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**What Is Rebar Size and Rebar Diamters?**

The **Rebars **are** steel reinforcement bars** that are **used with concrete** to improve the **tensile** strength of** concrete**. Because, it is a known fact that **concrete is very weak** in handling **tension force**, but is strong in **handling concrete **forces which are **acting on** any structure.

There are various **Reabr Size and Rebar Diameter** Used in construction as per **work and conditions.**

**Steel **is the only material **used as Rebar** in concrete because **its elongatio**n at high **temperature is nearly** the same as **that of concrete.**

## Types of Rebars

**1. Carbon Steel Rebars**

**The carbon steel rebars** are the most commonly **used steel bars** used **in construction** **and it is **sometimes also **called “Black Rebar”.** But, one of the** biggest drawbacks** of this rebar **is that it is easily** catching corrosion **compared** to other** types of rebar.**

**Therefore,** It is not used in **an area **that is subjected to** high humidity** and in a structure that is **continuously** in contact** with water.**

**But, It is** one of the** best rebars t**o be used **in construction** other than** water contact.**

**2. Welded Wire Fabric**

It is m**anufactured** by electrically** welding a series** of steel wires **arranged at a right angle. **It is mostly used for **ground-level slabs **where the ground is** properly compacted** and leveled.

**These types of rebars** are used for **box culverts,** road pavement, **drainage structures**, and small concrete **canal construction work.**

**3. Sheet-Metal Reinforcing Bars**

**It is manufactured** from annealed **sheet steel **pieces and bent **in corrugated** shape with **1/6 inch** deep holes **punched **at a specified **distance.**

**These bears** are mainly **used for roof **construction,** floor slab,** and stairs **formation work.**

**4. Epoxy-Coated Rebars**

**Expoxy Coated Rebars** is one of the** expensive types of rebars** that are used in an** area **where the structure **keeps continuous** contact with **seawater and high** humidity area.

**It coating** must be** done properly** for the best result **otherwise** it is also **liable to corrosion.**

**5. European Rebars**

**The European Steel Rebars** are generally **manufactured** from manganese mineral **material **which is **having** the property of **easily bending.**

**These types of rebars** are not suggested** to be used in extreme **weather conditions such as **earthquake**-prone zones, **hurricanes, **and rainstorms areas.

### 6. **Stainless Steel Rebars**

**Stainless steel rebars** are used as **alternative rebar** with carbon **steel reinforcement bars. **Stainless steel rebars are** corrosion resistance **coating on it which is the **best option **in an area that **has corrosion problems.**

**But, Its cost** is nearly **eight times** the cost of** carbon steel rebars.**

### 7. **Galvanized Rebars**

**These rebars **are most suitable for **making strong** structures that are **supposed to expose **in an area of **high humid conditions. **Galvanized Rebars are** 40 times more **corrosion **resistant compared** to normal **carbon steel rebars.**

**Read More: How Many Bags of Concrete Do I Need For 10×10 Slab**

**Different Types of Rebar and Their Size**s

- 3 rebar diameter
- 4 rebar diameter
- 5 rebar diameter
- 6 rebar diameter
- 7 rebar diameter
- 8 rebar diameter
- 9 rebar diameter
- 10 rebar diameter
- 11 rebar diameter
- 14 rebar diameter
- 18 rebar diameter

**#3 Rebar Size and Diameter**

**3 Rebar diameters** are made from **carbon steel** composite materials. **It is mostly** used for patio work, **driveway construction**, road work, and** highway** construction work.

**3 Rebar **is popularly known as **“10 mm”** diameter **rebar,**

**3 Rebar Diameter:**

#3 Rebar diameter in the metric system is 10 mm.

#3 Rebar nominal diameter in Inch is 0.375 inch

#3 Rebar nominal diameter in mm is 9.525 mm

**3 Rebar Weight per unit length (lb/ft):**

#3 Rebar unit weight per length is 0.376 lb/ft

#3 Rebar unit weight per length is 0.561 kg/m

**3 Rebar C/S Area:**

#3 Rebar Nominal Area in Inch is 0.1 inch^{2}

#3 Rebar Nominal Area in mm is 71 mm^{2}

**#4 Rebar Size and Diameter**

**4 Rebar diameter** is made from a **sturdy composite** of carbon** steel.** It is mostly **used for **commercial **and residential **construction **work.**

4 Rebar is popularly known as “13 mm” diameter rebar,

**4 Rebar Diameter:**

#4 rebar diameter in the metric system is 13 mm.

#4 rebar nominal diameter in Inch is 0.50 inch (1/2 In.)

#4 rebar nominal diameter in mm is 12.70 mm

**4 Rebar Weight per unit length (lb/ft):**

#4 Rebar unit weight per length is 0.668 lb/ft

#4 Rebar unit weight per length is 0.996 kg/m

**4 Rebar C/S Area:**

#4 Rebar Nominal Area in Inch is 0.2 inch^{2}

#4 Rebar Nominal Area in mm is 129 mm^{2}

**#5 Rebar Size and Diameter**

**5 Rebar diameter** is made from** carbon steel composite** materials. It is **mostly used for **precast **components construction** which is used for the canal,** bridge, and road **construction.

5 Rebar is popularly known as “16 mm” diameter rebar,

**5 Rebar Diameter:**

#5 rebar diameters in the metric system is 16 mm.

Its nominal diameter in Inch is 0.625 inches (5/8 In.)

Its nominal diameter in mm is 15.875 mm

**5 Rebar Weight per unit length (lb/ft):**

#5 Rebar unit weight per length is 1.043 lb/ft

#5 Rebar unit weight per length is 1.556 kg/m

**5 Rebar C/S Area:**

#5 Rebar Nominal Area in Inch is 0.31 inch^{2}

#5 Rebar Nominal Area in mm is 200 mm^{2}

**#6 Rebar Size and Diameter**

**6 Rebar diameters** are made from** carbon steel composite** materials. It is mostly used for heavy** foundation and footing **construction.

**6 Rebar **is popularly known as **“19 mm” diameter rebar,**

**6 Rebar Diameter:**

#6 rebar diameters in the metric system is 19 mm.

Its nominal diameter in Inch is 0.750 inches (3/4 In.)

Its nominal diameter in mm is 19.05 mm

**6 Rebar Weight per unit length (lb/ft):**

#6 Rebar unit weight per length is 1.502 lb/ft

#6 Rebar unit weight per length is 2.24 kg/m

**6 Rebar C/S Area:**

#6 Rebar Nominal Area in Inch is 0.44 inch^{2}

#6 Rebar Nominal Area in mm is 284 mm^{2}

**#7 Rebar Size and Diameter**

**7 Rebar diameters** are made from** carbon steel composite** materials. It is mostly used for medium to** heavy concrete construction work.**

**7 Rebar **is popularly known as **“22 mm”** diameter rebar,

**7 Rebar Diameter:**

#7 rebar diameters in the metric system is 22 mm.

Its nominal diameter in Inch is 0.875 inches (3/4 In.)

Its nominal diameter in mm is 22.225 mm

**7 Rebar Weight per unit length (lb/ft):**

#7 Rebar unit weight per length is 2.044 lb/ft

#7 Rebar unit weight per length is 3.049 kg/m

**7 Rebar C/S Area:**

#7 Rebar Nominal Area in Inch is 0.6 inch^{2}

#7 Rebar Nominal Area in mm is 387 mm^{2}

### #**8 Rebar Size and Diameter**

**8 Rebar diameter **is made from carbon** steel composite materials.** It is mostly used in high**-strength** construction **work.**

**8 Rebar **is popularly known as** “25 mm” diameter rebar,**

**8 Rebar Diameter:**

#8 rebar diameters in the metric system is 25 mm.

8 rebar nominal diameter in Inch is 1.000 inch

3 rebar nominal diameter in mm is 25.40 mm

**8 Rebar Weight per unit length (lb/ft):**

#8 Rebar unit weight per length is 2.67 lb/ft

#8 Rebar unit weight per length is 3.982 kg/m

**8 Rebar C/S Area:**

#8 Rebar Nominal Area in Inch is 0.79 inch^{2}

#8 Rebar Nominal Area in mm is 509 mm^{2}

**#9 Rebar Size and Diameter**

**9 Rebar diameters** are made from **carbon steel composite** materials. It is mostly used in **retaining walls, **abutments,** columns,** and beam **construction.**

9 **Rebar **is popularly known as **“29 mm”** **diameter rebar**.

**9 Rebar Diameter:**

#9 rebar diameters in metric system is 29 mm.

9 rebar nominal diameter in Inch is 1.128 inch

9 rebar nominal diameter in mm is 28.65 mm

**9 Rebar Weight per unit length (lb/ft):**

#9 Rebar unit weight per length is 3.40 lb/ft

#9 Rebar unit weight per length is 5.071 kg/m

**9 Rebar C/S Area:**

#9 Rebar Nominal Area in Inch is 1.00 inch^{2}

#9 Rebar Nominal Area in mm is 645 mm^{2}

**#10 Rebar Size and Diameter**

**10 Rebar diameter** is made from** carbon steel** composite** materials.** It is mostly used for heavy-**duty construction work.**

**10 Rebar **is popularly known as** “32 mm” diameter rebar,**

**10 Rebar Diameter:**

#10 rebar diameter in the metric system is 32 mm.

10 rebar nominal diameter in Inch is 1.27 inch

10 rebar nominal diameter in mm is 32.26 mm

**10 Rebar Weight per unit length (lb/ft):**

#10 Rebar unit weight per length is 4.303 lb/ft

#10 Rebar unit weight per length is 6.418 kg/m

**10 Rebar C/S Area:**

#10 Rebar Nominal Area in Inch is 1.27 inch^{2}

#10 Rebar Nominal Area in mm is 819 mm^{2}

**#11 Rebar Size and Diameter**

**11 Rebar diameter **is made from **carbon **steel **composite materials**. It is mostly used for high-quality **construction work.**

**11 Rebar** is popularly known as **“36 mm” diameter rebar,**

**11 Rebar Diameter:**

#11 rebar diameters in the metric system is 36 mm.

11 rebar nominal diameter in Inch is 1.41 inch

11 rebar nominal diameter in mm is 35.81 mm

**11 Rebar Weight per unit length (lb/ft):**

#11 Rebar unit weight per length is 5.313 lb/ft

#11 Rebar unit weight per length is 7.924 kg/m

**11 Rebar C/S Area:**

#11 Rebar Nominal Area in Inch is 1.56 inch^{2}

#11 Rebar Nominal Area in mm is 1006 mm^{2}

**#14 Rebar Size and Diameter**

**14 Rebar diameter** is made from carbon steel composite materials. It is mostly used for tall buildings, parking structures, bridges, docks, and industrial facilities.

**14 Rebar **is popularly known as** “43 mm” diameter rebar,**

**14 Rebar Diameter:**

#14 rebar diameters in the metric system is 43 mm.

14 rebar nominal diameter in Inch is 1.693 inch

14 rebar nominal diameter in mm is 43 mm

**14 Rebar Weight per unit length (lb/ft):**

#14 Rebar unit weight per length is 7.65 lb/ft

#14 Rebar unit weight per length is 11.41 kg/m

**11 Rebar C/S Area:**

#14 Rebar Nominal Area in Inch is 2.25 inch^{2}

#14 Rebar Nominal Area in mm is 1452 mm^{2}

**18 Rebar Size and Diameter**

**18 Rebar diameter** made from carbon steel **composite materials. **It is mostly used for bridges and **construction projects** in marine **environments.**

**18 Rebar **is popularly known as **“57 mm” diameter rebar**.

**18 Rebar Diameter:**

**#18 rebar diameter** in metric system is 57 mm.

18 rebar nominal diameter in Inch is 2.257 inch

18 rebar nominal diameter in mm is 57.33 mm

**18 Rebar Weight per unit length (lb/ft):**

#18 Rebar unit weight per length is 13.6 lb/ft

#18 Rebar unit weight per length is 20.284 kg/m

**18 Rebar C/S Area:**

#18 Rebar Nominal Area in Inch is 4.00 inch^{2}

#18 Rebar Nominal Area in mm is 2581 mm^{2}

**Read More: How Many Bags Of Concrete In A Yard | How Many Bags of Concrete Do I Need**

## Rebar Size Chart and Rebar Diameter Chart

Imperial Bar Size | Weight per unit length (lb/ft) | Mass per unit length (kg/m) | Nominal Diameter (in) | Nominal Diameter (mm) | Nominal Area(in2) | Nominal Area (mm2) |

#3 | 0.376 | 0.561 | 0.375 | 9.525 | 0.11 | 71 |

#4 | 0.668 | 0.996 | 0.500 | 12.7 | 0.2 | 129 |

#5 | 1.043 | 1.556 | 0.625 | 15.875 | 0.31 | 200 |

#6 | 1.502 | 2.24 | 0.750 | 19.05 | 0.44 | 284 |

#7 | 2.04 | 3.049 | 0.87 | 22.225 | 0.60 | 387 |

#8 | 2.67 | 3.982 | 1.000 | 25.4 | 0.79 | 509 |

#9 | 3.4 | 5.071 | 1.128 | 28.65 | 1 | 645 |

#10 | 4.303 | 6.418 | 1.27 | 32.26 | 1.27 | 819 |

#11 | 5.313 | 7.924 | 1.41 | 35.81 | 1.56 | 1006 |

#14 | 7.65 | 11.4 | 1.693 | 43 | 2.25 | 1452 |

#18 | 13.6 | 20.284 | 2.257 | 57.33 | 4 | 2581 |

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