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Mild Steel or MS flats are low-carbon steel. These are not alloy steels but a type of standard steel with low carbon. This makes it 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. Having this understanding of what are mild steel flats, let’s learn to use a MS flat weight calculator (using formula) to make informed decisions when using mild steel flats in structural works.
MS flat weight chart:
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.
Also read: Unit weight of TMT bars – Learn to calculate for 8mm to 32mm
MS flat weight chart for 1m bars (Length)
Width = 12mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/metre (kg) | 0.47 | 0.56 | 0.75 | 0.94 | 1.13 | 1.50 | 1.88 | 2.07 | 2.34 |
*Slight variation since digits are rounded off.
Width = 16mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/metre (kg) | 0.63 | 0.75 | 1.00 | 1.25 | 1.51 | 2.01 | 2.50 | 2.75 | 3.13 |
*Slight variation since digits are rounded off.
Also read: 16mm steel bar weight
Width = 20mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/metre (kg) | 0.78 | 0.94 | 1.25 | 1.56 | 1.88 | 2.51 | 3.13 | 3.45 | 3.92 |
*Slight variation since digits are rounded off.
Width = 25mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/metre (kg) | 0.98 | 1.17 | 1.56 | 1.95 | 2.34 | 3.13 | 3.91 | 4.30 | 4.88 |
*Slight variation since digits are rounded off.
Width = 32mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/metre (kg) | 1.26 | 1.50 | 2.00 | 2.50 | 3.00 | 4.00 | 5.00 | 5.50 | 6.25 |
*Slight variation since digits are rounded off.
MS flat weight chart for 6m bars (Length)
Width = 12mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/ 6 metre (kg) | 2.87 | 3.39 | 4.52 | 5.66 | 6.78 | 9.04 | 11.30 | 12.43 | 14.13 |
*Slight variation since digits are rounded off.
Also read: 12mm steel bar weight
Width = 16mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/ 6 metre (kg) | 3.77 | 4.52 | 6.03 | 7.54 | 9.04 | 12.06 | 15.07 | 16.58 | 18.84 |
*Slight variation since digits are rounded off.
Width = 20mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/ 6 metre (kg) | 4.71 | 5.65 | 7.54 | 9.42 | 11.30 | 15.07 | 18.84 | 20.72 | 23.55 |
*Slight variation since digits are rounded off.
Width = 25mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/ 6 metre (kg) | 5.89 | 7.07 | 9.42 | 11.78 | 14.13 | 18.84 | 23.55 | 25.91 | 29.44 |
*Slight variation since digits are rounded off.
Width = 32mm
| Thickness (mm) | 5mm | 6mm | 8mm | 10mm | 12mm | 16mm | 20mm | 22mm | 25mm |
| Weight/ 6 metre (kg) | 7.54 | 9.04 | 12.06 | 15.07 | 18.09 | 24.12 | 30.14 | 33.16 | 37.68 |
*For informational purposes only. Actual figures can change. Please check with your steel supplier for actual dimensions and weight chart. Slight variation 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) x Thickness (mm) x Length (m) x 7.85 (kg/dm³)}/1000
Here: 7.85 is the density of mild steel in kg/dm³
Example of MS flat weight calculation:
Width = 50mm
Thickness = 5mm
Length = 10mm
Weight of MS flat in kgs = (50 x 5 x 10 x 7.85)/1000 = 19.625 kgs = 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 | Length | Thickness | Total weight | MS weight per metre |
| 1mm | 20mm | 4mm | 0.63 kg | 0.03 kg/m |
| 1mm | 25mm | 4mm | 0.79 kg | 0.03 kg/m |
| 1mm | 25mm | 8mm | 1.57 kg | 0.06 kg/m |
| 1mm | 30mm | 12mm | 2.83 kg | 0.09 kg/m |
| 1mm | 30mm | 4mm | 0.94 kg | 0.03 kg/m |
| 1mm | 32mm | 5mm | 1.26 kg | 0.04 kg/m |
| 1mm | 32mm | 6mm | 1.51 kg | 0.05 kg/m |
| 1mm | 38mm | 10mm | 2.98 kg | 0.08 kg/m |
| 1mm | 38mm | 5mm | 1.49 kg | 0.04 kg/m |
*Slight variation since digits are rounded off.
By now you should be able to calculate MS flats weight effortlessly to evaluate with precision the quantity of MS steel you will be requiring for your projects.
Remember – It is required for you to check with your steel supplier or manufacturer on the dimensions of the MS flats offered and purchase accordingly.
Sohini is a seasoned content writer with 12 years’ experience in developing marketing and business content across multiple formats. At Tata nexarc, she leverages her skills in crafting curated content on the Indian MSME sector, steel procurement, and logistics. In her personal time, she enjoys reading fiction and being up-to-date on trends in digital marketing and the Indian business ecosystem.
The MS flat weight chart is a great reference for common sizes, and the formula is easy to follow for calculating weight for any size MS flat. It’s going to help me to calculate the demand easily now. Thanks
Steel sections are manufactured with specific tolerances. This i can tell you as i have 20+ years experience in the field.
I’m working on a project that needs custom-sized MS flats. Is there a way to calculate the weight for non-standard sizes using the formula provided?