What formula is used to calculate pipe weight?

The formula is: Weight = (π ÷ 4) × (OD² − ID²) × Length × Density. OD is the outer diameter, ID = OD − 2 × Wall Thickness. This calculates the volume of the hollow cylinder wall and multiplies by density.

What is the standard density of carbon steel pipe?

Carbon steel (mild steel) has a standard density of 7850 kg/m³ (0.284 lb/in³), used in most structural and pressure piping calculations per ASME and EN standards.

How do I find the wall thickness of a pipe?

Wall thickness (also called schedule) is stamped on the pipe or listed in its datasheet. Common schedules are SCH 40, SCH 80, and SCH 160. Enter the thickness value directly — this calculator accepts any numeric value.

Can I calculate weight for multiple pipes?

Yes. Enter the quantity in the Quantity field and the calculator multiplies the single-pipe weight by that number to give the total weight for the batch.

Does this work for metric and imperial units?

Yes. You can mix and match units — enter diameter in inches, thickness in mm, and length in meters if needed. Each field has its own unit selector.

What is the linear weight (kg/m)?

Linear weight is the weight per meter of pipe, useful for ordering by length. It equals the weight of a 1-meter section and is shown in the result details.

Steel Pipe Weight Calculator

Name: Steel Pipe Weight Calculator
Availability: InStock
Author: Nham Vu

Enter outer diameter, wall thickness, length, and material to instantly calculate the weight of a steel pipe in kg and lbs.

Pipe Dimensions

Outer Diameter (OD)

Wall Thickness

Length

Material

Quantity (pipes)

Formula Reference

W = (π / 4) × (OD² − ID²) × L × ρ

Where OD = outer diameter (m), ID = OD − 2×t (m), t = wall thickness, L = length (m), ρ = density (kg/m³).

Enter pipe dimensions on the left and click Calculate.

Common Schedule 40 Carbon Steel Pipe Sizes

NPS	OD (mm)	Wall (mm)	kg/m
½"	21.34	2.77	1.27
¾"	26.67	2.87	1.69
1"	33.40	3.38	2.50
2"	60.33	3.91	5.44
3"	88.90	5.49	11.29
4"	114.30	6.02	16.07
6"	168.28	7.11	28.26
8"	219.08	8.18	42.55

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Summary

Enter outer diameter, wall thickness, length, and material to instantly calculate the weight of a steel pipe in kg and lbs.

How it works

Enter the outer diameter (OD) of the pipe in your preferred unit.
Enter the wall thickness of the pipe.
Enter the pipe length.
Select the material to apply the correct density.
Optionally enter a quantity for multiple pipes.
The calculator applies Weight = π/4 × (OD² − ID²) × L × ρ and displays results in kg and lbs.

Use cases

Estimating steel pipe weight for structural and mechanical engineering projects.
Calculating shipping and freight weight for pipe orders.
Preparing bill of materials (BOM) for fabrication and construction.
Comparing pipe weights across different materials or wall thicknesses.
Checking load limits on pipe supports and hangers.
Verifying theoretical weight against mill certificates.
Pipe rack and spool weight calculations for plant design.

Frequently Asked Questions

Last updated: 2026-06-22 · Reviewed by Nham Vu