Introduction
Knowing the 10 mm TMT bar weight is important when estimating the quantity of reinforcement steel required for a construction project. Engineers, contractors, builders and homeowners commonly use TMT bar weight calculations to estimate material requirements, transportation needs and project costs.
A 10 mm TMT bar is widely used in reinforced concrete construction, depending on the structural design and engineer’s specifications.
The theoretical unit weight of a 10 mm diameter steel bar is approximately 0.617 kg per metre. Therefore, a standard 12-metre bar has a theoretical weight of approximately 7.40 kg.
In this guide, we explain the 10 mm TMT bar weight per metre, per foot and per 12-metre bar, along with the simple formula used to calculate TMT bar weight.
What Is the Weight of a 10 mm TMT Bar?
The theoretical weight of a 10 mm TMT bar is approximately 0.617 kg per metre.
Using this value:
- 1 metre: ~0.617 kg
- 1 foot: ~0.188 kg
- 6 metres: ~3.70 kg
- 12 metres: ~7.40 kg
These are theoretical values based on the nominal diameter and standard steel density. Actual supplied weight can vary within the applicable tolerances and manufacturing standards.
10 mm TMT Bar Weight Chart
| Length of 10 mm TMT Bar | Approximate Weight |
|---|---|
| 1 metre | 0.617 kg |
| 2 metres | 1.234 kg |
| 3 metres | 1.851 kg |
| 4 metres | 2.468 kg |
| 5 metres | 3.085 kg |
| 6 metres | 3.702 kg |
| 10 metres | 6.170 kg |
| 12 metres | 7.404 kg |
For quick estimation, you can use 0.617 kg/m as the theoretical unit weight of a 10 mm steel bar.
How to Calculate 10 mm TMT Bar Weight?
A commonly used theoretical formula for calculating steel bar weight is:
Weight per metre = D² / 162
Where:
D = Diameter of the bar in millimetres
162 = Constant derived from steel density and unit conversion
For a 10 mm TMT bar:
Weight = 10² / 162
= 100 / 162
≈ 0.617 kg/m
Therefore, the theoretical unit weight of a 10 mm TMT bar is approximately 0.617 kg per metre.
How Much Does a 10 mm TMT Bar Weigh Per Foot?
Since one metre equals approximately 3.281 feet:
0.617 ÷ 3.281 ≈ 0.188 kg/ft
Therefore, a 10 mm TMT bar weighs approximately 0.188 kg per foot theoretically.
This value can be useful for smaller quantity calculations and estimation work.
How Much Does a 12-Metre 10 mm TMT Bar Weigh?
The standard calculation is:
0.617 × 12 = 7.404 kg
Therefore, a 12-metre 10 mm TMT bar has a theoretical weight of approximately 7.40 kg.
For actual procurement, the supplied weight should be checked against the applicable product standards and manufacturer’s documentation.
How Many 10 mm TMT Bars Are There in One Tonne?
A theoretical estimate can be calculated as follows:
1 tonne = 1,000 kg
1,000 ÷ 7.404 ≈ 135.1 bars
Therefore, approximately 135 numbers of 12-metre 10 mm TMT bars correspond to one metric tonne on a theoretical-weight basis.
The actual number can vary depending on the actual supplied weight and permissible manufacturing tolerances.
Why Is 10 mm TMT Bar Weight Important?
1. Material Estimation
Weight calculations help contractors estimate how much steel is required for a project.
2. Cost Estimation
Steel is commonly purchased by weight. Knowing the approximate weight of each bar makes it easier to estimate material costs.
3. Transportation Planning
The total weight of reinforcement steel affects transportation and handling requirements.
4. Inventory Management
Contractors can use unit-weight calculations to monitor stock and estimate remaining quantities.
5. Project Planning
Accurate reinforcement estimates help improve material planning and reduce unnecessary wastage.
Where Are 10 mm TMT Bars Used?
The use of a particular TMT bar diameter depends on the structural drawings and engineer’s specifications.
10 mm reinforcement may be used in applications such as:
- Slabs
- Beams
- Columns
- Residential buildings
- Commercial structures
- Footings
- Reinforcement meshes
- Other reinforced concrete applications
The appropriate diameter, grade and quantity should always be determined by the structural design rather than selected solely based on bar weight.
10 mm TMT Bar Weight vs Other Common Sizes
Understanding different bar diameters can help during reinforcement estimation.
| TMT Bar Diameter | Approx. Theoretical Weight per Metre |
|---|---|
| 8 mm | 0.395 kg |
| 10 mm | 0.617 kg |
| 12 mm | 0.889 kg |
| 16 mm | 1.580 kg |
| 20 mm | 2.469 kg |
| 25 mm | 3.858 kg |
| 32 mm | 6.321 kg |
The values above are theoretical unit weights calculated using the standard diameter-based formula.
Factors That Can Affect Actual TMT Bar Weight
The theoretical weight is useful for estimation, but actual supplied weight can differ.
Important factors include:
Diameter Tolerance
The actual dimensions of a manufactured bar can vary within the permissible tolerance.
Length Tolerance
The actual length of individual bars may also have permissible variation.
Manufacturing Standards
Applicable standards specify requirements and permissible tolerances for reinforcement steel.
Production and Measurement
Actual bundle weight should be determined using appropriate weighing procedures when exact procurement quantities are required.
Agni Steels TMT Bars
Agni Steels manufactures TMT reinforcement steel for construction applications. The company’s TMT products are designed with attention to strength, ductility, dimensional consistency and concrete bonding.
When estimating the requirement for 10 mm TMT bars, theoretical weight calculations can be used as a starting point. For procurement, buyers should also refer to the manufacturer’s product specifications and applicable standards.
Frequently Asked Questions About 10 mm TMT Bar Weight
What is the weight of a 10 mm TMT bar per metre?
The theoretical weight of a 10 mm TMT bar is approximately 0.617 kg per metre.
What is the weight of a 10 mm TMT bar per foot?
A 10 mm TMT bar weighs approximately 0.188 kg per foot on a theoretical basis.
What is the weight of a 12-metre 10 mm TMT bar?
A 12-metre 10 mm TMT bar has a theoretical weight of approximately 7.40 kg.
How do I calculate 10 mm TMT bar weight?
Use the theoretical formula:
Weight per metre = D² / 162
For a 10 mm bar:
10² / 162 ≈ 0.617 kg/m
How many 10 mm TMT bars are in one tonne?
Based on a theoretical 12-metre bar weight of approximately 7.404 kg, one tonne corresponds to approximately 135 bars.
Is the actual 10 mm TMT bar weight always exactly 7.40 kg for 12 metres?
Not necessarily. The 7.40 kg figure is a theoretical value. Actual supplied weight can vary within applicable dimensional and mass tolerances.
Are 10 mm TMT bars suitable for all construction applications?
No. The required bar diameter and grade depend on the structural design. A qualified structural engineer should specify the reinforcement requirements for a project.
Conclusion
Understanding 10 mm TMT bar weight makes steel estimation easier for construction projects. The theoretical unit weight of a 10 mm TMT bar is approximately 0.617 kg per metre, while a 12-metre bar weighs approximately 7.40 kg theoretically.
The simple formula D²/162 can be used to estimate the theoretical unit weight of TMT bars of different diameters.
However, weight is only one factor when selecting reinforcement steel. Grade, strength, ductility, dimensional tolerances, applicable standards and manufacturer quality should also be considered.
For construction projects using 10 mm reinforcement, Agni Steels TMT bars can be evaluated based on the project’s structural requirements and applicable product specifications.