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Steel pipe weight per linear foot for every NPS size from 1/2" to 8". Schedule 40, Schedule 80, and XXS. All dimensions from ASME B36.10M.
Quick answer
2 inch Schedule 40 steel pipe weighs 3.65 lb per foot. This chart covers NPS 1/2 through 8 in Schedule 40, 80, and XXS.
Steel pipe weight per foot
NPS 1/2" through 8" in Schedule 40, Schedule 80, and XXS. Wall thickness in inches, weight in pounds per linear foot. All values computed from ASME B36.10M outside diameters and wall thicknesses using a mild steel density of 0.2836lb/in³.
Dimensions per ASME B36.10M. Weight computed as π × (OD − wall) × wall × 0.2836 lb/in³ × 12 in/ft. Sch 40 = STD and Sch 80 = XS for NPS ≤ 10" and ≤ 8" respectively.
How pipe weight is calculated
The cross-sectional area of a pipe wall is the area of the outer circle minus the inner circle:
Multiply the cross-sectional area by 12 inches to get the volume per linear foot, then multiply by the steel density (0.2836 lb/in³ for A36 mild steel):
The outside diameters and wall thicknesses come from ASME B36.10M, the standard for wrought steel pipe. NPS (Nominal Pipe Size) defines the OD, and the schedule number determines the wall thickness for each size.
Common pipe weights
Quick reference for the most-requested Schedule 40 sizes:
Need a custom length or material?
This chart covers standard steel pipe in Schedule 40, 80, and XXS. If you need a specific length or a schedule not listed here, use the interactive calculator:
Steel Pipe Weight Calculator →Questions welders keep asking
How much does 2 inch schedule 40 pipe weigh per foot?
2" Schedule 40 steel pipe weighs 3.66 lb/ft. That is based on an OD of 2.375" and a wall thickness of 0.154" per ASME B36.10M. For a 20-foot stick, multiply by 20 to get the total weight.
What is the difference between Schedule 40 and Schedule 80 pipe?
The outside diameter is the same for a given NPS size. Schedule 80 has a thicker wall, which means a smaller inside bore, higher pressure rating, and more weight per foot. For example, 2" Sch 40 has a 0.154" wall while 2" Sch 80 has a 0.218" wall. That makes Sch 80 about 50% heavier per foot for that size.
What does NPS mean?
NPS stands for Nominal Pipe Size. It is a North American designation that loosely corresponds to the inside diameter for small sizes, but does not match any actual dimension exactly. What is standardized is the outside diameter. A 2" NPS pipe always has a 2.375" OD regardless of schedule. The wall thickness changes with the schedule, which changes the ID.
Does the schedule number indicate wall thickness?
Not directly. The schedule number is a pressure rating index defined as approximately 1000 times the ratio of internal pressure to allowable stress. Higher schedule means thicker walls, but the actual wall thickness varies by NPS size. Two pipes with the same schedule number but different NPS sizes will have different wall thicknesses. Always look up the exact wall thickness from the ASME B36.10M table.
How do I estimate pipe weight for a material order?
Find the NPS size and schedule in the chart above, note the weight per foot, and multiply by the total length you need. Add about 5% for cuts and waste. For example, if you need 200 feet of 4" Sch 40 pipe at 10.80 lb/ft, the order weight is roughly 2268 lb including waste.