# What Is Unit Weight of Steel | Unit Weight of Steel Bar Formula | Steel Unit Weight | How to Calculate Steel Bar Unit Weight | 8mm Steel Weight | 10mm Steel Weight | 12mm Steel Weight | 16mm Steel Weight | 20 mm Steel Weight | 25mm Steel Weight

The** unit weight** of any **substance** is defined as the** ratio of mass** or** weight per unit volume**. It is generally measured in** pound/ft**, gm/cm or, **kg/cm **or kg/m, etc.

The** density of steel** is around **7850 kg/m3** or 7.85 g/cm3 or** 490 lbs/ft3** or **13231 lbs/yd3**.

T**here **are various **steel diameters** used in construction are –

**8mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 32 mm, and 40 mm.**

The **steel diameter **used for **normal residentia**l, commercial, and **office building **construction is **8 mm to 20 mm.**

The **steel diameter** **25 mm to 40 mm** is used for **heavy construction** like **bridges**, dams, and **retaining walls.**

**Formula Used To Calculate Weight of Steel**

The **formula** used to calculate the **unit weight of steel bars** is **D²/162**.

Where, **D = Dia. Of steel **bars

**and 162 i**s a **constant value.**

**Steel Reinforcement Bar Unit Weight Calculator**