8mm TMT Bar Price, Uses, Grades & Buying Guide (2026)

Buying TMT bars is not just about comparing prices. The right size, grade, quality and application all matter when planning a construction project.

The 8mm TMT bar is widely used for various reinforcement applications, including stirrups, ring ties, slabs and light structural work. However, understanding its specifications and choosing the appropriate grade is important before making a purchase.

In this guide, we explore 8mm TMT bar price, common uses, available grades, specifications and important buying factors for 2026.

What Is an 8mm TMT Bar?

TMT stands for Thermo-Mechanically Treated. A TMT bar is a ribbed reinforcement bar used in reinforced concrete. The “8mm” refers to its nominal diameter.

TMT bars have a hard outer surface and a softer, ductile core, which helps them handle both load and structural movement. The ribs on the surface improve bonding with concrete.

The 8mm bar is one of the thinner standard sizes. It is mainly used for secondary reinforcement such as stirrups and distribution bars, not as the main load-bearing steel in heavy structures.  

8mm TMT Bar Weight Per Meter

The weight of an 8mm TMT bar is approximately 0.395 kg per meter, or about 0.12 kg per foot.

This comes from the standard formula for steel bars (see the calculation section below). A standard 12-meter bar weighs about 4.74 kg, and a bundle of 10 such bars weighs about 47.4 kg.

Actual weight can vary slightly because IS 1786 permits a tolerance on nominal mass. Always confirm the weight with your supplier’s test and billing documents.

8mm TMT Bar Weight Chart

The 12-meter length is the most common in the market. Other lengths may be available depending on the manufacturer and order.

How to Calculate 8mm TMT Bar Weight?

The commonly used formula is:

Weight per meter (kg) = D² ÷ 162

where D is the bar diameter in mm.

For an 8mm bar:

• D² = 8 × 8 = 64
• 64 ÷ 162 = 0.395 kg per meter

To find the weight of a full bar, multiply by its length:

• 0.395 × 12 m = 4.74 kg for a 12-meter bar

For any custom length, use Weight (kg) = D² × L ÷ 162, where L is the length in meters. This formula gives a theoretical weight. Actual bars may differ within the tolerance allowed by the standard.

How Many 8mm TMT Bars Are There in One Ton?

One ton is 1,000 kg. Dividing by the weight of one bar gives the approximate count:

One ton of 8mm TMT bars contains roughly 2,532 meters of steel (1,000 ÷ 0.395).

These are theoretical figures. The actual count depends on real bar weight and tolerance.

8mm TMT Bar Size and Dimensions

IS 1786 is the Indian Standard for high-strength deformed steel bars and wires used for concrete reinforcement. Bar size, mass and mechanical properties should align with this standard.

SSI TMT 8mm specification (12.2 m piece):

SSI TMT Bars are manufactured as per IS 1786 with controlled weight tolerance. This table uses 12.2 m pieces, so figures differ slightly from the 12 m values above.

8mm TMT Bar Price in India (2026)

TMT bar prices in India change often. They are usually quoted per kg or per ton and vary by city, brand, grade and market conditions. For this reason, a fixed price is unreliable. Always ask for a current quotation.

As an indicative guide, 2026 market rates have mostly been around ₹60–₹72 per kg (roughly ₹60,000–₹72,000 per ton). Premium brands typically price higher than secondary mills, and smaller sizes like 8mm may carry a slight premium over larger sizes.

You can estimate cost with this formula:

Cost = Weight × Rate per kg

Here is an illustration for one 12-meter bar (4.74 kg) at different rates. These are indicative rates only, not live market prices:

For bulk orders, multiply by the number of bars or work from the total weight in tons.

Factors Affecting 8mm TMT Bar Price

Several factors influence the price you are quoted:

• Raw material cost: Iron ore, scrap, sponge iron and billet prices.
• Grade: Higher grades such as Fe 550D may be priced differently from Fe 500.
• Brand and manufacturing quality: Process control and testing affect pricing.
• Order quantity: Bulk orders may attract better rates.
• Location and transport: Freight and local demand affect the final rate.
• GST: TMT bars fall under bars and rods of iron or non-alloy steel, and 18% GST is added to the base price. For details, 

read our TMT Bar HSN Code guide

Market demand: Demand usually rises in the post-monsoon construction season (October to March), which can push prices up.

Uses of 8mm TMT Bars in Construction

8mm TMT bars are mainly used for secondary and lighter reinforcement:

• Stirrups in beams: Holding main bars in position and resisting shear.
• Ring ties in columns: Confining the main vertical bars.
• Slab reinforcement: Distribution bars and light slabs.
• Lintels and sunshades: Light structural elements.
• Residential construction: Houses and small buildings, as specified by the structural designer.
• Binding and spacer work: Supporting reinforcement cages.

The bar diameter and spacing for any project should follow the structural design and the advice of a qualified engineer.

8mm TMT Bar Grades: Fe 500, Fe 500D, Fe 550 and Fe 550D

IS 1786 covers several grades. The number after “Fe” indicates the specified minimum yield or proof stress in N/mm². The “D” designation indicates enhanced ductility, meaning higher elongation requirements.

Grade affects strength and ductility, not the bar’s nominal diameter or theoretical weight. Choose the grade according to the structural design.

To explore options, see SSI TMT’s Fe 550D TMT Bars 8mm TMT Bar vs 10mm TMT Bar vs 12mm TMT Bar

Thicker bars carry more load and weigh more. The right size depends on the structural design. For more sizes,

See our TMT Bar Weight Guide

How to Choose the Right 8mm TMT Bar?

Consider the following before selecting a bar:

• Structural requirement: Follow the engineer’s design for diameter and spacing.
• Grade: Select Fe 500, Fe 500D, Fe 550 or Fe 550D as the design requires.
• Standard compliance: Confirm the bar meets IS 1786.
• Ductility: Consider “D” grades where the design calls for higher elongation.
• Surface quality: Look for uniform ribs, with no cracks or rust.
• Manufacturer quality controls: Prefer suppliers who provide test certificates.
• Total weight needed: Estimate quantity using the weight chart above.

Also read: How to Choose the Right TMT Bars for Your Construction Purposes 

What to Check When Buying 8mm TMT Bars?

Before finalising an order, verify:

• Brand marking and rolled identification on the bar
• Grade and nominal diameter
• Compliance with IS 1786 and BIS marking where applicable
• Test certificates and batch details
• Straightness and uniform rib pattern
• Actual weight against theoretical weight
• Invoice details: description, grade, size, quantity, HSN code, GST and GSTIN
• Delivery length and tolerance

If anything is unclear, ask the supplier before accepting the material.

Looking for Quality 8mm TMT Bars?

The right reinforcement steel can make a difference in construction planning. Before purchasing, consider the bar size, grade, weight, quality and applicable standards.

For 8mm TMT bars suitable for your project requirements, explore SSI TMT Bars and speak with our team for further information.