Construction Weight Calculator – Steel, Concrete, Sand & Aggregate
Construction Weight Calculator A Construction Weight Calculator helps civil engineers, site engineers, quantity surveyors, contractors, and students estimate the approximate weight of construction materials. 1. Steel Bar Weight Calculator The most commonly used formula for estimating the weight of a reinforcement bar is: Weight (kg) = D² × L / 162 Where: D = diameter of steel bar in mm L = length of bar in metres Weight = approximate weight in kg Example Calculate the weight of a 16 mm diameter, 12 m long reinforcement bar. Weight = 16² × 12 / 162 Weight = 18.96 kg Therefore: 16 mm × 12 m steel bar ≈ 18.96 kg Common Rebar Weights Bar Diameter Approx. Weight per metre 6 mm 0.222 kg/m 8 mm 0.395 kg/m 10 mm 0.617 kg/m 12 mm 0.889 kg/m 16 mm 1.580 kg/m 20 mm 2.469 kg/m 25 mm 3.858 kg/m 28 mm 4.840 kg/m 32 mm 6.321 kg/m 40 mm 9.877 kg/m These are approximate theoretical values based on a steel density of about 7,850 kg/m³ . 2. Steel Quantity Calculator You can calculate the tot...