In this blog, you will learn about **how to do steel weight calculation?** Further we will discuss about the **unit weight of steel calculation.**

Table of Contents

## How to calculate unit weight of steel bar?

**Steel** or reinforcement is an important element in civil engineering & construction field. If you are to to know how to do **steel weight calculation** or want to know the **unit weight of steel formula**. You are on right blog.

Steel is being used in construction for a long time. Steel got importance because of its **tensile strength**. As we know concrete is good in compressive strength but poor in tension, So the steel bars, reinforcement, wire meshes are being used in construction of structures with concrete.

### Steel weight calculation in meters (by dia in mm):

**How do you calculate the steel weight per meter?** Its really simple to **calculate weight of steel** in meter/kg by diameter in millimeter, just **divide** the **square of diameter** by **162**.

What is the formula of steel weight calculation? **Formula for per unit weight of steel in meter =** **D ^{2}/162**.

What is **162** in steel weight calculation? **162 **is derived constant value that is used to find the per unit meter weight of steel.

**Steel bar weight per meter calculation of 12mm dia steel?**

- Simply take square of diameter of steel bar in
**millimeter**and divide by**162**. It will give the Weight of per steel in meter. - Steel bar= 12mm dia
- weight = (12)
^{2}Ã· 162 - w.t = 144Ã·162
- weight of
**12mm**steel bar per meter=**0.888kg/m**

with this formula you can get per meter weight of any steel bar. To get the total weight simply multiply **0.889** with total length of steel in meters.

Dia of bar in Millimeter | Weight of Per meter bar |

6 mm | 0.22 kg/meter |

10 mm | 0.62 kg/meter |

12 mm | 0.89 kg/meter |

16 mm | 1.58 kg/meter |

20 mm | 2.469 kg/meter |

25 mm | 3.585 kg/meter |

Read also quantity of plaster material calculation.

### Unit weight of steel bar calculation (by dia in inches):

Following are **steel bar weight per foot calculation** formula and method. Simple just **multiply** the **square of diameter** with **1.21**, you will get **weight of per foot steel bar**.

**Formula for per unit weight of steel in foot =** **D ^{2}** x

**1.21**

- Simply take square of diameter of steel bar in
**inches**and multiply by**1.21**. It will give the weight of steel in feet. - Steel bar = 0.5 inch (4 sooter)
- w.t = (0.5)
^{2}x 1.21 - w.t = 0.25 x 1.21
- Weight of
**0.5 inch**(4 sooter) bar per foot =**0.302kg/ft**

Weight of **0.75 inch** (6 sooter) bar per foot =0.75^{2} Ã— 1.21 = **0.680kg/ft**

with this formula you can get per foot weight of any steel bar. To get the total weight simply multiply **0.302** with total length of steel in feet.

Bar no or Sooter | Weight of per foot bar |

#3 (0.375″) | 0.170 kg/foot |

#4 (0.5″) | 0.302 kg/foot |

#6 (0.75″) | 0.680 kg/foot |

“8 (1”) | 1.21 kg/foot |

Read also Concrete calculation.

### Weight of steel bars per foot: (**by bar no**):

If you want to calculate **weight of steel bars per foot** by **sooter** or by **bar number**. Simply **divide** the **square of diameter** with **52.91**.

**Formula for per unit weight of steel in foot ****=** **D ^{2}** Ã·

**52.91**

Steel bar = #3 , #4 , #6 , #8 (This is the number of steel bar or bar size in sooter)

Take the bar size in **sooter** or as a **bar number**.

**Lets take #4 bar**- Weight =
**4**^{2}Ã· 52.91 - weight of
**#4 steel bar**per foot =**0.302 kg/ft**.

**Lets take #6 bar**- W.t =
**6**^{2}Ã· 52.91 - weight of
**#6 steel bar**per foot =**0.680 kg/ft**.

### Weight of steel per square foot:

Per square foot concrete contain **1.21 kg** of steel if center to center spacing is **6″**. if you want to calculate the steel for patio or slab, just calculate area and multiply with 1.21.