TMT (Thermo-Mechanically Treated) bars are essential materials in construction projects. They provide strength, durability and stability to buildings. Knowing the weight of different TMT bar sizes helps in proper planning and budgeting. TMT Bars weight varies based on the diameter such as 8mm, 10mm, 12mm, 20mm, 25mm, 32mm. This allows the builders to choose the right size of TMT Bars for their construction projects. In this blog, we have given the complete information on TMT bars weight along with a clear TMT Bars weight chart.
TMT Bars Weight Chart (Based on Diameter)
| Diameter (mm) | Weight Per Metre (kg) | Weight Per Foot (kg) |
| 8 mm | 0.395 | 0.12 |
| 10 mm | 0.617 | 0.188 |
| 12 mm | 0.888 | 0.271 |
| 16 mm | 1.578 | 0.481 |
| 20 mm | 2.467 | 0.752 |
| 25 mm | 3.853 | 1.174 |
| 32 mm | 6.313 | 1.925 |
Note: Values based on the weight formula and standard industry practice
8mm TMT Bar Weight
The 8mm TMT bar is the lightest option available. It weighs 0.395 kg per meter. Here are important details about this size:
- One 12-meter bar weighs approximately 4.74 kg
- Typically used in non-load-bearing structures and small slabs
- Ideal for staircases, railings, and boundary walls
- Ten bars are bundled together, with bundle weight around 47 kg
- Best suited for residential construction and light-duty applications
10mm TMT Bar Weight
The 10mm TMT bar is commonly used in residential projects. It weighs 0.617 kg per meter. Key features include:
- One 12-meter bar weighs approximately 7.40 kg
- Used for slab reinforcements and roof construction
- Suitable for lintels and medium-load structures
- Seven bars form one bundle, weighing around 50 kg
- Provides good balance between strength and flexibility
12mm TMT Bar Weight
The 12mm TMT bar is widely used in construction. It weighs 0.888 kg per meter. Important points are:
- One 12-meter bar weighs approximately 10.66 kg
- Commonly used for beams, columns, and load-bearing slabs
- Ideal for both residential and commercial buildings
- Five bars make one bundle, weighing around 52 kg
- Offers excellent strength for heavy-duty construction work
20mm TMT Bar Weight
The 20mm TMT bar is designed for heavy structures. It weighs 2.470 kg per meter. Details include:
- One 12-meter bar weighs approximately 29.64 kg
- Used in high-rise buildings and industrial structures
- Suitable for heavy-load beams and large columns
- Provides robust reinforcement for bridges and complex projects
- Essential for structures requiring high tensile strength
25mm TMT Bar Weight
The 25mm TMT bar is used for critical structural elements. It weighs 3.850 kg per meter. Key information:
- One 12-meter bar weighs approximately 46.20 kg
- Used in foundation work of tall buildings
- Ideal for heavy infrastructure and industrial projects
- Provides maximum strength for critical load-bearing elements
- Essential for large-scale commercial and industrial construction
32mm TMT Bar Weight
The 32mm TMT bar is the heaviest commonly used size. It weighs 6.310 kg per meter. Important features are:
- One 12-meter bar weighs approximately 75.72 kg
- Reserved for extreme load-bearing applications
- Used in dams, bridges, and massive industrial structures
- Provides superior strength for heavy foundations
- Ideal for infrastructure projects requiring maximum durability
Calculation Formula of TMT Bars Weight
You can calculate the weight of any TMT bar using this simple formula:
Formula (Per Meter):
Weight (kg/m) = D² ÷ 162
Where:
- D = Diameter of the bar in millimeters (mm)
- 162 = Standard constant for steel
Formula (For Custom Length):
Weight (kg) = D² × L ÷ 162
Where:
- D = Diameter of the bar in millimeters (mm)
- L = Length of the bar in meters (m)
Alternative Formula:
Weight (kg/m) = D² × 0.00617
This formula works for all TMT bar sizes and helps in quick weight estimation for your construction projects.
SSI TMT Bars – Standard Weight, Piece Weight & Bundle Details
SSI TMT Bars are manufactured as per IS 1786 standards with controlled weight tolerance, ensuring consistent strength, safety, and site-ready performance.
In the below-given table, we have provided the accurate weight specifications of SSI TMT Bars to help engineers, builders, and contractors plan material requirements with confidence.
| Size (mm) | Std. Wt. Min (Kg/Mtr.) | Std. Wt. Max (Kg/Mtr.) | Piece Wt. Min (12.200 Mtr.) | Piece Wt. Max (12.200 Mtr.) | Bundle Wt. Min (Kg) | Bundle Wt. Max (Kg) | Pieces in Bundle |
| 8 | 0.37 | 0.39 | 4.514 | 4.758 | 45.14 | 47.58 | 10 |
| 10 | 0.58 | 0.61 | 7.076 | 7.442 | 49.532 | 52.094 | 7 |
| 12 | 0.85 | 0.88 | 10.37 | 10.736 | 51.85 | 53.68 | 5 |
| 16 | 1.52 | 1.56 | 18.544 | 19.032 | 55.632 | 57.096 | 3 |
| 20 | 2.43 | 2.46 | 29.646 | 30.012 | 59.292 | 60.024 | 2 |
| 25 | 3.78 | 3.84 | 46.116 | 46.848 | 46.116 | 46.848 | 1 |
| 28 | 4.7 | 4.81 | 57.34 | 58.682 | 57.34 | 58.682 | 1 |
| 32 | 6.2 | 6.3 | 75.64 | 76.86 | 75.64 | 76.86 | 1 |
Get All Different Sizes of BIS-Certified TMT Bars!
SSI TMT Bars offers a complete range of high-quality TMT bars in all standard sizes. Our products are BIS-certified and meet international quality standards. We provide TMT bars in 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 28mm, and 32mm sizes to meet every construction need. Whether you are building a small house or a large commercial project, we have the right size for your requirements. Our TMT bars are manufactured using advanced technology to ensure superior strength, ductility, and durability.
FAQs
What is the weight of an 8mm TMT bar per meter?
The weight of an 8mm TMT bar is 0.395 kg per meter. For a standard 12-meter bar, the total weight is approximately 4.74 kg.
How do you calculate TMT bar weight?
TMT bar weight is calculated using the formula: Weight (kg/m) = D² ÷ 162, where D is the diameter in millimeters. This formula gives the weight per meter of the bar.
Which TMT bar size is best for residential construction?
For residential construction, 8mm to 12mm TMT bars are commonly used. The 10mm bar is ideal for slabs, while 12mm bars are perfect for beams and columns.
What is the difference between 20mm and 25mm TMT bar weight?
A 20mm TMT bar weighs 2.470 kg per meter, while a 25mm bar weighs 3.850 kg per meter. The 25mm bar is heavier and used for larger structural elements.
How many 12mm TMT bars are in one bundle?
Typically, one bundle of 12mm TMT bars contains 5 rods. The total bundle weight is approximately 52 kg.
Where are 32mm TMT bars used?
The 32mm TMT bars are used in heavy infrastructure projects like dams, bridges, industrial buildings, and massive foundations that require extreme load-bearing capacity.
What is the standard length of TMT bars?
The standard length of TMT bars is 12 meters or 40 feet. This length is followed across the industry for all diameter sizes.
Why is knowing TMT bar weight important?
Knowing TMT bar weight helps in accurate material estimation, budget planning, proper ordering of materials, and ensuring structural safety and compliance with building standards.