Mild Steel or MS flats are low-carbon steel. They are not alloy steels but a type of standard steel with low carbon. This makes them easy to work with, especially in the building of light structural works. Having access to a MS flat weight chart pdf therefore will make it convenient for you to calculate MS flat weight and buy the right quantity for your projects.

MS flats are flat strips or bars made out of mild steel. They are characterised by its rectangular cross-section and widely used in fabrication and frameworks. The standard MS flats length starts from 20 metres and are 3 metres in thickness. They are also easy to weld and strong. MS flats are available in different sizes. Sizes can vary based on the manufacturer and the sizes offered by them. Listed below are some of the popular MS flat bar sizes and the MS flat weight chart for it.

MS flat weight formula (quick answer)

Weight (kg) = Width × Thickness × Length × 7.85/1000

This formula helps you quickly calculate the weight of MS flat bars using standard steel density.

Example: A 50mm × 5mm MS flat with 10m length weighs 19.63 kg.

Also read: Unit weight of TMT bars – Learn to calculate for 8mm to 32mm

Common MS flat sizes (India)

Width: 12 mm to 100 mm

Thickness: 3 mm to 25 mm

Length: 6 meters (standard), also available in 3m and custom lengths.

Popular MS flat size combinations

Width (mm)	Thickness (mm)	Common use
20	5	Fabrication, grills.
25	5	Gates, frames.
25	10	Structural supports.
32	6	Industrial use.
50	6	Heavy fabrication.
75	10	Load-bearing structures.

Things to know

• Most MS flats in India follow IS standards (IS 1730/IS 2062)
• Sizes may vary slightly based on rolling mills
• Heavier thickness flats are used for structural work
• Lighter flats are used in fabrication and general applications

Tip: Always confirm size, tolerance, and weight with your supplier before purchase.

MS flat weight chart for 1m bars (length)

MS flat weight chart for 1m bars (all values represent weight per metre, calculated using standard steel density of 7850 kg/m³).

Width = 12mm

Thickness (mm)	Weight (kg/m)
5 mm	0.47
6 mm	0.57
8 mm	0.75
10 mm	0.94
12 mm	1.13
16 mm	1.51
20 mm	1.88
22 mm	2.07
25 mm	2.36

*Slight variation since digits are rounded off.

Width = 16mm

Thickness (mm)	Weight (kg/m)
5 mm	0.63
6 mm	0.75
8 mm	1.00
10 mm	1.26
12 mm	1.51
16 mm	2.01
20 mm	2.51
22 mm	2.76
25 mm	3.14

*Slight variation since digits are rounded off.

Also read: 16mm steel bar weight

Width = 20mm

Thickness (mm)	Weight (kg/m)
5 mm	0.79
6 mm	0.94
8 mm	1.26
10 mm	1.57
12 mm	1.88
16 mm	2.51
20 mm	3.14
22 mm	3.45
25 mm	3.93

*Slight variation since digits are rounded off.

Width = 25mm

Thickness (mm)	Weight (kg/m)
5 mm	0.98
6 mm	1.18
8 mm	1.57
10 mm	1.96
12 mm	2.36
16 mm	3.14
20 mm	3.93
22 mm	4.32
25 mm	4.91

*Slight variation since digits are rounded off.

Width = 32mm

Thickness (mm)	Weight (kg/m)
5 mm	1.26
6 mm	1.51
8 mm	2.01
10 mm	2.51
12 mm	3.01
16 mm	4.02
20 mm	5.02
22 mm	5.52
25 mm	6.28

*Slight variation since digits are rounded off.

MS flat weight chart for 6m bars (length)

All weights are calculated using the standard formula: Weight (kg/m) = Width × Thickness × 7.85/1000.

Width = 12mm

Thickness (mm)	Weight (6m)
5 mm	2.83
6 mm	3.40
8 mm	4.53
10 mm	5.66
12 mm	6.79
16 mm	9.06
20 mm	11.28
22 mm	12.45
25 mm	14.15

*Slight variation since digits are rounded off.

Also read: 12mm steel bar weight

Width = 16mm

Thickness (mm)	Weight (6m)
5 mm	3.78
6 mm	4.52
8 mm	6.03
10 mm	7.54
12 mm	9.06
16 mm	12.06
20 mm	15.08
22 mm	16.56
25 mm	18.84

*Slight variation since digits are rounded off.

Width = 20mm

Thickness (mm)	Weight (6m)
5 mm	4.71
6 mm	5.66
8 mm	7.54
10 mm	9.42
12 mm	11.30
16 mm	15.08
20 mm	18.84
22 mm	20.70
25 mm	23.58

*Slight variation since digits are rounded off.

Width = 25mm

Thickness (mm)	Weight (6m)
5 mm	5.89
6 mm	7.07
8 mm	9.42
10 mm	11.78
12 mm	14.15
16 mm	18.84
20 mm	23.58
22 mm	25.92
25 mm	29.45

*Slight variation since digits are rounded off.

Width = 32mm

Thickness (mm)	Weight (6m)
5 mm	7.56
6 mm	9.05
8 mm	12.06
10 mm	15.07
12 mm	18.10
16 mm	24.12
20 mm	30.12
22 mm	33.14
25 mm	37.68

*Slight variation since digits are rounded off.

*For informational purposes only. Actual figures can change. Please check with your steel supplier for actual dimensions and weight chart. Slight variations since digits are rounded off.

As can be seen from the tables above, the weight of MS flats for various combinations of width and length change as per the length of the bars. As such, it’s important that when you measure mild steel bars you do so with precision to ensure cost-effectiveness and efficiency in your construction and manufacturing projects.

Also read: Unit weight of steel bars – Calculate weight with formula

How to calculate MS flat weight

Why do you need to use a MS flat weight calculator? The simple answer is that the weight of MS flat bar will directly impact its prices. As such, if you are calculating weight accurately, the cost will be as per the weight and dimensions of the flat bars. This naturally will help you to make informed business decisions and order for the right quantity of MS flats for your project.

MS flat bar weight calculator formula:

Here’s the simple formula you can use to calculate the weight of MS flat bars:

Weight (W) in kgs = {Width (mm) × Thickness (mm) × Length (m) × 7.85}/1000

Here: 7.85 is the density of mild steel (7850 kg/m³)

Example of MS flat weight calculation:

Width = 50mm
Thickness = 5mm
Length = 10m

Weight of MS flat in kgs = (50 × 5 × 10 × 7.85)/1000 = 19.63 kg

MS flat weight per meter = 1.96 kg/m

MS flat weight per meter

In the table below we calculate the weight of MS flats per metre:

Width (mm)	Thickness (mm)	Weight (kg/m)
20	5	0.79
25	5	0.98
25	8	1.57
30	12	2.83
32	6	1.51
38	10	2.98

Note: Calculations are based on standard steel density of 7850 kg/m³. Actual weight may vary slightly due to manufacturing tolerances.

MS flat weight calculator (quick & easy method)

You can quickly calculate MS flat weight by entering the width, thickness, and length into the standard formula. For faster estimation, simply multiply width and thickness (in mm), then multiply by length (in meters), and apply the steel density factor (7.85). This acts as a quick MS flat weight calculator and helps you instantly estimate material requirements without referring to charts.

Common mistakes when calculating MS flat weight

Using wrong units

One of the most common errors is mixing units like mm and meters. Width and thickness should be in millimetres, while length must be in meters. Using the wrong units can lead to major calculation errors.

Ignoring steel density

The standard density of mild steel (7.85 or 7850 kg/m³) is essential for accurate results. Skipping or changing this value will give incorrect weight estimates.

Rounding errors

Rounding numbers too early in the calculation can affect the final result. Always round off only at the final step and maintain consistency (usually 2 decimal places).

Incorrect dimensions

Using wrong width or thickness values can lead to inaccurate weight calculation. Always double-check dimensions before applying the formula.

Tip: Small mistakes in calculation can lead to incorrect cost estimation, especially in bulk orders.

MS flat price per kg in India (2026)

• Mild steel prices in India (2026) generally range between ₹50 to ₹68 per kg depending on product type and grade.
• MS flats typically fall within ₹52 to ₹66 per kg based on size, brand, and location.
• Bulk orders (25+ tonnes) can reduce cost by ₹1–₹2 per kg.
• Prices vary by city due to logistics, demand, and supply conditions.

Mild steel flat bar prices in 2026 remain relatively stable but fluctuate based on raw material costs like iron ore and coking coal, along with construction demand. Since MS flats are widely used in fabrication and structural applications, their pricing closely follows overall steel market trends. Buyers should check with suppliers for real-time rates, as prices can change frequently.

Indicative MS flat price table (India – 2026)

Type/specification	Price range (₹/kg)
MS flat (standard)	₹52 – ₹64
Branded MS flat	₹58 – ₹68
Heavy thickness flats	₹54 – ₹66
Bulk purchase (25+ tonnes)	₹50 – ₹62

Note: Prices are indicative as of April 2026 and may vary based on location, quantity, and supplier.

MS flat vs MS angle vs MS square: Key differences

MS flat

MS flats are rectangular steel bars with a flat surface. They are widely used in fabrication, grills, frames, and light structural work. MS flats are easy to cut, bend, and weld, making them ideal for general-purpose applications. Their weight is calculated based on width and thickness.

MS angle

MS angles have an “L” shape and are commonly used in structural and load-bearing applications. They provide better strength and support compared to flats. MS angles are widely used in construction, frames, racks, and supports where rigidity is important.

MS square

MS square bars have equal width and thickness on all sides. They are mainly used in machining, shafts, and industrial components. MS squares offer uniform strength and are suitable for precision work and heavy-duty applications.

Key differences (quick view)

Shape: Flat (rectangular) vs Angle (L-shape) vs Square (equal sides).

Strength: MS angle > MS square > MS flat.

Use: Fabrication vs structural support vs machining.

Weight calculation: Varies based on shape and dimensions.

Tip: Choose MS flat for flexibility, MS angle for strength, and MS square for precision applications.

Conclusion

Understanding MS flat weight is essential for accurate material planning and cost control in construction and fabrication projects. By using standard formulas, correct dimensions, and updated weight charts, you can avoid errors and improve efficiency. Whether you are sourcing materials or estimating project requirements, having precise weight data helps in better decision-making. Always verify specifications with your supplier and stay updated with current market trends to ensure optimal results and cost-effective procurement of MS flats.

FAQs

What is MS flat weight per meter?

MS flat weight per meter depends on width and thickness. It is calculated using the formula: Width × Thickness × 7.85/1000. 

How to calculate MS flat weight?

Multiply width and thickness (in mm), then multiply by length (in meters) and 7.85, and divide by 1000. 

What is density of mild steel?

The standard density of mild steel is 7.85 g/cm³ or 7850 kg/m³. 

What is standard MS flat size?

Common sizes include width from 12 mm to 100 mm, thickness from 3 mm to 25 mm, and standard length of 6 meters. 

How much does 50x5 MS flat weigh?

A 50mm × 5mm MS flat weighs 1.96 kg per meter. 

What is the formula for MS flat weight?

Weight (kg) = Width × Thickness × Length × 7.85/1000. 

What is the weight of MS flat for 6 meters?

Multiply weight per meter by 6. For example, 1.96 kg/m becomes 11.76 kg for 6m. 

Why is MS flat weight important?

It helps estimate material cost, quantity, and load requirements accurately. 

Does MS flat weight vary by manufacturer?

Yes, slight variations (±1–2%) can occur due to rolling tolerances. 

What factors affect MS flat weight calculation?

Width, thickness, length, and steel density all impact the final weight.