe has an outside diameter of 48.3 mm. It weighs 2.28 kg/m in 2.0 mm, 3.35 kg/m in 3.0 mm and 4.37 kg/m in 4.0 mm wall. A 6 m length in 3.0 mm weighs 20.1 kg.
What is the weight of a 50 NB (2 inch) MS pipe?
A 50 NB pipe has an OD of 60.3 mm. It weighs 2.88 kg/m in 2.0 mm, 4.24 kg/m in 3.0 mm and 5.55 kg/m in 4.0 mm wall.
What is the difference between NB and OD?
NB (nominal bore) is a size name, not a measurement. The outside diameter (OD) is fixed for each NB size, for example 25 NB = 33.7 mm OD and 50 NB = 60.3 mm OD, while the bore changes with wall thickness. Always calculate weight from the OD.
Which standard covers MS round pipes for structural use?
IS:1161 covers steel tubes for structural purposes. IS:1239 covers tubes for water, gas and steam. Tubora CHS is made to IS:1161.
Why does actual weight differ from the chart?
The chart shows theoretical weight. IS:1161 allows thickness and weight on an individual length within about ±5% for these sizes, so mill weight can vary slightly from the table.
Need circular hollow sections? Get a quote from the manufacturer.
Tubora Pipes is made by Singhaniya Steel and Power (P) Limited at our ERW plant in Janjgir-Champa, Chhattisgarh, and supplied through dealers across India. Tell us the size, thickness and quantity and our team will confirm price and dispatch.