Steel Pipe Weight Calculator (Circular, Square & Rectangular) KG/MTR or LB/FT | Free Online Tool for Engineers
Instantly calculate seamless steel pipe weight in KG/MTR or LB/FT. Enter diameter, thickness, and length to get accurate weight per meter and total pipe weight.
This comprehensive pipe weight calculator helps engineers, construction professionals, and metal fabricators quickly determine the weight and volume of three common steel pipe profiles:
- Seamless Circular Steel Pipes
- Square Hollow Structural Sections (HSS)
- Rectangular Hollow Structural Sections (HSS)
The tool supports both metric (mm, kg) and imperial (inches, lbs) unit systems, making it suitable for international projects.
Seamless Steel Pipes – Circular
Total Volume: (m³)
Total Weight: (kg)
Hollow Structural Sections – Square
Total Volume: (m³)
Total Weight: (kg)
Hollow Structural Sections – Rectangular
Total Volume: (m³)
Total Weight: (kg)
Key Features:
✔ Triple Calculator in One – Circular, Square and Rectangular pipes
✔ Dual Unit System – Switch between metric and imperial units
✔ Volume Calculation – Displays both weight and material volume
✔ Input Validation – Prevents calculation errors with thickness checks
✔ Responsive Design – Works on desktop and mobile devices
✔ Instant Results – Real-time calculation with clear outputs
How to Use:
- Use “Clear” to reset the form
- Select your pipe shape (circular/square/rectangular)
- Choose your preferred unit system (metric/imperial)
- Enter the pipe dimensions:
- Circular: Outer diameter and wall thickness
- Square: Side length and wall thickness
- Rectangular: Height, width and wall thickness
- Input the pipe length
- (Optional) Specify quantity for multiple pipes
- Click “Calculate” to get results
Calculation Methodology
Circular Pipes
Weight = π × (OD² – ID²) × Length × Density / 4
Where:
OD = Outer diameter
ID = Inner diameter (OD – 2×thickness)
π = 3.1416
Density = 7850 kg/m³ (0.284 lb/in³ for steel)
Square HSS
Weight = [A² – (A-2t)²] × Length × Density
Where:
A = Outside side length
t = Wall thickness
Density = 7850 kg/m³ (0.284 lb/in³)
Rectangular HSS
Weight = [(H×W) – (H-2t)(W-2t)] × Length × Density
Where:
H = Outside height
W = Outside width
t = Wall thickness
Density = 7850 kg/m³ (0.284 lb/in³)
Note: All dimensions are converted to meters (or inches for imperial) before calculation. For multiple pipes, the weight is multiplied by quantity.
FAQ
Q1: What steel density does this calculator use?
A: We use standard carbon steel density of 7850 kg/m³ (0.284 lb/in³). For other materials, multiply results by their relative density.
Q2: Why does the calculator show an error for wall thickness?
A: The thickness cannot exceed half the diameter/side length as this would create negative internal dimensions.
Q3: How accurate are the calculations?
A: Results are theoretically precise for the given dimensions. Actual weights may vary slightly due to manufacturing tolerances.
Q4: Can I calculate aluminum pipes with this tool?
A: Yes, but you’ll need to manually adjust the final weight (aluminum density ≈ 2700 kg/m³).
Q5: What’s the maximum length I can calculate?
A: There’s no technical limit, but extremely large values may show scientific notation.
Q6: Does this include pipe end treatments or fittings?
A: No, this calculates only the raw pipe body weight. Add ≈5-10% for fittings if needed.
Q7: Why are my imperial unit results slightly different than manufacturer specs?
A: Some manufacturers use rounded conversion factors (e.g., 1 inch = 25.4 mm exactly).
Q8: Can I save my calculations?
A: Currently no save function, but you can screenshot results or note them down.
Q9: What pipe standards does this support?
A: The math works for any standard (ASTM, EN, JIS, etc.) as long as you input correct dimensions.
Q10: How is pipe volume calculated?
A: Volume = Cross-sectional area × Length, where area is the metal area (not internal capacity).
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