What is a rectangular bar?
A rectangular steel bar is a kind of solid material with a rectangular shape, commonly used in the construction industry, machinery manufacturing and other fields. To calculate the weight of a rectangular steel bar, you can use the formula:
Where:
- is the weight of the bar in kg;
- is the length of the bar in meters;
- is the cross-sectional area of the bar in ;
- The specific weight of steel is approximately 7850 kg/m³.
The cross-sectional area of a rectangular bar is given by:
Therefore, to calculate the weight of a rectangular steel bar with width , height and length , the formula would be:
For example, if we have a rectangular bar with a width of 50 mm (0.05 m), a height of 20 mm (0.02 m) and a length of 1 meter, the calculation would be:
Therefore, the weight of the rectangular steel bar with these dimensions would be approximately 7.85 kg.

Rectangular Bar Weight Table
| Specifications. | Weight (kg/m) |
| 20*20*1.2 | 0.75 |
| 25*25*1.2 | 0.94 |
| 40*40*2 | 2.29 |
| 40*40*2.5 | 3.02 |
| 40*40*4 | 4.68 |
| 50*30*2.5 | 3.02 |
| 50*30*3 | 3.6 |
| 50*32*2 | 2.2 |
| 50*35*2.5 | 3.32 |
| 50*50*2.5 | 3.81 |
| 50*50*3 | 4.44 |
| 50*50*4 | 5.74 |
| 55*38*2 | 2.8 |
| 60*40*2.5 | 3.81 |
| 60*40*3 | 4.44 |
| 60*40*4 | 5.74 |
| 60*60*2.5 | 4.52 |
| 60*60*3 | 5.38 |
| 60*60*4 | 7.02 |
| 70*50*4 | 7.02 |
| 70*70*4 | 8.22 |
| 70*70*5 | 10.2 |
| 80*60*3 | 7.09 |
| 80*60*4 | 8.22 |
| 80*60*5 | 10:25 am |
| 80*80*4 | 9.96 |
| 80*80*6 | 13.85 |
| 90*40*2.5 | 5.19 |
| 90*60*5 | 10:47 am |
| 100*60*3 | 7.3 |
| 100*60*4 | 9.16 |
| 100*60*5 | 11.53 |
| 100*60*4.5 | 2:41 p.m. |
| 100*100*4 | 11:65 |
| 100*100*8 | 23 |
| 120*120*4 | 14.16 |
| 160*80*4.5 | 15.84 |
| 160*160*4.5 | 19.2 |
| 220*80*6 | 27.1 |







