🔩Steel & Galvanized Pipe Weight Calculator

Enter pipe OD, wall thickness, length, and quantity to instantly calculate total weight in kg and lb.

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Steel & Galvanized Pipe Weight Calculator Guide

Enter the pipe's outer diameter (OD), wall thickness, length in feet, and quantity. The calculator shows unit weight, per-piece weight, and total weight in both kg and lb. Standard NPS pipe presets are included for quick selection.

Weight Formula

Weight (kg/m) = π × (OD − T) × T × density ÷ 100. OD and T are in mm, density for carbon steel is 7.85 g/cm³. For example, NPS 2" (60.33mm OD × 3.91mm wall) weighs about 5.44 kg/m (3.65 lb/ft).

Galvanized vs. Black Steel

Galvanized (zinc-coated) pipe is used for outdoor, wet, or exposed installations to prevent rust. Black steel is used for gas lines and indoor applications where additional corrosion protection is added later. The weight difference due to the zinc coating is negligible in practice.

Frequently Asked Questions

How heavy is a 20 ft section of NPS 2" steel pipe?

NPS 2" (OD 60.33mm, T 3.91mm) weighs about 5.44 kg/m. At 20 ft (6.1m): 5.44 × 6.1 ≈ 33.2 kg (73.1 lb).

Why does NPS 2" have an OD of 2.375 inches, not 2 inches?

NPS designations are nominal — they originally referred to the approximate bore (ID), but OD dimensions were standardized to enable consistent fittings and couplings across manufacturers. The outer dimension is fixed; wall thickness varies by schedule.