🔧 Pipe Weight Calculator

A pipe schedule is a standardised wall thickness designation used in the US. Common schedules are Sch 10, Sch 40, and Sch 80. Higher schedule numbers mean thicker walls and heavier pipes. For example, 4-inch Sch 40 has a wall thickness of 6.02 mm while Sch 80 is 8.56 mm.

Nominal Pipe Size (NPS) is a dimensionless designator that does NOT directly correspond to actual outer diameter. For NPS below 14 inches, the OD is larger than the nominal size. From NPS 14 upward, the OD equals the nominal size in inches. Always use the actual OD for weight calculations.

Different materials have different densities. Steel (7850 kg/m³) is the heaviest common pipe material, aluminium (2700 kg/m³) is about one-third the weight, and PVC (1400 kg/m³) is even lighter. The same pipe dimensions in aluminium weigh roughly 34% of an equivalent steel pipe.

To convert from kg/m to lbs/ft, multiply by 0.6720. For example, 16 kg/m × 0.6720 = 10.75 lbs/ft. Alternatively, 1 kg/m = 0.6720 lbs/ft.

DN is the metric designation for pipe sizes used in international standards (ISO, EN). DN sizes correspond roughly to NPS × 25. For example, DN 100 ≈ NPS 4. Unlike NPS, DN numbers more closely approximate the internal bore in millimetres for smaller sizes.