Pipe Weight Calculator
Calculate theoretical pipe weight per metre, per foot, per length and total shipment weight for carbon steel, stainless steel, alloy steel, duplex, nickel alloy and copper-nickel pipes and tubes.
Pipe & Tube Weight Calculator
Calculate the theoretical weight of round pipes using outside diameter, wall thickness, material density and pipe length.
Calculation Result
Theoretical nominal material weight
Weight (kg/m) = (OD − WT) × WT × π × Density ÷ 1,000,000
Pipe Weight Chart: Sachiya Steel International provides pipe weight reference data for carbon steel, stainless steel and alloy pipes. The calculator above can calculate theoretical weight from outside diameter, wall thickness, material density, length and quantity.
Use the charts when you already know the nominal pipe size and wall thickness. Use the calculator when you need to calculate a custom size, material, length or quantity.
What Is a Pipe Weight Chart?
A pipe weight chart is a reference table showing the theoretical weight of pipe per metre or per foot. Depending on the chart, it may include nominal pipe size, outside diameter, wall thickness, pipe schedule and theoretical weight.
The theoretical weight of a round pipe is primarily determined by:
- Outside diameter (OD): The external diameter of the pipe.
- Wall thickness (WT): The thickness of the pipe wall.
- Material density: The density selected for the material.
- Length: Used to calculate the weight of a complete piece.
- Quantity: Used to calculate the total weight of multiple pieces.
The calculator can be used for seamless pipe, ERW pipe, EFW pipe, LSAW pipe, SSAW pipe, welded pipe, boiler tubes, heat exchanger tubes and other round tubes when the required dimensions and material density are known.
Why Pipe Weight Matters
Pipe weight is important for material purchasing, transportation, storage, handling, fabrication and preliminary load calculations.
- Freight: Shipment weight is required for transport planning.
- Loading: Truck, container and lifting limits depend on cargo weight.
- Pricing: Pipe may be purchased or quoted by kilogram, tonne, metre or piece.
- Structural planning: Theoretical pipe weight can be used for preliminary dead-load calculations.
- Stock calculations: Weight per metre helps estimate inventory weight.
Pipe Weight Formula
The calculator determines pipe weight from the cross-sectional area of the pipe wall multiplied by material density. For a round hollow section:
Weight (kg/m) =
[π ÷ 4 × (OD² − ID²)] × Density ÷ 1,000,000
Because the inside diameter is calculated as OD − 2 × WT, the same formula can be expressed as:
Weight (kg/m) =
[π ÷ 4 × (OD² − (OD − 2 × WT)²)] × Density ÷ 1,000,000
For carbon steel with a density of 7,850 kg/m³, this is commonly approximated as:
Weight (kg/m) ≈ (OD − WT) × WT × 0.02466
OD and WT are in millimetres. The calculator itself uses the cross-sectional area formula rather than relying on the rounded 0.02466 factor.
Converting kg/m to lb/ft
Weight (lb/ft) = Weight (kg/m) × 0.671968975
Therefore, 1 kg/m is approximately 0.67197 lb/ft, and 1 lb/ft is approximately 1.48816 kg/m.
Pipe Weight Examples
Example 1 — 4 inch Schedule 40 carbon steel pipe:
OD = 114.3 mm
WT = 6.02 mm
Density = 7,850 kg/m³
Theoretical weight ≈ 16.08 kg/m.
For a 6 metre piece:
16.08 × 6 ≈ 96.48 kg per piece
Example 2 — 6 inch Schedule 40 carbon steel pipe:
OD = 168.3 mm
WT = 7.11 mm
Density = 7,850 kg/m³
Theoretical weight ≈ 28.26 kg/m.
For a 12 metre piece:
28.26 × 12 ≈ 339.12 kg per piece
These are theoretical values. Actual supplied weight can differ because actual dimensions and material properties are subject to applicable manufacturing tolerances.
How to Use the Pipe Weight Calculator
- Select Pipe & Tube, Round Tube, Square Tube or Rectangular Tube.
- Select Metric or Imperial units.
- Select the product type.
- Select the material.
- Select the applicable grade, if required.
- Enter the required dimensions.
- Enter length per piece.
- Enter the number of pieces.
- Click the calculate button or allow the live calculation to update.
The calculator displays weight per metre, weight per foot, cross-sectional area, weight per piece and total weight.
Carbon Steel Pipe Weight Chart: Schedule 40 & 80
The following values are theoretical carbon steel pipe weights calculated using nominal outside diameter, wall thickness and a density of 7,850 kg/m³.
| NPS (in) |
OD (mm) |
Sch 40 WT (mm) |
Sch 40 (kg/m) |
Sch 40 (lb/ft) |
Sch 80 WT (mm) |
Sch 80 (kg/m) |
Sch 80 (lb/ft) |
|---|---|---|---|---|---|---|---|
| 1/8 | 10.3 | 1.73 | 0.37 | 0.25 | 2.41 | 0.47 | 0.32 |
| 1/4 | 13.7 | 2.24 | 0.63 | 0.42 | 3.02 | 0.80 | 0.54 |
| 3/8 | 17.1 | 2.31 | 0.84 | 0.56 | 3.20 | 1.10 | 0.74 |
| 1/2 | 21.3 | 2.77 | 1.27 | 0.85 | 3.73 | 1.62 | 1.09 |
| 3/4 | 26.7 | 2.87 | 1.69 | 1.14 | 3.91 | 2.20 | 1.48 |
| 1 | 33.4 | 3.38 | 2.50 | 1.68 | 4.55 | 3.24 | 2.18 |
| 1 1/4 | 42.2 | 3.56 | 3.39 | 2.28 | 4.85 | 4.47 | 3.00 |
| 1 1/2 | 48.3 | 3.68 | 4.05 | 2.72 | 5.08 | 5.41 | 3.64 |
| 2 | 60.3 | 3.91 | 5.44 | 3.65 | 5.54 | 7.48 | 5.03 |
| 2 1/2 | 73.0 | 5.16 | 8.63 | 5.80 | 7.01 | 11.41 | 7.67 |
| 3 | 88.9 | 5.49 | 11.29 | 7.59 | 7.62 | 15.27 | 10.26 |
| 3 1/2 | 101.6 | 5.74 | 13.57 | 9.12 | 8.08 | 18.64 | 12.52 |
| 4 | 114.3 | 6.02 | 16.08 | 10.80 | 8.56 | 22.32 | 15.00 |
| 5 | 141.3 | 6.55 | 21.77 | 14.63 | 9.53 | 30.97 | 20.81 |
| 6 | 168.3 | 7.11 | 28.26 | 18.99 | 10.97 | 42.56 | 28.60 |
| 8 | 219.1 | 8.18 | 42.55 | 28.59 | 12.70 | 64.64 | 43.44 |
| 10 | 273.1 | 9.27 | 60.31 | 40.53 | 15.09 | 96.02 | 64.52 |
Schedule designations and wall thicknesses must be checked against the applicable piping standard for the specific product being purchased.
Pipe Weight Chart: Schedule 10, 160 & XXS
Heavier wall pipe has a larger steel cross-sectional area and therefore a higher theoretical weight when the outside diameter and material density remain the same.
| NPS (in) |
OD (mm) |
Sch 10 WT (mm) |
Sch 10 (kg/m) |
Sch 160 WT (mm) |
Sch 160 (kg/m) |
XXS WT (mm) |
XXS (kg/m) |
|---|---|---|---|---|---|---|---|
| 1/2 | 21.3 | 2.11 | 1.00 | 4.78 | 1.95 | 7.47 | 2.55 |
| 3/4 | 26.7 | 2.11 | 1.28 | 5.56 | 2.90 | 7.82 | 3.64 |
| 1 | 33.4 | 2.77 | 2.09 | 6.35 | 4.24 | 9.09 | 5.45 |
| 1 1/4 | 42.2 | 2.77 | 2.69 | 6.35 | 5.61 | 9.70 | 7.77 |
| 1 1/2 | 48.3 | 2.77 | 3.11 | 7.14 | 7.25 | 10.15 | 9.55 |
| 2 | 60.3 | 2.77 | 3.93 | 8.74 | 11.11 | 11.07 | 13.44 |
| 2 1/2 | 73.0 | 3.05 | 5.26 | 9.53 | 14.92 | 14.02 | 20.39 |
| 3 | 88.9 | 3.05 | 6.46 | 11.13 | 21.35 | 15.24 | 27.68 |
| 4 | 114.3 | 3.05 | 8.37 | 13.49 | 33.54 | 17.12 | 41.03 |
| 5 | 141.3 | 3.40 | 11.56 | 15.88 | 49.12 | 19.05 | 57.43 |
| 6 | 168.3 | 3.40 | 13.83 | 18.26 | 67.57 | 21.95 | 79.22 |
| 8 | 219.1 | 3.76 | 19.97 | 23.01 | 111.27 | 22.23 | 107.93 |
| 10 | 273.1 | 4.19 | 27.79 | 28.58 | 172.34 | 25.40 | 155.16 |
Large Diameter Pipe Weight Chart: 12 to 48 Inch
Large diameter pipe is commonly supplied with a range of wall thicknesses. The following reference uses 9.53 mm and 12.70 mm wall thicknesses for the listed sizes.
| NPS (in) |
OD (mm) |
9.53 mm Wall (kg/m) |
9.53 mm Wall (lb/ft) |
12.70 mm Wall (kg/m) |
12.70 mm Wall (lb/ft) |
|---|---|---|---|---|---|
| 12 | 323.9 | 73.88 | 49.65 | 97.47 | 65.50 |
| 14 | 355.6 | 81.33 | 54.65 | 107.40 | 72.17 |
| 16 | 406.4 | 93.27 | 62.68 | 123.31 | 82.86 |
| 18 | 457.2 | 105.21 | 70.70 | 139.22 | 93.55 |
| 20 | 508.0 | 117.15 | 78.72 | 155.13 | 104.24 |
| 24 | 609.6 | 141.03 | 94.77 | 186.95 | 125.62 |
| 30 | 762.0 | 176.85 | 118.84 | 234.68 | 157.70 |
| 36 | 914.4 | 212.67 | 142.91 | 282.41 | 189.77 |
| 42 | 1066.8 | 248.48 | 166.97 | 330.15 | 221.85 |
| 48 | 1219.2 | 284.30 | 191.04 | 377.88 | 253.92 |
Stainless Steel Pipe Weight Chart
Stainless steel pipe weight depends on the actual outside diameter, wall thickness and density of the selected stainless steel grade. The following reference uses a density of 7,930 kg/m³ for Stainless Steel 304.
| NPS (in) |
OD (mm) |
Sch 5S (kg/m) |
Sch 10S (kg/m) |
Sch 40S (kg/m) |
Sch 80S (kg/m) |
|---|---|---|---|---|---|
| 1/8 | 10.3 | 0.21 | 0.28 | 0.37 | 0.47 |
| 1/4 | 13.7 | 0.38 | 0.50 | 0.64 | 0.80 |
| 3/8 | 17.1 | 0.49 | 0.64 | 0.85 | 1.11 |
| 1/2 | 21.3 | 0.81 | 1.01 | 1.28 | 1.63 |
| 3/4 | 26.7 | 1.03 | 1.29 | 1.70 | 2.22 |
| 1 | 33.4 | 1.31 | 2.11 | 2.53 | 3.27 |
| 1 1/4 | 42.2 | 1.67 | 2.72 | 3.43 | 4.51 |
| 1 1/2 | 48.3 | 1.92 | 3.14 | 4.09 | 5.47 |
| 2 | 60.3 | 2.41 | 3.97 | 5.49 | 7.56 |
| 2 1/2 | 73.0 | 3.73 | 5.32 | 8.72 | 11.52 |
| 3 | 88.9 | 4.56 | 6.52 | 11.41 | 15.43 |
| 3 1/2 | 101.6 | 5.23 | 7.49 | 13.71 | 18.83 |
| 4 | 114.3 | 5.90 | 8.45 | 16.24 | 22.55 |
| 5 | 141.3 | 9.56 | 11.68 | 21.99 | 31.28 |
| 6 | 168.3 | 11.42 | 13.97 | 28.55 | 43.00 |
| 8 | 219.1 | 14.93 | 20.17 | 42.98 | 65.30 |
| 10 | 273.1 | 22.84 | 28.07 | 60.93 | 82.39 |
| 12 | 323.9 | 31.56 | 36.36 | 74.64 | 98.46 |
Pipe Weight by Material
When outside diameter and wall thickness remain unchanged, changing the material density changes the theoretical weight.
| Material | Density (kg/m³) |
Approx. Factor vs Carbon Steel |
|---|---|---|
| Duplex / Super Duplex Steel | 7,800 | 0.994x |
| Carbon Steel | 7,850 | 1.000x |
| Alloy Steel | 7,900 | 1.006x |
| Stainless Steel 304 / 304L | 7,930 | 1.010x |
| Stainless Steel 316 / 316L | 7,980 | 1.017x |
| Inconel 625 | 8,440 | 1.075x |
| Copper Nickel 90/10 | 8,900 | 1.134x |
| Copper Nickel 70/30 | 8,950 | 1.140x |
Density values can vary by grade and specification. For detailed purchasing calculations, use the density specified by the applicable material standard or material documentation.
Seamless, ERW, LSAW & SSAW Pipe Weight
Manufacturing method does not by itself determine theoretical pipe weight. If two pipes have identical outside diameter, wall thickness, length and material density, their calculated theoretical weight is the same regardless of whether the pipe is seamless, ERW, LSAW or SSAW.
| Pipe Type | General Manufacturing Method | Common Applications / Uses |
|---|---|---|
| Seamless | Produced from a solid billet without a longitudinal welded seam. | Process piping, pressure service and general industrial applications. |
| ERW | Produced from strip or coil with an electric resistance welded seam. | General piping, structural and industrial applications. |
| LSAW | Produced from plate with a longitudinal submerged arc weld. | Large-diameter line pipe and industrial applications. |
| SSAW | Produced from strip or coil using a spiral submerged arc weld. | Large-diameter transmission, piling and industrial applications. |
Pipe Schedule & Wall Thickness
Pipe schedule is a designation associated with pipe wall thickness. For a given nominal pipe size, the outside diameter generally remains established while different schedules can have different wall thicknesses.
- A thicker wall normally results in greater theoretical weight.
- Schedule 40 does not represent one universal wall thickness for every NPS size.
- Schedule 80 generally has a thicker wall than Schedule 40 at the same nominal size.
- Stainless steel pipe uses S schedule designations in applicable standards.
- STD, XS and XXS are traditional weight-class designations that are still encountered in pipe specifications.
Weight of a Full Pipe Length
Once the weight per metre is known, multiply it by the length of one piece. Then multiply the result by the number of pieces.
Weight per piece = Weight per metre × Length in metres
Total weight = Weight per piece × Number of pieces
For example, using 16.08 kg/m for a 4 inch Schedule 40 carbon steel pipe:
16.08 × 6 m ≈ 96.48 kg per piece
Theoretical Weight vs Actual Weight
The calculator provides theoretical weight based on the dimensions and density entered by the user. Actual supplied pipe weight may differ because actual dimensions, material density and manufacturing conditions are subject to permitted tolerances.
Coatings, lining, galvanizing, threads, bevels, end preparation, fittings, caps and other additional components can also affect the delivered weight.
Use theoretical values for estimating, planning, preliminary calculations, stock estimates and transportation planning. For final procurement, fabrication or engineering work, verify the applicable standard, actual dimensions and certified material documentation.
Frequently Asked Questions
Pipe weight can be calculated from the pipe wall cross-sectional area and material density. For carbon steel, a commonly used approximation is Weight (kg/m) = (OD − WT) × WT × 0.02466 when OD and WT are in millimetres. The calculator uses the cross-sectional area formula.
A 2 inch Schedule 40 carbon steel pipe with an OD of 60.3 mm and wall thickness of 3.91 mm has a theoretical weight of approximately 5.44 kg/m or 3.65 lb/ft.
Schedule 80 generally has a thicker wall than Schedule 40 for the same nominal pipe size. The greater steel cross-sectional area results in a higher theoretical weight.
Not necessarily. If outside diameter, wall thickness, length and material density are identical, seamless and welded pipes have the same theoretical geometric weight. Actual supplied weights may vary within applicable manufacturing tolerances.
For the same outside diameter and wall thickness, a material with a higher density has a higher theoretical weight. The calculator allows the selected material density to be used in the calculation.
MS, or mild steel, pipe weight depends on outside diameter and wall thickness. For example, a 1 inch Schedule 40 carbon steel pipe is approximately 2.50 kg/m theoretically.
Multiply kg/m by 0.671968975 to convert to lb/ft. For the reverse conversion, multiply lb/ft by approximately 1.48816.
Chart values are theoretical. Actual pipe weight can differ because of permitted dimensional tolerances, material density variation, surface condition, coatings, threads, bevels and end preparation.