TMT Weight Chart in KG: TMT Bar Weight Per Meter, Formula and Size Table
TMT Weight Chart in KG: TMT Bar Weight Per Meter, Formula and Size Table
TMT bars are one of the most important materials in construction. Whether the project is a house, commercial building, slab, column, beam, bridge, boundary wall or industrial structure, the quantity of TMT steel directly affects project cost and structural planning.
That is why a TMT weight chart is useful for buyers, contractors, engineers and site teams. It helps calculate the weight of each TMT bar size in kg per meter, estimate total steel requirement, plan transport, compare supplier quotations and avoid material shortage at site.
In this guide, you will find the complete TMT bar weight chart in kg, the standard formula for calculating TMT weight, examples for common sizes such as 8mm, 10mm, 12mm, 16mm, 20mm and 25mm, and practical tips for buying TMT bars.
What is a TMT Weight Chart?
A TMT weight chart is a table that shows the approximate weight of TMT bars based on their diameter. The most commonly used value is kg per meter, which means how much one meter of a particular TMT bar size weighs.
For example, a 12mm TMT bar weighs approximately 0.89 kg per meter, while a 16mm TMT bar weighs approximately 1.58 kg per meter. This difference matters because larger diameter bars increase total steel weight, total cost and transport load.
TMT Bar Weight Formula
Where D is the diameter of the TMT bar in mm. The result is approximate weight in kg per meter.
Example for 12mm TMT bar: 12 x 12 / 162 = 0.89 kg/m. So, one meter of 12mm TMT bar weighs around 0.89 kg.
Complete TMT Weight Chart in KG
| TMT Bar Diameter | Weight Per Meter | Weight Per 12 Meter Bar |
|---|---|---|
| 6mm | 0.22 kg/m | 2.67 kg |
| 8mm | 0.40 kg/m | 4.74 kg |
| 10mm | 0.62 kg/m | 7.41 kg |
| 12mm | 0.89 kg/m | 10.67 kg |
| 16mm | 1.58 kg/m | 18.96 kg |
| 20mm | 2.47 kg/m | 29.63 kg |
| 25mm | 3.86 kg/m | 46.30 kg |
| 28mm | 4.84 kg/m | 58.07 kg |
| 32mm | 6.32 kg/m | 75.85 kg |
| 36mm | 8.00 kg/m | 96.00 kg |
| 40mm | 9.88 kg/m | 118.52 kg |
Note: Values are approximate and based on the standard D^2/162 formula. Actual weight may vary slightly due to manufacturing tolerances.
Why TMT Weight Chart is Important
Accurate Steel Costing
TMT bars are usually sold by weight. If you know the weight per meter and total length required, you can calculate total kg or metric tonnes before placing an order.
Better Site Planning
Contractors can plan how much steel is required for slabs, beams, columns and foundations. This reduces delays caused by shortage or excess material.
Transport and Loading Planning
Knowing total TMT weight helps plan truck capacity, unloading manpower and storage space at site.
Quote Comparison
When suppliers quote by kg or tonne, the TMT weight chart helps verify whether the quantity and pricing are correct.
Common TMT Bar Sizes and Uses
8mm TMT Bar
8mm TMT bars are commonly used for stirrups, rings, small residential work and light reinforcement.
10mm TMT Bar
10mm bars are used in residential construction, slabs, small beams and general reinforcement.
12mm TMT Bar
12mm is one of the most widely used sizes in house construction. It is used in slabs, beams, columns and footings depending on structural design.
16mm TMT Bar
16mm bars are used where higher strength is required, especially in beams, columns and medium-load structures.
20mm and 25mm TMT Bars
These sizes are used in heavy construction, commercial projects, industrial structures, bridges and high-load structural members.
How to Calculate Total TMT Weight
Use this formula: Total Weight = Weight per meter x Length x Quantity.
Example: If you need 50 bars of 12mm TMT, each 12 meters long: 0.89 x 12 x 50 = 534 kg. So, the total approximate weight is 534 kg.
How to Convert TMT Bar Weight to Tonnes
To convert kg to tonnes: Tonnes = Total kg / 1000. Example: 534 kg / 1000 = 0.534 MT. This is useful when suppliers quote steel prices per metric tonne.
TMT Bar Buying Tips
- Correct diameter as per structural drawing
- Grade such as Fe 500, Fe 500D, Fe 550 or Fe 550D
- Brand and manufacturing standard
- Bendability and rib pattern
- Rust condition and storage quality
- Actual weight and billing method
- Delivery location and unloading arrangement
Buy TMT Bars from Vishwageeta Ispat
Vishwageeta Ispat supplies TMT bars and structural steel products for residential, commercial and industrial construction. If you need TMT bars in different sizes, we can help calculate quantity, weight and pricing based on your project requirement.
FAQs
What is the formula for TMT bar weight?
The standard formula is D^2 / 162, where D is the diameter of the bar in mm. The result gives approximate weight in kg per meter.
What is the weight of 12mm TMT bar?
12mm TMT bar weighs approximately 0.89 kg per meter. A 12 meter bar weighs around 10.67 kg.
What is the weight of 16mm TMT bar?
16mm TMT bar weighs approximately 1.58 kg per meter. A 12 meter bar weighs around 18.96 kg.
What is the weight of 8mm TMT bar?
8mm TMT bar weighs approximately 0.40 kg per meter. A 12 meter bar weighs around 4.74 kg.
Why is TMT bar weight important?
TMT bar weight is important for calculating material cost, total steel requirement, transport load, site storage and project planning.