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Pipe Weight Calculator

Construction

Calculate the weight of a hollow steel, stainless, aluminum, or PVC pipe from outer diameter, wall thickness, and length. Get total weight and weight per foot.

Reviewed by the thecalcu.com team · Last updated July 27, 2026

0.2548
0.014
1500

Total Weight

190.7
Weight per Foot
9.53

This calculator computes your Total Weight, Weight per Foot from the values you enter.

Inputs
Outer DiameterWall ThicknessLengthMaterial
Outputs
Total WeightWeight per Foot

What is a Pipe Weight?

A Pipe Weight Calculator estimates the weight of a hollow pipe based on its outer diameter, wall thickness, length, and material. Because a pipe is hollow rather than solid, its weight depends on the annular cross-sectional area of the pipe wall, not the full circular area used for solid bar stock. Fabricators, contractors, and engineers use this calculation constantly for shipping quotes, structural load planning, and verifying supplier specs.

The calculator subtracts the inner diameter (outer diameter minus twice the wall thickness) from the outer diameter to find the wall's cross-sectional area, then multiplies by length and material density to get total weight. Supported materials include Steel, Stainless Steel, Aluminum, and PVC. For solid bar or rod instead of hollow pipe, use the Metal Weight Calculator.

Why Use a Pipe Weight Calculator?

Piping projects often involve long runs where even small weight-per-foot differences add up significantly across the total order. A contractor ordering 20 feet of 4-inch Schedule 40 steel pipe needs an accurate total weight figure to plan crane rigging, truck loading, or a supplier freight quote, guessing can mean an undersized lifting plan or an inaccurate shipping estimate.

This calculator handles the hollow cross-section math automatically. Enter outer diameter, wall thickness, length, and material, and get both total weight and weight per foot instantly. Pair it with the Rebar Calculator when your project also includes reinforcing bar for concrete work.

Who Should Use This Calculator?

  • Plumbing and mechanical contractors, estimate pipe run weight for handling and installation planning.
  • Structural and process engineers, verify pipe weight for support spacing and load calculations.
  • Metal and pipe suppliers, quickly confirm order weights for customer quotes and shipping.
  • Riggers and crane operators, calculate lift weight before moving long pipe sections.
  • Estimators and procurement teams, compare material costs across steel, stainless, aluminum, and PVC options.

Anyone specifying or ordering hollow pipe or tubing benefits from this calculation. Also see the Metal Weight Calculator for solid bar stock and the Plate Weight Calculator for flat sheet metal.

What Insights Does the Pipe Weight Calculator Give You?

Total Weight (lb) is the primary output, the full weight of the pipe for the length entered. Use this for shipping quotes, crane rigging plans, and verifying supplier invoices.

Weight per Foot (lb/ft) shows the weight for a single linear foot of pipe, the standard unit used on most steel pipe spec sheets and mill certificates. This figure is useful for quickly scaling to a different length without recalculating, or for cross-checking a supplier's published weight-per-foot rating.

Together, these outputs give you both the total order weight and the standardized per-foot figure needed for planning and verification.

How to use this Pipe Weight calculator

  1. Enter the Outer Diameter of the pipe in inches, using the actual measured diameter rather than nominal pipe size.
  2. Enter the Wall Thickness in inches (check a Schedule chart if you don't have this measurement directly).
  3. Enter the total Length of the pipe run in feet.
  4. Select the Material, Steel, Stainless Steel, Aluminum, or PVC, to apply the correct density.
  5. Review the Total Weight result, shown as the highlighted primary output.
  6. Check the Weight per Foot output to scale the estimate to a different pipe length without re-entering all values.
Show formula & methodology ↓Show less ↑

Formula & Methodology

The calculator uses the standard hollow-cylinder (annulus) formula:

inner_diameter = outer_diameter − (2 × wall_thickness)

cross_section_area = (π ÷ 4) × (outer_diameter² − inner_diameter²)

volume_in³ = cross_section_area × (length_ft × 12)

total_weight = volume_in³ × density

weight_per_foot = total_weight ÷ length_ft

Where diameters and thickness are in inches, length_ft is in feet, and density is in lb/in³ (Steel 0.2836, Stainless Steel 0.2860, Aluminum 0.0975, PVC 0.0491).

Worked example: A 4-inch outer diameter steel pipe, 0.237-inch wall thickness, 20 feet long.
- inner_diameter = 4 − (2 × 0.237) = 3.526 in
- cross_section_area = (π ÷ 4) × (4² − 3.526²) = 3.02 in²
- volume = 3.02 × (20 × 12) = 724.8 in³
- total_weight = 724.8 × 0.2836 = 205.6 lb
- weight_per_foot = 205.6 ÷ 20 = 10.28 lb/ft

Frequently Asked Questions

How is pipe weight different from solid bar weight?
A pipe is hollow, so only the material in the pipe wall contributes to its weight, unlike a solid bar where the entire cross-section is metal. The calculator subtracts the inner diameter (outer diameter minus twice the wall thickness) from the outer diameter to find the annular cross-sectional area before calculating volume and weight. For solid round or square stock, use the [Metal Weight Calculator](/metal-weight-calculator/) instead.
What is the formula for calculating steel pipe weight?
The calculator finds the cross-sectional area of the pipe wall using (π ÷ 4) × (outer diameter² − inner diameter²), multiplies by length in inches to get volume, then multiplies by the material's density. For standard steel at 0.2836 lb/in³, this produces both total weight and weight per foot, the two most commonly quoted figures in pipe specifications.
How do I find the inner diameter of a pipe?
Inner diameter equals outer diameter minus twice the wall thickness, since wall thickness applies to both sides of the pipe. For example, a 4-inch outer diameter pipe with 0.237-inch wall thickness has an inner diameter of 4 − (2 × 0.237) = 3.526 inches. The calculator performs this step automatically once you enter outer diameter and wall thickness.
What is Schedule 40 pipe and how does it relate to wall thickness?
Schedule 40 is a standard wall thickness rating used in the US piping industry, for example, a 4-inch Schedule 40 steel pipe has a wall thickness of approximately 0.237 inches, which is the calculator's default value. Different schedules (Schedule 80, Schedule 160, etc.) use thicker walls for higher pressure ratings, so check your pipe's spec sheet for the correct wall thickness before calculating weight.
Why does weight per foot matter for pipe orders?
Weight per foot lets you quickly estimate total shipment weight for any length of pipe without recalculating from scratch, and it's the standard unit used on most steel pipe spec sheets and mill certificates. If you know weight per foot, you can multiply by total footage needed to estimate freight costs or verify a supplier's quote.
Does this calculator work for PVC and aluminum pipe?
Yes, the Material dropdown includes Steel, Stainless Steel, Aluminum, and PVC, each with its own density value. PVC is significantly lighter than steel (0.0491 lb/in³ vs. 0.2836 lb/in³), so switching materials on the same pipe dimensions will produce a much lower weight for PVC piping.
How accurate is the pipe weight calculation compared to mill certificates?
The calculation is mathematically precise for the exact dimensions and density entered, matching standard engineering formulas used across the piping industry. Slight differences from a mill certificate can occur due to manufacturing tolerances on wall thickness or minor density variations between specific alloy batches, so treat mill certificates as the authoritative source for critical structural applications.
What is the difference between nominal pipe size and actual outer diameter?
Nominal Pipe Size (NPS) is a naming convention that does not always match the actual outer diameter, for example, a 4-inch NPS pipe has an actual outer diameter of 4.5 inches. Always use the actual outer diameter from a pipe spec chart, not the nominal size label, when entering values into this calculator for accurate results.
How do I calculate total weight for a long pipe run?
Enter the pipe's outer diameter, wall thickness, and the full run length in feet, and the calculator returns the total weight for that entire length directly. This is more convenient than calculating weight per foot separately and multiplying by hand, especially for irregular lengths.
Can I use this calculator for rebar or solid rod instead of pipe?
No, this calculator assumes a hollow cross-section. For solid round or square bar stock, use the [Metal Weight Calculator](/metal-weight-calculator/), and for rebar specifically, use the dedicated [Rebar Calculator](/rebar-calculator/), which uses standard bar-size weight tables instead of a diameter-based formula.
Also known as
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