Steel pipe weight calculator
Pipe by NPS and schedule, resolved to OD and wall from ASME B36.10M. 1 foot of 2" Schedule 40 mild steel is 3.65 lb in the published table (3.66 by our math). 10 feet of 4" Schedule 80 is 150 lb. Pick the size and schedule, get the number. No hunting for wall thickness tables.
Updated September 2026
Quick answer
Calculate steel pipe weight by NPS and schedule. Schedule 40, 80 (XS), and XXS.
Steel pipe weight per foot (Schedule 40 mild steel)
Dimensions from ASME B36.10M, NPS 1/2" through 24". Our lb/ft = π/4 × (OD² − ID²) × 12 × 0.2836, the same math as the calculator. The last column is the weight printed in the B36.10M table; the two agree to within half a percent. For Schedule 80 or XXS use the calculator above and pick a different schedule, or see the full pipe weight chart.
Questions welders ask about this one
What is Schedule 40 steel pipe?
Schedule 40 is the most common steel pipe wall thickness for plumbing, structural, and light industrial use. For NPS 1/2 through 10 it is the same as "STD" (standard weight). From 12" up it is a heavier wall than STD: 12" Sch 40 is 0.406". Wall thickness varies by NPS size. The chart above has the exact values from ASME B36.10M.
How much does 1 foot of 2 inch Schedule 40 steel pipe weigh?
The ASME B36.10M table lists 3.65 lb/ft. Computed from OD 2.375 in, wall 0.154 in, density 0.2836 lb/in³, it comes out 3.66 lb/ft. The small gap is rounding in the published table.
What is the difference between Schedule 40 and XS (Extra Strong)?
XS is the same as Schedule 80 for NPS 1/2 through 8. It has a thicker wall and higher pressure rating. Above 8" the names split: 10" and up, Schedule 80 is a heavier wall than XS. The calculator and chart use the schedule-number walls for every size, so pick Schedule 80 when your drawing says Sch 80. If it says XS on a 10" or bigger line, check the wall with your supplier. XXS stops at 12" in B36.10M.
Weight is only half of material cost. To turn these pounds into a number you can quote, run the weld cost calculator for wire, gas, and labor per inch, or the job pricing calculator to build the whole bid.
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