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Steel (sariya) weight calculator
Find the weight of steel bars, or how many bars you get for a weight. Uses the standard formula weight (kg) = D² × L ÷ 162.
Result
Enter your sizes to see the result.
How it’s worked out
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How to use this calculator
- Choose what you know: the number of bars, or the weight in kg.
- Pick the bar size, from #3 (⅜ inch) to #10 (1¼ inch).
- Check the bar length: a standard bar is 12 m (39.37 ft).
- Enter the number of bars, or the weight.
- Read the total weight in kg and tons, or the number of bars.
Steel bar weight chart
| Bar | kg per metre | kg per foot | kg per 12 m bar | Bars per ton |
|---|---|---|---|---|
| #3 · ⅜″ (10 mm) | 0.56 | 0.171 | 6.72 | 148.8 |
| #4 · ½″ (12 mm) | 0.996 | 0.303 | 11.95 | 83.7 |
| #5 · ⅝″ (16 mm) | 1.556 | 0.474 | 18.67 | 53.6 |
| #6 · ¾″ (20 mm) | 2.24 | 0.683 | 26.88 | 37.2 |
| #7 · ⅞″ (22 mm) | 3.049 | 0.929 | 36.59 | 27.3 |
| #8 · 1″ (25 mm) | 3.982 | 1.214 | 47.79 | 20.9 |
| #9 · 1⅛″ (28 mm) | 5.067 | 1.544 | 60.8 | 16.4 |
| #10 · 1¼″ (32 mm) | 6.424 | 1.958 | 77.09 | 13 |
Grades: Grade 40 (280 MPa, mild steel), Grade 60 (420 MPa, the most common), Grade 72.5 (500 MPa) and Grade 75 (520 MPa). The grade doesn’t change the weight.
Frequently asked questions
What is the formula for steel weight?
Weight (kg) = D² × L ÷ 162, where D is the bar diameter in mm and L is the length in metres. For example, a 12 mm bar 12 m long weighs 12 × 12 × 12 ÷ 162 = 10.67 kg.
How many #4 bars are in one ton?
A #4 (½ inch, 12.7 mm) bar of 12 m weighs about 11.95 kg, so one ton (1,000 kg) is about 84 bars.
What is the length of one sariya bar?
The standard length in Pakistan is 12 metres, which is 39.37 feet (often called 40 feet).
Does steel grade change the weight?
No. Grade 40, 60, 72.5 and 75 bars of the same size weigh the same; the grade only tells you the strength.
Why is #4 called 12 mm?
A #4 bar is ½ inch (12.7 mm). It is sold as 12 mm, but the weight here uses 12.7 mm, the true size.