Pipe Weight Calculator
ConstructionCalculate 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.
Total Weight
190.7
Weight per Foot
9.53
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.
How to use this Pipe Weight calculator
- Enter the Outer Diameter of the pipe in inches, using the actual measured diameter rather than nominal pipe size.
- Enter the Wall Thickness in inches (check a Schedule chart if you don't have this measurement directly).
- Enter the total Length of the pipe run in feet.
- Select the Material — Steel, Stainless Steel, Aluminum, or PVC — to apply the correct density.
- Review the Total Weight result, shown as the highlighted primary output.
- Check the Weight per Foot output to scale the estimate to a different pipe length without re-entering all values.
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_ftis in feet, anddensityis 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
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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