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Pipe Weight Calculator

Find steel pipe weight per foot and total weight from outside diameter, wall thickness, and length using the standard plain-end pipe weight formula.

Also covers line pipe weight — same formula, per-length total.

Result

10.8 lb/ft

A 4.5 in OD pipe with 0.237 in wall thickness weighs 10.8 lb/ft, or 216.01 lb for 20 ft

Quick Answer

A pipe weight calculator multiplies 10.69 by wall thickness by (OD − wall thickness) to get pounds per foot for plain-end steel pipe. A 4.5 in OD pipe with 0.237 in wall thickness weighs about 10.8 lb/ft, or 216 lb over 20 feet.

What A Pipe Weight Calculator Measures For Steel Pipe

A pipe weight calculator finds the weight per foot of steel pipe from its outside diameter and wall thickness, then multiplies by length for a total. The formula, standard across ASME and pipe industry references, is 10.69 × WT × (OD − WT) for pounds per linear foot of plain-end steel pipe. Line pipe weight calculator and weight calculator pipe searches use this identical formula since "line pipe" describes pipe used in oil, gas, and water transmission lines rather than a different weight calculation. Always confirm outside diameter and wall thickness from a pipe schedule chart using the true dimensions, not the nominal pipe size (NPS) label, since NPS values do not match actual OD for most sizes.

How Steel Pipe Weight Per Foot Is Calculated

Weight per foot (lb/ft) = 10.69 × wall thickness × (outside diameter − wall thickness). Total weight = weight per foot × length.

  • Weight per foot = 10.69 × WT × (OD − WT).
  • OD = outside diameter in inches; WT = wall thickness in inches.
  • Total weight = weight per foot × pipe length in feet.
  • Formula applies to plain-end steel pipe.

Using This Line Pipe Weight Calculator In Four Steps

Inputs

  • Outside diameter: the true OD in inches, not the nominal pipe size.
  • Wall thickness: the true wall thickness in inches, from a pipe schedule chart.
  • Length: total pipe length in feet.

Steps

  1. Look up the actual outside diameter for the pipe schedule and nominal size.
  2. Look up the actual wall thickness for the same schedule.
  3. Enter both values in inches.
  4. Enter the pipe length in feet.
  5. Read weight per foot and total weight in pounds.

Pipe Weight Example With Each Step Shown

4.5 in outside diameter, 0.237 in wall thickness, 20 ft length (NPS 4, Schedule 40 steel pipe).

  1. OD minus WT: 4.5 in − 0.237 in = 4.263 in.
  2. Multiply by WT: 4.263 in × 0.237 in = 1.010331.
  3. Multiply by constant: 1.010331 × 10.69 = 10.80 lb/ft.
  4. Total weight: 10.80 lb/ft × 20 ft = 216.0 lb.

10.8 pounds per foot, or 216 pounds total for 20 feet of NPS 4 Schedule 40 steel pipe.

When A Pipe Weight Estimate Fits A Piping Project Plan

Use the estimate for shipping weight, structural support load, and material takeoff checks on steel pipe runs. Confirm the schedule, grade, and coating with the pipe supplier before finalizing a load calculation.

For nearby tools, the engineering calculators hub lists every material and flow calculator, and the glossary defines common calculator terms.

Assumptions

  • Pipe is plain-end steel with uniform wall thickness.
  • Outside diameter and wall thickness are the true dimensions, not nominal size.
  • No coating, threading, or fitting weight is included.

Limitations

  • Coatings, linings, and threaded ends add weight not captured here.
  • Non-steel pipe (PVC, copper, etc.) uses a different density and is not covered.
  • The tool does not check structural support spacing or code compliance.

In Practice

A common mistake is using nominal pipe size (NPS) instead of actual outside diameter. NPS 4 pipe has an actual OD of 4.5 inches, not 4 inches. Always pull the true OD and wall thickness from a pipe schedule chart, not the nominal size label. This is the same calculation used for line pipe weight calculator and weight calculator pipe searches, since line pipe is a trade term for the same plain-end steel pipe formula, not a different calculation.

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Frequently Asked Questions About Pipe Weight

Is A Pipe Weight Calculator The Same As A Line Pipe Weight Calculator?

Yes, line pipe is a trade term for steel pipe used in transmission lines, and it uses the same plain-end weight formula as general pipe weight calculations. There is no separate line pipe formula.

Why Use Actual OD Instead Of Nominal Pipe Size?

Nominal pipe size (NPS) is a label, not a true measurement. NPS 4 pipe has an actual outside diameter of 4.5 inches. Using the nominal number instead of the actual OD gives an incorrect weight result.

Does Wall Thickness Alone Determine Pipe Schedule?

Wall thickness combined with outside diameter determines the schedule designation (e.g. Schedule 40, Schedule 80). Always pull both values from the same schedule chart entry rather than mixing sources.

Does This Formula Work For Non-Steel Pipe?

No, the 10.69 constant is calibrated for steel density. PVC, copper, and other materials have different densities and need a different weight formula or a material-specific density input.

Sources

Last updated: . Reviewed for accuracy against the formula shown above.