How to Calculate Weight of Steel Bar Using D²/162 Formula (Quick Method)

Need to find the weight of a steel bar quickly, without a chart or a calculator full of constants? In this video, I explain the D²/162 formula, the standard shortcut civil engineers use on site to calculate the weight of reinforcement steel per meter. You’ll learn: ✅ What D²/162 means and where each value comes from ✅ How the formula is derived from the cross-sectional area of the bar and the density of steel (7850 kg/m³) ✅ How to use it for any bar diameter in millimeters (the result is in kg per meter) ✅ Worked examples for common bar sizes, such as 12 mm, 16 mm, and 20 mm ✅ How to find the total weight of a bar by multiplying by its length ✅ How to use it for quantity take-off, BBS (bar bending schedules), and BOQ checks ✅ Common mistakes, such as using the wrong units Quick example: for a 12 mm bar, weight per meter = 12² / 162 = 144 / 162 ≈ 0.89 kg/m. Whether you’re a site engineer, quantity surveyor, estimator, contractor, or civil engineering student, this video gives you a simple method you can use right away. 📩 Open to collaboration on engineering content, training, or research. Reach out via the links below. 20202.26886.minhal@gmail.com 🔔 Subscribe for more practical civil engineering and construction breakdowns. **#SteelWeightFormula #D2By162 #RebarWeight #SteelBarWeight #CivilEngineering #QuantityTakeoff #BarBendingSchedule #BOQ #ConstructionEngineering #SiteEngineer #QuantitySurveying #ReinforcementSteel #CivilEngineer #EngineeringFormulas #ConstructionEstimating #Rebar