Steel Pipe Weight Calculator

Introduction

This Steel Pipe Weight Calculator tells you how much a pipe weighs. Just type in the outer diameter (OD), the wall thickness, and the length. The tool gives you the weight per foot or per meter, plus the total weight of the whole pipe.

You can work in imperial units (inches, feet, pounds) or metric units (millimeters, meters, kilograms). Switch between them any time, and your numbers convert for you. If you use standard pipe sizes, pick an NPS size and schedule from the drop-down list. The OD and wall thickness fill in on their own, and you can still change them.

Pick your material too. The calculator includes carbon steel, stainless steel 304 and 316, aluminum, and galvanized steel. Each one has its own density, so the weight changes to match.

Along with the answer, you get the inner diameter (ID), a table with both metric and imperial results, and a step-by-step solution that shows every formula used. Two charts let you see how weight grows with length and how it changes from one material to another.

Pipe weight matters for shipping costs, crane picks, pipe supports, and load checks. This tool gives you a fast, clear number so you can plan your job with confidence.

How to Use Our Steel Pipe Weight Calculator

Enter your pipe size, wall thickness, length, and material. The calculator gives you the weight per unit length, the total pipe weight, the inner diameter, and the density it used.

Unit System: Pick Imperial (in / ft / lb) or Metric (mm / m / kg). Your numbers change over on their own when you switch.

Outer Diameter (OD): Type the distance across the outside of the pipe. Pick the unit you want from the drop-down next to the box.

Wall Thickness (WT): Type how thick the pipe wall is. It must be less than half the outer diameter, or you will see an error.

Total Pipe Length: Type how long your pipe run is. Pick feet, inches, yards, meters, centimeters, or millimeters.

Pipe Schedule Auto-Fill: Optional. Pick a standard NPS size and schedule (40, 80, 160, or XXS) to fill in the OD and wall thickness for you. You can still edit both boxes after.

Material / Density: Choose carbon steel, stainless steel 304 or 316, aluminum, or galvanized steel. The density of that metal sets the weight.

Calculate and Reset: Click Calculate to see your steel pipe weight results, a full metric and imperial table, the step-by-step math, and two charts. Click Reset to go back to the starting values.

Result Units: Each result box has its own drop-down. Change it to show weight in lb/ft, kg/m, lb, kg, tons, or other units you need.

Steel Pipe Weight: What It Means

Pipe weight is how heavy a piece of pipe is. A pipe is a hollow tube, so only the metal ring around the hole has weight. The more metal in that ring, the heavier the pipe.

Three things set the weight: the outer diameter (OD), the wall thickness (WT), and the length. A fourth thing, the density of the metal, tells you how heavy that metal is for its size.

Key Pipe Terms

OD – the distance across the outside of the pipe.
WT – how thick the metal wall is.
ID – the hole inside. ID = OD − (2 × WT).
NPS – "nominal pipe size," a name tag like 2" or 6". It is not the real OD for small sizes.¹
Schedule – a number like 40, 80, or 160 that sets the wall thickness. Higher schedule means thicker wall, more weight, and higher pressure rating. For one NPS, the OD stays the same and only the wall changes.¹

How Pipe Weight Is Found

First find the ring of metal, called the cross-section area:

Area = (π ÷ 4) × (OD² − ID²)

This is just the ring between two circles. Since the pipe is a hollow cylinder, the metal volume matches what the cylinder volume calculator finds for the outer tube minus the bore.

Then multiply by density to get weight per foot or per meter, and multiply again by the length to get total weight:

Weight per length = Density × Area
Total weight = Weight per length × Length

Quick Shop Formulas

Shops often use these fast checks for carbon steel:

Pounds per foot = 10.69 × (OD in inches − wall) × wall
Kilograms per meter = 0.02466 × (OD in mm − wall) × wall

These work well for steel. For other metals, use the real density.

Common Metal Densities

Material	Density (g/cm³)	Density (lb/in³)
Carbon Steel	7.85	0.284
Stainless Steel 304	8.00	0.289
Stainless Steel 316	8.03	0.290
Aluminum	2.71	0.098

The carbon steel figure matches the 490 lb/ft³ the U.S. Federal Highway Administration uses for steel in its bridge design examples.² That is 7.85 g/cm³. Aluminum pipe of the same size weighs about one third as much as steel pipe.

Why Pipe Weight Matters

Shipping cost – trucks and freight are priced by weight.
Lifting – cranes, slings, and crews need to know the load.
Supports – hangers, racks, and beams must hold the pipe.
Buying steel – pipe is often sold by the pound or kilogram.

Note: this is the weight of the empty pipe. Water, oil, gas, or insulation adds more. Use the pipe volume calculator for the fluid inside. Real pipe can also weigh a little more or less than the chart says. ASTM A53 lets the weight of steel pipe vary by up to 10% either way.¹

Formulas used

Inner Diameter

D_i = D_o - 2t

Metal Cross-Sectional Area

A = \frac{\pi}{4}\left(D_o^2 - D_i^2\right)

Weight per Unit Length

w = \rho \cdot A

Total Pipe Weight

W = w \times L

Industry Shortcut (Metric, kg/m)

w_{\text{shortcut}} = 0.02466 \times (D_{o,\text{mm}} - t_{\text{mm}}) \times t_{\text{mm}}

Industry Shortcut (Imperial, lb/ft)

w_{\text{shortcut}} = 10.69 \times (D_{o,\text{in}} - t_{\text{in}}) \times t_{\text{in}}

Density Unit Conversion

\rho_{\text{lb/in}^3} = \frac{\rho_{\text{kg/m}^3}}{27679.9047}

Frequently asked questions

Why do I get an error when I type my wall thickness?

The wall must be less than half the outer diameter. If the wall is half the OD or more, there is no hole left, so the pipe is really a solid bar.

Check that both boxes use the same unit. A common mistake is typing the OD in inches and the wall in millimeters.

Why is the OD of a 2 inch pipe 2.375 inches and not 2 inches?

For sizes under 14 inches, NPS is only a name, not a real measurement.¹ A 2" pipe always has an outside diameter of 2.375 in (60.3 mm).¹

From 14 inches up, the NPS number does match the true OD. A 14" pipe is 14.000 in across, and a 16" pipe is 16.000 in.¹

Does Schedule 80 pipe have a bigger outside diameter than Schedule 40?

No. For the same NPS, the OD stays the same and only the wall gets thicker.¹

That means Schedule 80 has a smaller hole (ID), more metal, and more weight than Schedule 40.¹

How much does a 20 foot stick of 2 inch Schedule 40 steel pipe weigh?

About 73 lb (33 kg). That pipe weighs roughly 3.66 lb/ft (5.44 kg/m).¹

Pick NPS 2" (SCH 40) from the auto-fill list, type 20 ft for length, and the tool shows the exact number.

What does XXS mean in the schedule list?

XXS means double extra strong. It is a very thick wall used for high pressure or heavy abuse.

XXS pipe is much heavier than Schedule 40 of the same size, so always check the total weight before you lift it.

Why does galvanized steel show the same weight as carbon steel?

The zinc coating is very thin, so the tool uses the same density as carbon steel, 7,850 kg/m³. That is 490 lb/ft³, the figure the U.S. Federal Highway Administration uses for steel.²

Real galvanized pipe weighs a little more because of the zinc, and the extra share is larger on small, thin-walled pipe. Add a small margin if you need an exact shipping weight.

What if I only know the inner diameter and the wall?

Add two walls to the ID to get the OD. So OD = ID + (2 × wall).

For example, 2" Schedule 40 pipe has an ID of 2.067 in and a 0.154 in wall.¹ That gives 2.067 + 0.308 = 2.375 in OD.

Does the answer include water or other fluid inside the pipe?

No. The result is the weight of the empty pipe only.

Water inside adds a lot. To find the fluid weight, get the inside volume first, then multiply by the fluid density.

What is the difference between tonne and US short ton in the results?

A tonne (metric ton) is 1,000 kg and a US short ton is 2,000 lb.³ So a tonne is about 2,205 lb and a short ton about 907 kg.

Pick the one your supplier or trucking company uses, or you may be off by about 10%.

Can I add a material that is not in the list?

Not directly. The list has carbon steel, stainless 304 and 316, aluminum, and galvanized steel.

For another metal, pick the closest one, then scale the answer. Multiply by your density divided by the density shown in the results.

How do I find the weight for many pipes at once?

Add up the total length first. Ten sticks of 20 ft equals 200 ft.

Type that total in the length box. The tool then gives the weight for the whole lot.

What do the two charts show me?

The first chart shows how total weight grows as the pipe gets longer. It is a straight line, since weight and length rise together.

The second chart compares the same pipe made from each material, so you can see how much lighter aluminum is than steel.

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