A = π/4 × (OD² − ID²)
ID equals OD minus twice the wall thickness. Multiply the metal area by density for kg/m.
FABRICATION · PROCUREMENT · HANDLING
Pipe Weight Calculator — kg/m, lb/ft & Total Weight
Calculate round, square and rectangular pipe weight from actual dimensions. Get weight per metre, weight per foot, total empty or filled mass, and an exportable cut list.
Round, square & rectangularMetric & imperialEight material presetsCSV cut list
ODIDt
ODOuter diameterIDInternal diametertWall thickness
01 · Inputs
Define the pipe section
03 · Cut list0 items · 0 kg empty total
Add one or more pipe sizes to build a handling or procurement list.
QUICK ANSWER
How do you calculate pipe weight?
Subtract the hollow inside area from the outside cross-section, multiply the remaining metal area by length, then multiply by material density. A round pipe uses π/4 × (OD² − ID²). Square and rectangular hollow sections use outer area minus inner area. The result is theoretical mass; actual mill weight can differ with tolerances, corner radii, coatings and fittings.
GEOMETRY × DENSITY × LENGTH
One formula workflow for round, square and box pipe
Use actual outside dimensions and wall thickness rather than a nominal pipe name. The calculator normalizes units before applying the section formula.
A = B² − (B − 2t)²
This idealized formula does not deduct corner radii. Manufacturer tables control when tolerances matter.
A = B × H − (B − 2t)(H − 2t)
Use the outside width and height, then multiply kg/m by the piece length and quantity.
TYPICAL MATERIAL DENSITIES
Steel, stainless, aluminum, copper, brass and PVC
Density presets make early estimates faster. Select Custom density when a material certificate or specification gives a different value.
BUILT FOR A WORKING LIST
From one pipe to a full cut list
Estimate individual sections, add them to the browser-only list and export a clean CSV for planning or review.
Pipe weight per metre
Compare kg/m and lb/ft for round pipe, MS pipe, GI pipe, stainless pipe and hollow sections.
Quantity and cut list
Multiply by piece length and quantity, then combine different shapes, materials and dimensions in one export.
Optional filled weight
Add water or a custom fluid density to estimate contents mass and total filled handling weight.
OD and thickness inputs
Use measured or certified outside dimensions instead of assuming nominal diameter equals actual OD.
IMPORTANT SCOPE
Not a load-capacity or pressure calculator
This tool calculates theoretical weight only. It does not determine pressure rating, allowable span, bending strength, buckling, load capacity, structural suitability or safe lifting practice. Those decisions require the material grade, section properties, supports, joints, temperature, corrosion allowance, governing code and qualified engineering review.
RELATED CALCULATORS
Continue the estimate
Move between bulk material, dimensions, weight and finance using useful pages on BanglaTools.
PUBLIC REFERENCES
Standards and unit references
These official sources explain standardized wrought-steel pipe dimensions and the SI mass and length units used in the calculation.
Reviewed 31 July 2026- ASMEB36.10 — Welded and Seamless Wrought Steel PipeThe official standards page describes dimensional standardization for welded and seamless wrought steel pipe.
- National Institute of Standards and TechnologySI Units — MassThe U.S. measurement reference explains SI mass and the kilogram.
- National Institute of Standards and TechnologySI Units — LengthThe public reference explains the metre and common SI length relationships.
COMMON QUESTIONS
Pipe weight calculator: frequently asked questions
Answers about the formula, OD and thickness, kg/m, lb/ft, MS, GI, stainless steel, hollow sections, fluid weight and load-capacity limits.
How do I calculate steel pipe weight?
Find the metal cross-sectional area by subtracting the hollow inside from the outside shape, multiply that area by one metre of length, then multiply by material density. For a round steel pipe, the metal area is π/4 × (OD² − ID²), where ID = OD − 2 × wall thickness.
What is the pipe weight formula with OD and thickness?
For a round pipe, calculate ID = OD − 2t and then use mass per length = π/4 × (OD² − ID²) × material density. Keep dimensions in a consistent unit. The calculator converts metric or imperial entries before applying the formula.
What is the difference between kg/m and lb/ft?
Both describe linear mass: the weight for one unit of pipe length. One kg/m is approximately 0.67197 lb/ft. The tool always shows both so you can compare a metric mill certificate with an imperial procurement list.
Can I calculate MS, GI and stainless-steel pipe weight?
Yes. Choose mild/carbon steel for MS, galvanized steel for the base-metal estimate, or a stainless preset such as SS304 or SS316. Galvanizing, coatings, weld reinforcement, fittings and manufacturing tolerances can change the actual delivered weight.
Does the calculator support square and rectangular hollow pipe?
Yes. Select Square / box or Rectangular. The tool subtracts the inner rectangle from the outer rectangle and multiplies the remaining area by density, length and quantity. It does not model corner radii, so use the manufacturer's theoretical mass when precision is critical.
How do I calculate pipe weight per metre and total weight?
Enter the outside dimensions and wall thickness to get kg/m and lb/ft. Add length per piece and quantity to calculate the total empty weight. You can then add multiple sizes to the cut list and export a CSV.
Does this include the weight of water inside a pipe?
It can. Turn on Include contents / fluid and enter the fluid density. The calculator multiplies the internal cross-sectional area by length and density, then adds that contents mass to the empty pipe mass.
How much load can this pipe hold?
This calculator does not determine load capacity, pressure rating, buckling, span, structural strength or suitability. Those depend on material grade, yield strength, section properties, supports, joints, temperature, corrosion, code requirements and safety factors. Use the applicable standard and a qualified engineer.