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Steel Bars Weight Estimator

Author:

Piotr Sompoliński

Date added:

Steel products

The article explains how to calculate the weight of steel bars using simplified and precise formulas, as well as ready-made tables. The accompanying spreadsheet lets you enter your own dimensions and select different materials, including copper, aluminium, and nickel alloys. Feel free to download and use the tool.

How to calculate the weight of round steel bars?

Simplified method: bar diameter² [mm] × length [m] × 0.00617

Exact formula: π × bar diameter² [mm] / 4 × length [m] × 7.85

Table with calculated values:

Table - weight of round bar [kg]
Diameter [mm] Bar length [m]
1 1.5 2 2.5 3 3.5 4 4.5 5
1 0.006 0.009 0.012 0.015 0.018 0.022 0.025 0.028 0.031
2 0.025 0.037 0.049 0.062 0.074 0.086 0.099 0.111 0.123
3 0.055 0.083 0.111 0.139 0.166 0.194 0.222 0.250 0.277
4 0.099 0.148 0.197 0.247 0.296 0.345 0.395 0.444 0.493
5 0.154 0.231 0.308 0.385 0.462 0.539 0.617 0.694 0.771
6 0.222 0.333 0.444 0.555 0.666 0.777 0.888 0.999 1.110
7 0.302 0.453 0.604 0.755 0.906 1.057 1.208 1.359 1.511
8 0.395 0.592 0.789 0.986 1.184 1.381 1.578 1.776 1.973
9 0.499 0.749 0.999 1.248 1.498 1.748 1.998 2.247 2.497
10 0.617 0.925 1.233 1.541 1.850 2.158 2.466 2.774 3.083
11 0.746 1.119 1.492 1.865 2.238 2.611 2.984 3.357 3.730
12 0.888 1.332 1.776 2.220 2.663 3.107 3.551 3.995 4.439
13 1.042 1.563 2.084 2.605 3.126 3.647 4.168 4.689 5.210
14 1.208 1.813 2.417 3.021 3.625 4.229 4.834 5.438 6.042
15 1.387 2.081 2.774 3.468 4.162 4.855 5.549 6.242 6.936
16 1.578 2.368 3.157 3.946 4.735 5.524 6.313 7.103 7.892
17 1.782 2.673 3.564 4.454 5.345 6.236 7.127 8.018 8.909
18 1.998 2.996 3.995 4.994 5.993 6.992 7.990 8.989 9.988
19 2.226 3.339 4.451 5.564 6.677 7.790 8.903 10.016 11.129
20 2.466 3.699 4.932 6.165 7.398 8.632 9.865 11.098 12.331

 

Enter your own values in the free spreadsheet:

How to calculate the weight of square bars?

Simplified method: bar thickness (side)² [mm] × length [m] × 8 

Exact formula: bar thickness (side)² × length [m] × 7.85

Table with calculated values:

Table - weight of square bar [kg]
Side [mm] Bar length [m]
1 1.5 2 2.5 3 3.5 4 4.5 5
1 0.008 0.012 0.016 0.020 0.024 0.027 0.031 0.035 0.039
2 0.031 0.047 0.063 0.079 0.094 0.110 0.126 0.141 0.157
3 0.071 0.106 0.141 0.177 0.212 0.247 0.283 0.318 0.353
4 0.126 0.188 0.251 0.314 0.377 0.440 0.502 0.565 0.628
5 0.196 0.294 0.393 0.491 0.589 0.687 0.785 0.883 0.981
6 0.283 0.424 0.565 0.707 0.848 0.989 1.130 1.272 1.413
7 0.385 0.577 0.769 0.962 1.154 1.346 1.539 1.731 1.923
8 0.502 0.754 1.005 1.256 1.507 1.758 2.010 2.261 2.512
9 0.636 0.954 1.272 1.590 1.908 2.225 2.543 2.861 3.179
10 0.785 1.178 1.570 1.963 2.355 2.748 3.140 3.533 3.925
11 0.950 1.425 1.900 2.375 2.850 3.324 3.799 4.274 4.749
12 1.130 1.696 2.261 2.826 3.391 3.956 4.522 5.087 5.652
13 1.327 1.990 2.653 3.317 3.980 4.643 5.307 5.970 6.633
14 1.539 2.308 3.077 3.847 4.616 5.385 6.154 6.924 7.693
15 1.766 2.649 3.533 4.416 5.299 6.182 7.065 7.948 8.831
16 2.010 3.014 4.019 5.024 6.029 7.034 8.038 9.043 10.048
17 2.269 3.403 4.537 5.672 6.806 7.940 9.075 10.209 11.343
18 2.543 3.815 5.087 6.359 7.630 8.902 10.174 11.445 12.717
19 2.834 4.251 5.668 7.085 8.502 9.918 11.335 12.752 14.169
20 3.140 4.710 6.280 7.850 9.420 10.990 12.560 14.130 15.700

How to calculate the weight of hexagonal bars?

Simplified method: cross-section height² [mm] × length [m] × 0.0068 

Exact formula: cross-section height² [mm] × SQRT(3) × 7.85 × 2000 × length [m] 

Table with calculated values:

Table - weight of hexagonal bar [kg]
Height [mm] Bar length [m]
1 1.5 2 2.5 3 3.5 4 4.5 5
1 0.007 0.010 0.014 0.017 0.020 0.024 0.027 0.031 0.034
2 0.027 0.041 0.054 0.068 0.082 0.095 0.109 0.122 0.136
3 0.061 0.092 0.122 0.153 0.184 0.214 0.245 0.275 0.306
4 0.109 0.163 0.218 0.272 0.326 0.381 0.435 0.489 0.544
5 0.170 0.255 0.340 0.425 0.510 0.595 0.680 0.765 0.850
6 0.245 0.367 0.489 0.612 0.734 0.857 0.979 1.101 1.224
7 0.333 0.500 0.666 0.833 0.999 1.166 1.332 1.499 1.666
8 0.435 0.653 0.870 1.088 1.305 1.523 1.740 1.958 2.175
9 0.551 0.826 1.101 1.377 1.652 1.927 2.203 2.478 2.753
10 0.680 1.020 1.360 1.700 2.039 2.379 2.719 3.059 3.399
11 0.823 1.234 1.645 2.056 2.468 2.879 3.290 3.702 4.113
12 0.979 1.468 1.958 2.447 2.937 3.426 3.916 4.405 4.895
13 1.149 1.723 2.298 2.872 3.447 4.021 4.596 5.170 5.745
14 1.332 1.999 2.665 3.331 3.997 4.664 5.330 5.996 6.662
15 1.530 2.294 3.059 3.824 4.589 5.354 6.118 6.883 7.648
16 1.740 2.611 3.481 4.351 5.221 6.091 6.961 7.832 8.702
17 1.965 2.947 3.929 4.912 5.894 6.876 7.859 8.841 9.824
18 2.203 3.304 4.405 5.507 6.608 7.709 8.811 9.912 11.013
19 2.454 3.681 4.908 6.135 7.363 8.590 9.817 11.044 12.271
20 2.719 4.079 5.439 6.798 8.158 9.518 10.877 12.237 13.597

 

 

Post author

Piotr Sompoliński

CSO Virgamet

p.sompolinski@virgamet.pl
+48 793 726 124

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