Pipe weight calculator
Pipe mass from outside diameter, wall thickness, length and material density.
Fill in the fields and the result will appear here automatically.
Calculates mass of a straight round pipe with constant wall thickness, mass per metre and geometric bore volume. Enter outside diameter, wall, length and material density. The calculated inside diameter is geometric, not automatically a DN designation or fitting size. Strength, fluid flow and transport conditions are not checked.
How it works
Formula and logic
Inside diameter d=D−2t. Metal area S=πt(D−t)/10⁶ in m² with D and t in mm; this equals the annulus π(D²−d²)/4 without subtracting nearly equal squares. Mass=S·L·ρ in kg for L in m and ρ in kg/m³. Bore volume=πd²L/4000 in litres. All inputs are positive and finite; 2t<D is required.
Example
A steel 108×4 pipe six metres long weighs 61.6 kg — about 10.3 kg per metre. Assumed density: 7850 kg/m³.
Fields and units
- Outside diameter — mm
- Wall thickness — mm
- Length — m
- Material density — kg/m³
How to use
- — Enter geometric outside diameter and wall in mm, not nominal DN.
- — Enter length in m and material density manually in kg/m³.
- — Check 2t<D and account for fittings, coatings and actual tolerances separately.
Method and limitations
- Calculation method
- Formula and logic
- Limitation
- The calculated inside diameter is geometric, not automatically a DN designation or fitting size. Strength, fluid flow and transport conditions are not checked.
FAQ
Why is the wall subtracted twice?
Wall exists on both sides of the diameter. D=108 mm and t=4 mm give d=100 mm. Doubling t does not exactly double area πt(D−t).
Which density should I enter?
Use actual material data in kg/m³. The 7850 value is an example assumption, not a certificate for every steel. There is no material selector or universal table.
Is this the exact mass of a delivered batch?
No. Inputs describe ideal geometry and density. Tolerances, coatings, seams and variation can alter mass; suitability for transport or lifting is not established.
Are other profiles and connections included?
No. Only round pipe is covered. Square tubes, corner radii, couplings, flanges and additional joint metal are separate quantities.